Version 6.6
293
October 2014
Installation & Operation Manual
32. V5.2 Access Gateway
32
V5.2 Access Gateway
32.1
Overview
V5.2 is a standardized protocol suite for the connection of Access Networks (AN) to
the Local Exchange (LE) usually implemented in a traditional PSTN Class-5 switch.
V5.2 Access Gateway application implements the LE side of the V5.2 protocol. It
aggregates legacy circuit-switched voice from the subscriber side, converts V5.2
protocol messages to H.248 IP protocol and then hands them off to a softswitch and
vice versa. The gateway and the softswitch may be used as a replacement for
traditional Class 5 PSTN switch.
The V5.2 Access Gateway application implemented on the Mediant 8000 has the
following capabilities:
Support for E1 trunks on TP-8410 Media Gateway boards only.
Supported by the Mediant 8000 redundancy mechanism (refer to Working with
Media Gateway boards -> Redundancy Model for details).
V5.2 Links: each TP-8410 board features 42 E1 trunks that may be configured as
V5.2 links or as E1 transparent trunks (without voice – e.g. for PSTN clock
synchronization).
V5.2 Interfaces: the E1 trunks, configured as V5.2 links, are divided into groups
or V5.2 interfaces of 2-16 E1s each. Up to 30 V5.2 interfaces are supported.
Signaling Channels: a V5.2 interface uses 2 timeslots for signaling (active and
standby) in separate V5.2 links called Primary and Secondary links (Protection
Group). In both signaling links, the timeslot 16 is dedicated to the V5.2 signaling.
Under normal circumstances, a V5.2 interface starts up with the signaling on the
Primary link.
Voice Channels: in all V5.2 links, timeslots 1 to 31 (except for timeslot 16 in
signaling links) are used as voice channels.
User Ports: each TP-8410 board supports up to 10,000 PSTN user ports
distributed across the V5.2 interfaces; the number of user ports per V5.2 interface
is determined by the following formula: 300 * "Number of Trunks" – e.g. if the
V5.2 interface has 16 trunks – up to 4800 user ports may be defined on it.
Summary of Contents for Mediant 8000
Page 2: ......
Page 33: ...Part I Hardware Overview This part describes the hardware overview of the Mediant 8000 chassis...
Page 34: ......
Page 90: ......
Page 158: ......
Page 264: ......
Page 546: ......
Page 775: ...Part VI Maintenance This part describes the Mediant 8000 maintenance procedures...
Page 776: ......
Page 834: ......
Page 879: ...Part VIII Appendices This part describes additional Mediant 8000 configuration procedures...
Page 880: ......
Page 924: ...Media Gateway Mediant 8000 www audiocodes com Installation Operation Maintenance Manual...