Voice / Fax over IP Networks 100 Voice/Fax Over IP Networks Model MVP120 Proprietary Mode User Guide
User Guide MultiVOIP Series 100 Model MVP120 Product Number: S0000222 Revision A Copyright This publication may not be reproduced, in whole or in part, without prior expressed written permission from MultiTech Systems, Inc. All rights reserved. Copyright © 2001, by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose.
Contents Chapter 1 - Introduction to Multi-Tech’s MultiVOIP ................................................................. 6 Preview of This Guide ............................................................................................................. 7 Typical Application ................................................................................................................... 8 Front Panel Description ........................................................................................
Appendix A - TCP/IP (Transmission Control Protocol/Internet Protocol) Description....... 70 Internet Protocol (IP) ............................................................................................................. 72 Appendix B - Cabling Diagrams ............................................................................................ 73 Appendix C - Regulatory Information ..................................................................................... 75 Class A Statement ...............
Voice / Fax over IP Networks 100 Chapter 1 - Introduction
Chapter 1 - Introduction and Description Chapter 1 - Introduction to Multi-Tech’s MultiVOIP The MultiVOIP Series 100 (Model MVP120) allows analog voice and fax communication over a traditional data communications/data networking digital Internet. Multi-Tech’s new voice/fax gateway technology allows voice and fax communication to ride, with no additional expense, over your existing communications Internet, which has traditionally been data-only.
Chapter 1 - Introduction and Description Preview of This Guide This guide describes the MultiVOIP and tells you how to make the cable connections, install the software, and configure it. The information contained in each chapter is as follows: Chapter 1 - Introduction to Multi-Tech’s MultiVOIP This chapter describes the MultiVOIP features, a typical application, and the front and back panels.
Chapter 1 - Introduction and Description Typical Application Before VOIP (Voice Over IP) technology existed, a sales office used a data connection to the Internet and a voice connection to the public telephone network. Now, with VOIP, the two networks can be tied together. To accomplish this a Sales Office MultiVOIP is connected between the public telephone network and the data network as shown in the typical application below.
Chapter 1 - Introduction and Description Now, to add a phone number to the phone directory database, you bring up the Add/Edit Phone Entry dialog box. Click Add, and the Add/Edit Phone Entry dialog box displays. The Station Information group input the Phone Number, a Description (optional, but may be helpful if it is assigned to an individual or department; i.e., the Sales Office MultiVOIP), and Voice Channel of the unit, which in this case can only be Channel 1.
Chapter 1 - Introduction and Description for this MultiVOIP. The master MultiVOIP requires a static IP address so that the Client units know where the Host MultiVOIP is located in the network. The Identified By group defines the IP address of the MultiVOIP for which the telephone number is being assigned. The Ethernet Node ID number is the 12-digit Node ID# (0008005xxxxx) that is assigned to every unit during the manufacturing process and cannot be changed.
Chapter 1 - Introduction and Description addressing (i.e., the ISP is assigning the IP addressing), then this Client MultiVOIP will use dynamic addressing, and the IP Address field in the Identifed By group will be greyed out (inactive). If the Proxy Server is using static addressing, then the Type group would be static and the IP Address field in the Identified By group would contain the IP address of the Proxy Server.
Chapter 1 - Introduction and Description Front Panel Description The front panel has two groups of LEDs that provide the status of the Ethernet connection (Ethernet), the Voice/Fax channel, and an LED for the Boot status. The front panel is shown below, and a description of each LED follows. MVP120 Front Panel Boot The Boot indicator lights when the MultiVOIP is booting or downloading setup. Ethernet RD Receive Data indicator blinks when packets are being received from the local area network.
Chapter 1 - Introduction and Description Back Panel Description The cable connections for the MultiVOIP are made at the back panel. Connectors include Power, Command Port (RS232), Ethernet (10BASE-T), and the Voice/Fax Channel. The cable connectors are shown below and defined in the following groups.
Chapter 1 - Introduction and Description Specifications • One 1 Meg by 32 byte at 70 nanosecond SIMM is 4 Mb DRAM • Two Megabytes of flash memory Ethernet Port • Single Ethernet Interface--10BASE-T (twisted pair) keyed RJ-45 connector. Command Port • Single 19.
