- LG Software Innovations Coffeemaker User Manual
Table Of Contents
- Title Page
- Revision history
- Contents
- About this guide
- Description
- System requirements
- List of ITG ISDN components
- Ordering rules and guidelines
- ITG ISL Trunk card description
- ITG ISL Trunk card physical description
- ISDN Signaling Link
- Dialing plans
- Quality of Service
- Fallback to alternate facilities
- Type of Service
- Fax support
- Remote Access
- Per-call statistics support using RADIUS Client
- SNMP MIB
- Codec profiles
- Security passwords
- ITG Engineering Guidelines
- Introduction
- Network engineering guidelines overview
- ITG traffic engineering
- Configuration of Meridian 1 routes and network translation
- Assess WAN link resources
- QoS Evaluation Process Overview
- Set QoS
- Measure intranet QoS
- Implement QoS in IP networks
- ITG Trunk DSP profile settings
- Post-installation network measurements
- Estimate QoS level
- ITG MAT PC management configuration
- Install and configure ITG ISL Trunk node
- Before you begin
- Installation Procedure Summary
- Create the ITG Trunk Installation Summary Sheet
- Install and cable ITG trunk cards
- Install NTCW84JA Large System I/O Panel 50-Pin filter adapter
- Install NTMF94EA and NTCW84KA cables
- D-channel cabling for the NT0961AA 24-Port ITG Trunk card
- Set NT6D80 MSDL switches
- Install filter and NTND26 cable (for MSDL and DCHIP cards in same Large System equipment row)
- Install filter and NTND26 cable (for MSDL and DCHIP cards in different Large System equipment rows)
- Configure ITG Trunk data on the Meridian 1
- Configure dialing plans within the corporate network
- Configure ITG Trunk data on MAT
- Transmit ITG trunk card configuration data from MAT to the ITG trunk cards
- Set date and time for the ITG ISL Trunk node
- Change the default ITG shell password to maintain access security
- Change default ESN5 prefix for non-ESN5 IP telephony gateways
- Check card software
- Configure MAT Alarm Management to receive SNMP traps from ITG ISL Trunk cards
- Make test calls to the remote ITG nodes
- Upgrade an ITG Trunk 1.0 node to support ISDN signaling trunks
- Upgrade procedure summary
- Before you begin
- Install the DCHIP hardware upgrade kit
- Upgrade the 8-port ITG basic trunk software to ITG ISL trunk software
- Remove ITG 1.0 configuration data from Meridian 1
- Configure the Meridian 1 ITG ISL Trunk data: upgrade considerations
- Verify ROM-BIOS version
- Upgrade Troubleshooting
- OA&M using MAT applications
- OA&M using the ITG shell CLI and overlays
- Maintenance
- Appendix A: Calbe description and NT8D81BA cable replacement
- NTMF94EA E - LAN, T - LAN and Serial Port cable
- NTCW84KA E-LAN, T-LAN, DCH & Serial cable
- NTAG81CA Faceplate Maintenance cable
- NTAG81BA Maintenance Extender cable
- NTCW84EA DCH PC Card Pigtail cable
- NTMF04BA MSDL extension cable
- NTCW84LA and NTCW84MA upgrade cables
- Prevent ground loops on connection to external customer LAN equipment
- Replace cable NT8D81BA with NT8D81AA
- Tools list
- NT8D81BA cable removal procedures
- Appendix B: Environmental and electrical regulatory data
- Appendix C: Subnet mask conversion from CIDR to dotted decimal format
- Appendix D: Configure a Netgear RM356 modem router for remote access
- Index
- Back
Page 78 of
378
ITG Engineering Guidelines
553-3001-202 Standard 1.00 April 2000
Disable silence suppression at tandem nodes
Silence suppression introduces a different concept of half-duplex or
full-duplex at the voice message layer that results in a kind of statistical
multiplexing of voice messages over the WAN.
When Meridian 1 equipped with an ITG node serves as a tandem switch in a
network where some circuit-switched trunk facilities have an excessively low
audio level, silence suppression, if enabled, will degrade the quality of service
by causing choppiness of speech. Under tandem switching conditions with
G.723.1
(5.3
kbit/s)
30 20 60 86 27.5 9.6 10.9 17.0
G723.1
(6.3
kbit/s)
30 24 64 90 28.8 10.2 11.5 17.0
T.30/T38
G3 Fax
Modem
(14.4
kbit/s)
16.6 30 70 96 46.1 33.6 37.5 50.9
25 30 70 96 30.7 22.4 25.0 33.9
Note 1:
Based on voice multiframe encapsulation for Realtime Transport Protocol per H.323 V2.
Note 2:
The bolded rows contain the default payload/packet size for each codec in the MAT.
Note 3:
T-LAN data rate is the effective Ethernet bandwidth consumption.
Note 4:
40% voice traffic reduction due to silence suppression; no suppression for fax.
Note 5:
T-LAN kbit/s for voice traffic = (1-40%)*2*Ethernet frame bits*8/frame duration in ms
Note 6:
WAN kbit/s for voice traffic = (1-40%)*IP packet bytes*8/frame duration in ms
Note 7:
24 ports per card for all codecs
Note 8:
Overhead (RTP/UDP header + IP header) of packets over the voice payload multiframe is 40
bytes; overhead of Ethernet frame over IP packet is 26 bytes.
Note 9:
The above bandwidth calculation does not include an Interframe gap, because of the low
probability of occurring in this type of application.
Table 5
Silence suppression enabled, T-LAN Ethernet and WAN IP bandwidth usage per ITG port
(Part 2 of 2)
Codec type
Codec
Multi -
frame
duration
in ms
(payload)
(one way)
Voice/fax
payload
Multi -
frame
in bytes
(one way)
IP voice
packet in
bytes
(one way)
Ethernet
voice
packet in
bytes
(one way)
Bandwidth
use on
T-LAN in
kbit/s
(two way)
Bandwidth
use on
WAN in
kbit/s
(one way)
WAN with
Frame
Relay
overhead
in kbit/s
(one-way)
WAN with
ATM
overhead
in kbit/s
(one-way)