Nortel Networks 7400 - Manual (Page 130)

121 Internet Telephony Gateway (ITG) Trunk
ITG 1.0, 2.0 & 2.1 Trunk
• Allows Meridian 1 voice traffic to be sent over a
data network:
- Saves on international toll charges
(by leveraging existing or expanded flat-rate
IP data network, instead of per-minute-charge
circuit-switched PSTN)
- More efficient converged infrastructure –
one IP-based network pipe runs both data
and voice services between sites. Capacity
not used for data service at any given time is
available for voice service and vice-versa
- Increased flexibility – A single all-IP network can
frequently be changed more rapidly, allowing
businesses to respond more quickly to changing
needs
• Converts a traditional Meridian PBX to a
Meridian-Internet Enabled system:
- All traditionally attached PBX phones are
IP-enabled and can now make IP calls
• Build a network of Meridian systems:
- Share centralised voicemail with message-
waiting indication over IP
- Utilise Network Attendant Service over an
IP Telephony network
- Form a Network-based ACD (Automatic Call
Distribution) over an IP Telephony network
- Gain time-saving extra signalling features
when sending calls over an IP Trunk:
• Calling Line ID
• Caller-Name-Display
• QSig and MCDN signalling features
• Other features, similar to those provided
by a point-to-point PRI tie-line
- Meridian PBXs can use ITG Trunk to form a
virtual point-to-multipoint tie-line network.
This provides the functional equivalent of a
fully meshed tie-line network at a fraction of
the cost- IP-based trunks can greatly reduce the
need for tie-lines and point-to-point
D-Channels
ITG 2.1 Trunk
• 33% greater port density per card (32 ports)
• 50% less slot usage (single-slot IPE module).
– 2.67 times greater port density in same
number of slots
• Improved Indicator Lights (full indicators
for both Ethernet interfaces)
• Lower power consumption
• Greater processing power
Benefits and Applications
Ordering Information
For further information, please contact your local Nortel Networks Representative.