Voice / Fax over IP Networks 100 Chapter 2 Installation
Chapter 2 - Installation Chapter 2 - Installation Overview of the Installation Process The basic steps of installing your MultiVOIP network involve unpacking the units, connecting the cables, and configuring (Configuring is discussed in detail in Chapter 3) the units using the included management software (MultiVOIP Configuration). The recommended installation process includes four phases that, when completed, result in a fully functional Voice Over IP network.
Chapter 2 - Installation Unpacking the MultiVOIP www.multitech.com Remove all items from the box. Check to make sure that all items are included. Voice/Fax over IP Networks CL U.S.A MADE IN MADE IN U.S .A Unpacking Safety Warnings 1. A lithium battery on the circuit board provides backup power for the time keeping capability. The battery has an estimated life expectancy of ten years. When the battery starts to weaken, the date and time may be incorrect.
Chapter 2 - Installation Cabling the Host MultiVOIP Cabling your MultiVOIP involves making the proper Power, Command Port, and Internet connections. The figure below shows the back panel connectors and the associated cable connections. POWER ETHERNET COMMAND PHONE Cable Connections Cabling Procedure 1. Using the supplied cable, connect the power supply to a live AC outlet, then plug the power supply into the MultiVOIP as shown above. 2.
Voice / Fax over IP Networks 100 Chapter 3 Loading the Software
Chapter 3 - Loading the Software Chapter 3 - Loading the Software The following installation procedures do not provide every screen or option in the process of installing the MultiVOIP software. It is assumed that a technical person with a thorough knowledge of Windows and the software loading process is doing the installation. Additional information on the MultiVOIP software is provided in Chapter 4 and in the online Help. The software loads a default configuration.
Chapter 3 - Loading the Software 4. The MultiVOIP Setup welcome window displays. Press Enter or click Next to continue. 5. Follow the on-screen instructions to install your MultiVOIP software. You can either choose the Destination Location of your MVP120 software or select the default destination by clicking Next. To choose your Destination Location, click the Browse button. Multi-Tech Systems, Inc.
Chapter 3 - Loading the Software 6. The Setup dialog box enables you to select the COM port of your PC that is connected to the Command port of the MVP120. From the Select Port list, select the COM port of your PC. Click OK to continue. 7. The Setup Complete dialog displays. Click Finish. 8. The following message displays. Click No to continue. 9. In the Program group, double-click Upgrade Software. The Proprietary software loads. 10. The following window displays. Click Yes to continue. 11.
Voice / Fax over IP Networks 100 Chapter 4 Configuring the Host MultiVOIP
Chapter 4 - Configuring the Host MultiVOIP Chapter 4 - Configuring the Host MultiVOIP The following steps provide instructions for configuring your MVP120. The configuration sequence includes IP Protocol default setup, Channel setup, and Phone Directory Database setup. The numbering of steps continues from the previous section. 12. The IP Protocol Default Setup dialog box: The default Frame Type is TYPE_II.
Chapter 4 - Configuring the Host MultiVOIP In the Flash Hook Timer box, enter the amount of time the duration of flash hook signals output on the interface. The default setting is 600 milliseconds. For FXO-to-FXO communications, you can enable a specific kind of FXO Disconnect: Current Loss, Tone Detection, or Silence Detection. Check with your in-house phone personnel to verify the type of disconnect to use.
Chapter 4 - Configuring the Host MultiVOIP The Silence Compression option defines whether silence compression is enabled for the selected voice channel. If enabled, the MVP120 will not transmit voice packets when silence is detected, thereby reducing the amount of network bandwidth being used by the voice channel. The Echo Cancellation options defines whether echo cancellation is enabled for the selected voice channel. If enabled, the MVP120 will remove echo, which improves sound quality.
Chapter 4 - Configuring the Host MultiVOIP 23. Click the Regional tab to change the Tone Pairs and to select your country/region from the Country/Region list. The Tone Pairs group parameters change per your choice. Click OK when finished. The upgrade takes several minutes to complete. 24. The Phone Directory Database dialog box displays. You will build your personalized MultiVOIP Phone Directory in the following steps. Note: The MultiVOIP configured as a “Host” will contain the host database.
