- Hewlett-Packard Carrier MultiPath Switch Product Guide

1-8 P/N 480-0005-00-15
Chapter 1: Overview
Trunk Circuit Originated Calls
A call coming from a Trunk Circuit may be switched to either the data network as a VoIP call, a Line Circuit,
or trunk typically for connection to a termination device on the users premises such as a PBX. The routing
decision made by the Tenor CMS is based upon your configuration and the dialed number.
Figure 1-3 Trunk Circuit Call Routing
Intra-trunk Routing - “Hairpinning”
As a result of intra-trunk routing, incoming calls from a particular Trunk Circuit are switched by Tenor CMS
to be routed back out the same trunk circuit routing group.
Figure 1-4 Intra-Trunk Routing
Line
Circuits
Ethernet
PSTN B
Trunk
Circuits
Trunk
Circuits
PSTN A
Ethernet
(IP Network)
Tenor CMS
PBX
VOIP Call
Circuit
Call
Circuit
Call
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2
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Line
Circuits
Ethernet
PSTN B
Trunk
Circuits
Trunk
Circuits
PSTN A
Ethernet
(IP Network)
Tenor CMS
PBX
VOIP Call
Circuit
Call
Circuit
Call
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Link TX/RX
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3
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StatusAlarm
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PCICPU
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TX/RXLink
1
2
3
4
5
6
7
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Span
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TECHNOLOGIES,
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