Cisco VG30D, User Manual

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Cisco VG30D Voice Gateway User Guide
OL-19276-01
Chapter 1 Introduction
The Cisco VG30D Voice Gateway
•
A QSIG (or DPNSS) PBX to a DPNSS (or QSIG) network, or
• A number of DPNSS PBXs to a QSIG or Q.931 backbone network (VoIP or ATM, for example), or
•
A DPNSS PBX to a Q.931-based Public ISDN service (such as ISDN 30e).
When you are attaching a QSIG (or DPNSS) PBX to a DPNSS (or QSIG) network, Cisco VG30D Voice
Gateway provides seamless service interworking between the attached PBX and other PBXs in the
network, including inter-operation of most of the commonly used services.
Cisco VG30D Voice Gateway facilitates basic call interworking, including simple services such as
calling and connected identity when attaching a number of DPNSS PBXs to a QSIG or Q.931 backbone
network, or a DPNSS PBX to a Q.931-based Public ISDN service.
In addition, when attaching a number of DPNSS PBXs to a QSIG backbone network, the, Cisco VG30D
Voice Gateway can transport DPNSS signalling across the network and deliver it practically
transparently through a similar InterChange unit to a remote DPNSS PBX. In this mode, all DPNSS
Supplementary Services get supported apart from some link-specific Traffic Channel maintenance
services.
Cisco VG30D Voice Gateway supports 2 E1 Primary Rate [2 Mbit/s (30B + D) Common Channel
Signalling] interfaces; providing a single Primary Rate conversion. The unit has been designed to be
installed on a 19-inch rack. It is particularly suited for use in Customer Premises Environments (CPE)
to interface equipment into Virtual Private Networks.
Figure 1-1 shows DPNSS PBXs interconnected across a QSIG network. In this configuration, the
combination of InterChange units and the network behave as a single DPNSS transit node and transports
DPNSS supplementary signalling.
Figure 1-1 Cisco VG30D Voice Gateway in a Private Network
Figure 1-2 shows an Cisco VG30D Voice Gateway interfacing a PBX by using the UK standard DPNSS
protocol to the QSIG/Q.931 protocol.
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