Chapter 4 - Configuring the Host MultiVOIP 26. The Description is optional, but can be useful in associating the channel to the extension. 27. Enter the Voice Channel number corresponding to the phone number entered. 28. Click the Permit Hunting check box if you want calls to roll over to a second voice/ fax on an answering 2-, 4-, or 8-port client MultiVOIP when the first channel is busy. Note: Hunting will work between channels on the same MultiVOIP.
Chapter 4 - Configuring the Host MultiVOIP Note: If the remote MultiVOIP is located behind a proxy server that uses a dynamically assigned IP address, select Dynamic (disabling Static IP Address) and leave the IP Address box blank. The Host MultiVOIP will learn the IP address when it is contacted by the client MultiVOIP. 34. Enter the IP address of the client MultiVOIP in the IP Address box in the MultiVOIP Identification group. 35.
Voice / Fax over IP Networks 100 Chapter 5 Configuring the Client MultiVOIPs
Chapter 5 - Configuring the Client MultiVOIPs Chapter 5 - Configuring the Client MultiVOIPs If you are installing a MultiVOIP behind a firewall, you need to add the following UDP ports to your firewall. 900 Q.931 Signaling Information 5004 RTP Packets 5000 Status Information 5005 RTCP Packets Refer to your firewall user documentation to enter and open these ports. 1. Disconnect the PC from the command port of the Host MultiVOIP and connect it to the command port on the Client MultiVOIP. 2.
Chapter 5 - Configuring the Client MultiVOIPs 5. The Channel Setup dialog box defines the voice coder, fax parameters, and regional telephone parameters for the voice channel. 6. Check with your in-house telephone personnel to verify whether your local PBX dial signaling is Pulse or DTMF (tone). Select the regeneration option accordingly. In the Max Dial Digits box, enter the maximum number of digits allowed when dialing a phone number. The default setting is 5.
Chapter 5 - Configuring the Client MultiVOIPs To change the voice coder, select the new voice coder entry from the Voice Coder list. If you changed the voice coder, ensure that the same voice coder is used on the voice/fax channel you are calling. Otherwise, you will always get a busy signal. Note: If Automatic Coder is selected, enter the bandwidth in the Max Bandwidth box. Check with your Network Administrator to determine available bandwidth. 8.
Chapter 5 - Configuring the Client MultiVOIPs 9. The Billing/Security tab displays the parameters for billing options, call authentication, and automatic disconnection. 10. You can set up billing options for inbound and outbound calls by selecting them in the Billing Options group and then entering the charge in cents per number of seconds. 11. The Call Authentication option enables password protection for outbound and inbound calls on the voice/fax channel.
Chapter 5 - Configuring the Client MultiVOIPs 14. Click OK. After the upgrade is complete, click Start | Programs| MultiVOIP | MultiVOIP Configuration. On the main menu, click Phone Book to display the Phone Directory Database dialog box. In the Database Type group, click the Client option. The Host IP Address box becomes active. 15. Enter the IP address of the host MultiVOIP in the Host IP Address box. 16. Click OK and you are returned to the main menu. 17.
Chapter 5 - Configuring the Client MultiVOIPs 19. Verify that the Boot LED on the MultiVOIP is off after the download is complete. This may take several minutes as the MultiVOIP reboots. 20. You are returned to the main menu. Your MultiVOIP is operational at this time. Repeat this procedure for each of the client units. When all clients have been configured, proceed with deploying the VOIP network. Multi-Tech Systems, Inc.
Voice / Fax over IP Networks 100 Chapter 6 Deploying the VOIP Network
Chapter 6 - Deploying the VOIP Network Chapter 6 - Deploying the VOIP Network Deploying the VOIP network involves the VOIP Administrator developing the VOIP Dialing Directory and deploying the pre-configured client MultiVOIPs to their remote sites. The remote site administrators need only connect power to the pre-configured MultiVOIP, connect it to their Ethernet LAN and predefined telephone equipment, and then wait for the phone directory database to be downloaded.
Chapter 6 - Deploying the VOIP Network Connecting the Client MVP120 1. Connect one end of the power supply to a live AC outlet and connect the other end to the Power connection on your MultiVOIP. Vo i c e / F a x C h a n n e l Connection P H O N E ETHERNET POWER F O XX F O P S T N Power Connection Ethernet Connection Remote Site Cable Connection 2. Connect a network cable to the ETHERNET (RJ-45) connector on the back of your MultiVOIP. 3.
