Product Compatibility With Other Itg Products; Virtual Superloops, Virtual Tns And Physical Tns - Nortel Meridian ITG Line 2.0 Description, Installation And Operation Manual

Page 52 of 302 Meridian 1 capacity engineering guidelines

Product compatibility with other ITG products

Virtual superloops, virtual TNs and physical TNs

553-3001-204 Preliminary 0.10 August 2000
Nortel Networks manufactures three Voice Over IP (VoIP) products in
addition to ITG Line 2.0. This section explains how the ITG Line 2.0 card
relates to the ITG products listed below:
• Meridian Internet Telephony Gateway Line 1.0 card/IP Telecommuter
• Meridian Internet Telephony Gateway Trunk 1.0 card/Basic per-trunk
signaling
• Meridian Internet Telephony Gateway Trunk 2.0 card/ISDN Signaling
Link
All cards within a node must be on the same subnet. Each ITG product uses
T-LANs and E-LANs that can co-exist with each other. All cards within a
node must be on the same subnet. They can share the same T-LANs, and must
share the same E-LAN. You need to engineer the traffic on the T-LAN to
consider all ITG applications.
For EMC compliance, add up all the ITG products to stay within EMC limits.
The ITG cards all require two slots in a module or cabinet.
Meridian IP Telecommuter is an H.232 application and requires a separate
line card. All ITG applications require their own card.
Virtual TNs allow configuration of service data on a terminal, such as key
layout and class of service, without requiring the i2004 Internet Telephone
physical terminal to be directly connected (hard-wired) to the Meridian 1
XDLC line card. Calls are made between an i2004 Internet Telephone and
traditional sets/trunks using the full Meridian 1 feature set. DSP channels are
allocated dynamically for this type of call to perform the transcoding required
to connect the i2004 Internet Telephone to the TDM network.
A new type of superloop (a virtual superloop) is introduced by the i2004
Internet Telephone to support i2004 Internet Telephone configuration. To
create i2004 Internet Telephones through the use of VTNs, you must create a
virtual superloop in Overlay 97. Up to 1024 VTNs can be configured on a
single virtual superloop for a large system. Up to 128 VTNs can be
configured on a single virtual superloop for a small system, leading to a
maximum number of 640 VTNs per system.