User guide

Chapter 4—Configuring your VOIP
Multi-Tech Systems, Inc. 26
Field Name
Values
Description
802.1p PRIORITY LEVELS:
LOWEST PRIORITY
1 – Background: Bulk transfers and other activities permitted on the network, but should not affect the
use of network by other users and applications.
2 – Spare: An unused (spare) value of the user priority.
0 – Best Effort (default): Normal priority for ordinary LAN traffic.
3 – Excellent Effort: The best effort type of service that an information services organization would
deliver to its most important customers.
4 – Controlled Load: Important business applications subject to some form of “Admission Control”, such
as preplanning of Network requirement, characterized by bandwidth reservation per flow.
5 – Video: Traffic characterized by delay < 100 ms.
6 – Voice: Traffic characterized by delay < 10 ms.
7 - Network Control: Traffic urgently needed to maintain and support network infrastructure.
HIGHEST PRIORITY
Call Control Priority
0-7, where 0 is
lowest priority
Sets the priority for signaling packets.
VOIP Media Priority
0-7, where 0 is
lowest priority
Sets the priority for media packets.
Others (Priorities)
0-7, where 0 is
lowest priority
Sets the priority for SMTP, DNS, DHCP, and other packet types.
VLAN ID
1 - 4094
The 802.1Q IEEE standard allows virtual LANs to be defined within a network. This
field identifies each virtual LAN by number.
IP Parameter fields
Gateway Name
alphanumeric
Descriptor of current VOIP unit to distinguish it from other units in system.
Enable DHCP
Y/N
disabled by default
Dynamic Host Configuration Protocol is a method for assigning IP address and other
IP parameters to computers on the IP network in a single message with great
flexibility. IP addresses can be static or temporary depending on the needs of the
computer.
IP Address
n.n.n.n
The unique LAN IP address assigned to the MultiVOIP.
IP Mask
n.n.n.n
Subnetwork address that allows for sharing of IP addresses within a LAN.
Gateway
n.n.n.n
The IP address of the device that connects your MultiVOIP to the Internet.
Diff Serv
Parameter
fields
Diff Serv PHB (Per Hop Behavior) values pertain to a differential prioritizing system for IP packets as
handled by Diff Serv-compatible routers. There are 64 values, each with an elaborate technical description.
These descriptions are found in TCP/IP standards RFC2474, RFC2597, and, for present purposes, in
RFC3246, which describes the value 34 (34 decimal; 22 hex) for Assured Forwarding behavior (default for
Call Control PHB) and the value 46 (46 decimal; 2E hexadecimal) for Expedited Forwarding behavior (default
for VOIP Media PHB). Before using values other than these default values of 34 and 46, consult these
standards documents and/or a qualified IP telecommunications engineer.
To disable Diff Serv, configure both fields to 0 decimal.
Call Control PHB
0 – 63
default = 34
Value is used to prioritize call setup IP packets.
Setting this parameter to 0, in conjunction with VOIP Media PHB disables Diff Serv.
VOIP Media PHB
0 – 63
default = 46
Value is used to prioritize the RTP/RTCP audio IP packets.
Setting this parameter to 0, in conjunction with Call Control PHB disables Diff Serv.
FTP Parameter fields
FTP Server
Enable
Y/N
Default = disabled
See “FTP Server
File Transfers” in
Chapter 6
MultiVOIP unit has an FTP Server function so that firmware and other important
operating software files can be transferred to the VOIP via the network.
DNS Parameter fields
Enable DNS
Y/N
Default = disabled
Enables Domain Name Space/System function where computer names are resolved
using a worldwide distributed database.