Voice / Fax over IP Networks 100 Chapter 7 Using the MultiVOIP Software
Chapter 7 - Using the MultiVOIP Software Chapter 7 - Using the MultiVOIP Software This chapter describes various features of the MultiVOIP software that enable you to change the configuration of your MultiVOIP. The default configuration parameters were entered during the loading of the software (Chapter 3). The MultiVOIP software and configuration utilities described in this chapter enable you to change that initial configuration as necessary.
Chapter 7 - Using the MultiVOIP Software The status bar at the bottom of the Setup menu displays the current status of the unit and shows, for example, if it is Running, the most recent date the unit was configured, the type of connection you have to the unit, and your rights. It shows if your PC is connected directly to the command port of the MultiVOIP or is communicating with the Ethernet port. The Rights box displays whether the user has Read/Write or Read-Only rights.
Chapter 7 - Using the MultiVOIP Software The Auto Call option allows the local MultiVOIP to call a remote MultiVOIP without the user having to dial a Phone Directory Database number. As soon as you access the local MultiVOIP voice/fax channel, the MultiVOIP immediately connects to the remote MultiVOIP that you identified in the Remote MultiVOIP Phone Number box of this option. Check with your in-house telephone personnel to verify whether your local PBX dial signalling is Pulse or DTMF (tone).
Chapter 7 - Using the MultiVOIP Software The Input Gain and Output Gain lists enable you to select the amount of gain you want. Gain is the increased signalling power that occurs as the signal is boosted by the MVP120. The Input Gain list defines the voice input gain for the Voice/Fax channel. Before the MVP120 digitizes voice, the volume can be increased or decreased. Input gain modifies the level of audio coming into the voice channel before it is sent over the Internet to a remote MultiVOIP.
Chapter 7 - Using the MultiVOIP Software automatic disconnection. You can set up billing options for inbound and outbound calls by selecting them in the Billing Options group and then entering the charge in cents per number of seconds. The Call Authentication option enables password protection for outbound and inbound calls on the selected voice/fax channel. If you enable password protection on inbound/outbound calls, you need to enter a password of up to 14 numeric characters in the Password box.
Chapter 7 - Using the MultiVOIP Software From the Country/Region list you can select the country or region for which you are configuring the MultiVOIP. The Tone Pairs group always displays the tones used in the country or region currently selected. In addition to Australia, Central America, Chile, Europe, France, Japan, UK, and USA, there is a Custom selection (with defaults identical to USA) that will make the Custom button active.
Chapter 7 - Using the MultiVOIP Software The phone number does not have to be a conventional phone number such as 555-1234. It can be a single digit or several digits, except it cannot be longer than the entry in the Max Dial Digits box in the Channel Setup dialog box. For example, you could enter a phone number of 101 with a description of New York Office. If you want the call to be rolled over to a second channel, select the Permit Hunting check box.
Chapter 7 - Using the MultiVOIP Software When you enter this information and click OK, the information is loaded into the phone directory database. To add a second entry, click Add and the Add/Edit Phone Entry dialog box displays again. After the host entries are added to the database, the same data has to be added for each client MultiVOIP.
Chapter 7 - Using the MultiVOIP Software When a MultiVOIP’s connection to the Internet is through a Proxy Server, the WAN port on the Proxy Server must have a static registered IP address. Remote MultiVOIPs will only be able to access a MultiVOIP located behind a Proxy Server at the static IP address. This static IP address will be used in the Phone Directory Database when assigning directory numbers to this MultiVOIP.
Chapter 7 - Using the MultiVOIP Software SNMP related operations can be performed only when the SNMP Agent is enabled on this dialog box. The IP address of the system, such as SNMP Manager that will receive the Traps from the MultiVOIP should be entered in the IP Address box. The Community Name of the SNMP Manager receiving the Traps can be a maximum of 19 characters and is case sensitive. The default Port Number of the SNMP Manager receiving the Traps is 162.
Chapter 7 - Using the MultiVOIP Software IP Statistics IP is a connection-less network protocol residing in the network layer of a conventional OSI layered model (for more information on this model, refer to Appendix A).
