BCM50 to Mediatrix® Direct Gateway V1.0 June 2006
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External Distribution NORTEL
1. Overview: BCM50 to Mediatrix ® Analog Gateway
in a Direct Gateway Environment
Analog gateways are becoming more of a necessity in the enterprise to provide faxing capabilities over Voice Over
IP (VoIP) networks. The gateway handles the responsibility of transcoding the analog call to IP using VoIP
standards. These gateways interoperate with core VoIP telephony servers.
For the purpose of this document the Mediatrix ® 1102 ® was utilized as the analog gateway and the Nortel
Business Communications Manager 50 was utilized as the VoIP telephony server. This document is intended to
be a Technical Configuration Guide to show a working configuration utilizing the Mediatrix ® gateway and the
Nortel BCM50 to allow analog devices to make calls across the VoIP network.
The solution utilizes the tandem capabilities of the BCM50 to allow incoming calls to be routed from one trunk, in
this case a PRI, to a VoIP trunk terminating on a Mediatrix ® 1102 ® gateway.
2. Base Scenario:
The BCM400 was connected to the BCM50 to emulate an external switch. The analog gateway was configured to
utilize a direct IP trunk back to the BCM50 over the Ethernet network. Only one port on the Analog gateway was
configured with an alias, in this case a phone number.
The Enterprise Switch 470 was configured with a basic IP address for management as well as an interface group
to trust the incoming Diffserv Code Point (DSCP).
2.1 Assumptions:
This document assumes that the reader is knowledgeable on the programming of the BCM50. It does not go into
detail on any basic configuration options. The document focuses on the necessary configuration to make the
tandem function work with H.323 trunks to the analog gateway.
All IP components have to be accessible so that signaling and media path can connect appropriately.
The BCM50 will need to have the VoIP trunk license key loaded to support the H.323 connectivity to the analog
gateway. VoIP trunks are assigned to a BLOC. In this configuration BLOC A is used for the VoIP trunks.
The one BCM50 is configured in a Pool, in this case BLOC B.
Since the Mediatrix® is on the LAN side, only G.711 mu-law will be utilized. T.38 Fax support will be disabled.
(18 pages)
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