Chapter 7 - Using the MultiVOIP Software SNMP Statistics The SNMP Statistics dialog box provides statistical information on Simple Network Management Protocol (SNMP). SNMP is an application layer protocol that facilitates the exchange of management information between network devices. There are three key components in SNMP; the devices that are to be managed, agents, and the network management systems. The managed device is the network device, like a router.
Chapter 7 - Using the MultiVOIP Software Viewing Logs The Log Entries dialog box displays a chronological history of all calls into and out of this unit. This dialog box is accessed by clicking Logs in the Statistics dialog box. The Log Entries dialog box displays each call as a sequentially numbered Event with the date, time, duration of the call, the status of the call (Successful or Unsuccessful), Mode (Voice or Fax), and the from and to numbers.
Chapter 7 - Using the MultiVOIP Software Viewing Channel Totals The Channel Totals dialog box displays Outgoing and Incoming calls with their Attempted and Completed numbers for each channel on this MultiVOIP. The Total Connected Time for the channel also displays. Reports A report of the contents of the Log Entries dialog box can be generated using the Windows Notepad accessory and then printed from your local PC.
Chapter 7 - Using the MultiVOIP Software Enter your LAN IP Address, Subnet Mask, and Gateway Address in the IP Protocol Default Setup dialog box. Click OK when finished. Enter your current configuration in the Channel Setup dialog box. Click OK when finished. Click OK. The MultiVOIP firmware and coders download, then the MultiVOIP reboots. Multi-Tech Systems, Inc.
Chapter 7 - Using the MultiVOIP Software Manual Upgrade Procedure Use this procedure only if you want to manually upgrade your MultiVOIP. Note: Steps 4-8 may be performed via the command port or over IP. 1. Run MultiVOIP Configuration from your old version of the MultiVOIP software. Note the current settings. Your MultiVOIP will be reset to factory defaults during this upgrade. 2.
Voice / Fax over IP Networks 100 Chapter 8 Remote Configuration
Chapter 8 - Remote Configuration and Management Chapter 8 - Remote Configuration and Management This chapter provides procedures for viewing or changing the configuration of a remote unit. Two methods are provided to access a remote unit; the first method is modem based and the second method is using IP. Within the IP method, three applications can be used: 1) LANBased using TFTP (Trivial l File Transfer Protocol), 2) Telnet as a client application, or 3) a standard web browser on the Internet.
Chapter 8 - Remote Configuration and Management Verify that the Communication Type is set for COM Port and the Select Port box is set for the COM port of your local PC. In the Dial String box, enter the AT command for dialing (ATDT) plus the phone number of the remote MultiVOIP. If your Modem Initialization String, Initialization Response, or Connect Response values are different than the defaults in the dialog box, refer to your modem user documentation and change the default values to match your modem.
Chapter 8 - Remote Configuration and Management LAN-Based The LAN-based remote configuration requires a Windows Sockets compliant TCP/IP stack. TCP/IP protocol software must be installed and functional before the configuration program can be used. 1. You must assign an Internet (IP) address for the PC and for each node that will be managed by the configuration program. Refer to the protocol software documentation for instructions on how to set the IP addresses.
Chapter 8 - Remote Configuration and Management 7. After you have changed the configuration of the remote MultiVOIP, click Download Setup to update the configuration. The remote MultiVOIP will be brought down, the new configuration written to the unit, and the unit will reboot. 8. Click Exit when the downloading is complete. 9. Double-click the MultiVOIP Configuration icon in the program group to verify that the MultiVOIP is running. Multi-Tech Systems, Inc.
Chapter 8 - Remote Configuration and Management Telnet A typical Telnet client application is described next. The MultiVOIP has a built-in Telnet Server that enables Telnet client PCs to access the MultiVOIP. A typical Telnet client is allowed to configure the MultiVOIP. In addition, the MultiVOIP can be remotely accessed and configured from any where on the Internet through its Web interface.
Chapter 8 - Remote Configuration and Management Web Management The MultiVOIP can be accessed, using a standard Web browser, from anywhere on the connected Internet. In order to provide this support, select the WEB Server check box in the Applications Setup dialog box (see Chapter 6, Using the MultiVOIP Software). Once enabled, users can access the MultiVOIP by entering its IP address in the Address box of their Web browser. The following Web page appears.
Voice / Fax over IP Networks 100 Chapter 9 Warranty, Service,and Technical Support
Chapter 9 - Warranty, Service, and Technical Support Chapter 9 - Warranty, Service, and Technical Support This chapter starts out with statements about your MultiVOIP warranty. The next section, Technical Support, should be read carefully if you have questions or problems with your MultiVOIP. It includes the technical support phone numbers, space for recording your product information, and an explanation of how to send in your MultiVOIP should you require service.
Chapter 9 - Warranty, Service, and Technical Support Please direct your questions regarding technical matters, product configuration, verification that the product is defective, etc., to our Technical Support department at (800) 972-2439 or email tsupport@multitech.com. Please direct your questions regarding repair expediting, receiving, shipping, billing, etc., to our Repair Accounting department at (800) 328-9717 or (763) 7175631, or email mtsrepair@multitech.com.
Chapter 9 - Warranty, Service, and Technical Support Service If your tech support specialist decides that service is required, your MultiVOIP may be sent (freight prepaid) to our factory. Return shipping charges will be paid by Multi-Tech Systems. Include the following with your MultiVOIP: • a description of the problem • return billing and return shipping addresses • contact name and phone number • check or purchase order number for payment if the MultiVOIP is out of warranty.
Chapter 9 - Warranty, Service, and Technical Support Technical Support Multi-Tech has an excellent staff of technical support personnel available to help you get the most out of your Multi-Tech product. If you have any questions about the operation of this unit, call 1-800-972-2439. Please fill out the MultiVOIP information (below), and have it available when you call.
Voice / Fax over IP Networks 100 Appendixes
Appendix A - TCP/IP Description Appendix A - TCP/IP (Transmission Control Protocol/ Internet Protocol) Description TCP/IP is a protocol suite and related applications developed for the U.S. Department of Defense in the 1970s and 1980s specifically to permit different types of computers to communicate and exchange information with one another. TCP/IP is currently mandated as an official U.S. Department of Defense protocol and is also widely used in the UNIX community.
Appendix A - TCP/IP Description TCP, described in RFC 793 ( ftp://ds.internic.net/rfc/rfc793.txt) provides a virtual circuit (connection-oriented) communication service across the network. TCP includes rules for formatting messages, establishing and terminating virtual circuits, sequencing, flow control, and error correction. Most of the applications in the TCP/IP suite operate over the “reliable” transport service provided by TCP. UDP, described in RFC 768 (ftp://ds.internic.net/rfc/rfc768.
Appendix A - TCP/IP Description Internet Protocol (IP) IP is the Internet standard protocol that tracks Internetwork node addresses, routes outgoing messages and recognizes incoming messages, allowing a message to cross multiple networks on the way to its final destination. The IPv6 Control Protocol (IPV6CP) is responsible for configuring, enabling, and disabling the IPv6 protocol modules on both ends of the point-to-point link.
Appendix B - Cabling Diagrams Appendix B - Cabling Diagrams Command Port Cable 1 2 3 4 5 6 7 8 RJ-45 DB9F 1 4 2 7 3 8 CLEAR TO SEND 4 3 TRANSMIT DATA 5 2 RECEIVE DATA 6 6 7 1 8 5 PIN NO. To Command Port Connector PIN NO.
Appendix B - Cabling Diagrams Remote Configuration Cable 9-Pin Male To Command port adapter cable 25-Pin Male To DCE Device (e.g., modem) Receive Data (RX) 2 2 Receive Data (RX) Transmit Data (TX) 3 3 Transmit Data (TX) Signal Ground 5 7 Signal Ground Clear to Send (CTS) 8 4 Request to Send (RTS) Multi-Tech Systems, Inc.
Appendix C - Regulatory Information Appendix C - Regulatory Information Class A Statement FCC Part 15 NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Appendix C - Regulatory Information FCC Part 68 Telecom 1. This equipment complies with Part 68 of the Federal Communications Commission (FCC) rules. On the outside surface of this equipment is a label that contains, among other information, the FCC registration number. This information must be provided to the telephone company. 2. As indicated below, the suitable jack (Universal Service Order Code connecting arrangement) for this equipment is shown.
Appendix C - Regulatory Information Canadian Limitations Notice Ringer Equivalence Number Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a phone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the ringer equivalence numbers of all the devices does not exceed 5.
Voice / Fax over IP Networks 100 Glossary
Glossary Glossary A Access: The T1 line element made up of two pairs of wire that the phone company brings to the customer premises. The Access portion ends with a connection at the local telco (LEC or RBOC). ACK (ACKnowledgement code) (pronounced "ack"): A communications code sent from a receiving modem to a transmitting modem to indicate that it is ready to accept data. It is also used to acknowledge the error-free receipt of transmitted data. Contrast with NAK.
Glossary Byte: The unit of information a computer can handle at one time. The most common understanding is that a byte consists of 8 binary digits (bits), because that's what computers can handle. A byte holds the equivalent of a single character (such as the letter A). C Call Setup Time: The time to establish a circuit-switched call between two points. Includes dialing, wait time, and CO/long distance service movement time.
Glossary Digital Data: Information represented by discrete values or conditions (contrast "Analog Data"). Digital Loopback: A technique used for testing the circuitry of a communications device. Can be initiated locally, or remotely (via a telecommunications device). The tested device decodes and encodes a received test message, then echoes the message back. The results are compared with the original message to determine if corruption occurred en route.
Glossary Foreign Exchange (FX): A CO trunk with access to a distant CO, allowing ease of access and flat-rate calls anywhere in the foreign exchange area. Foreign Exchange Office (FXO): provides local phone service from a CO outside of ("foreign" to) the subscriber's exchange area. In simple form, a user can pick up the phone in one city and receive a tone in the foreign city. Connecting a POTS phone to a computer telephony system via a T1 link requires a channel bank configured for the FX connection.
Glossary I/O Addresses: Locations within the I/O address space of your computer used by a device, such as an expansion card, a serial port, or an internal modem. The address is used for communication between software and a device. IRQ Level (Interrupt Request Level): The notification a processor receives when another portion of the computer's hardware requires its attention. IRQs are numbered so that the device issuing the IRQ can be identified, and so IRQs can be prioritized.
Glossary Multithreading: The ability of a software system to be able to handle more than one transaction concurrently. This is contrasted to the case where a single transaction is accepted and completely processed before the next transaction processing is started. N NAK (Negative Acknowledgment): Communications code used to indicate that a message was not properly received, or that a terminal does not wish to transmit. Contrast with ACK.
Glossary PROM (Programmable Read Only Memory - pronounced "prom"): A permanent memory chip that can be programmed or filled by the customer after by the manufacturer has set initial values. Contrast with ROM. Protocol: 1. A set of semantic and syntactic rules that determines the behavior of functional units in achieving communication. 2.
Glossary Signaling: The process of establishing, maintaining, accounting for, and terminating a connection between two endpoints (e.g., the user premises and the telco CO). Central office signals to the user premises can include ringing, dial tone, speech signals, etc. Signals from the user's phone can include off-hook, dialing, speech to far-end party, and on-hook signals. In-band signaling techniques include pulse and tone dialing. With common channel signaling, information is carried out-of-band.
Glossary U UART (Universal Asynchronous Receiver/Transmitter) (pronounced "you art"): A chip that transmits and receives data on the serial port. It converts bytes into serial bits for transmission, and vice versa, and generates and strips the start and stop bits appended to each character. UNIX: An operating system developed by Bell Laboratories that features multiprogramming in a multi-user environment. Unshielded Twisted Pair (UTP): Telephone-type wiring. Transmission media for 10Base-T. V V.
Index E Index A About the Internet ........................................... Archie ............................................................. Auto Call Enable ............................................. Automatic Disconnect .................................... 68 71 25 45 B Back Panel ..................................................... baud rate ........................................................ Billing Options ................................................ Billing/Security tab .......
Index M Manual Upgrade Procedure ........................... Max Baud Rate .............................................. Max Dial Digits ............................................... Modem-Based Remote Configuration ............ MultiVOIP 100 Setup dialog box .................... MultiVOIP Configuration ................................. MultiVOIP Identification group ........................ MultiVOIP Telnet Server Menu .......................
