ISDN connections and standards and the TANDBERG Codian ISDN GW

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Updated:April 23, 2015

Document ID:112304

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Introduction

ISDN connections and standards and the TANDBERG Codian ISDN GW

Related Information

Introduction

This article relates to the Cisco TelePresence ISDN GW 3241 and Cisco TelePresence ISDN GW MSE 8321 products.

Q. ISDN connections and standards and the TANDBERG Codian ISDN GW

A. This article includes the following information:

Supported ISDN standards

Provisioning an ISDN connection

Troubleshooting ISDN call problems

Supported ISDN standards

T1 PRI circuits

The Codian ISDN GW 3200 and 8320 Series support:

NI-2

The Codian ISDN GW 3201 and 8321 Series support:

NI-2

DMS-100 (software version 1.5 and later)

4ESS (software version 1.5 and later)

E1

Only Euro ISDN is supported.

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Provisioning an ISDN connection

It is recommended that your ISDN connection has the following characteristics:

PRI: The size of the DID range that you specify for your PRI depends only on the number of different endpoints or destinations on your local network. For example, if you have 100 endpoints on your network, you would get one DID number for each one, and would need to set up dial plan rules on your IDSN Gateway to map DID numbers to endpoints

US: NI-2; DMS-100 (only applicable to ISDN GW 3241 and MSE 8321); 4ESS (only applicable to ISDN GW 3241 and MSE 8321). Europe: ETSI

B8ZS encoding

Extended super frame

CSU is recommended in the US (we have tested with the Adtran CSU products)

We derive the clock from the ISDN provider

64k ISDN line or 56k (restricted - from software version 1.5 we now support 56k restricted/bit robbing). For more information see Do TANDBERG Codian ISDN gateways support 56k (restricted or bit-robbed) channels?

Support for data, video and voice

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Troubleshooting ISDN call problems

If you are having trouble making calls on your ISDN GW:

Go to Status > ISDN.

Check that both Layer 1 and Layer 2 show up for the attached PRI.

If these fields are correct but outgoing calls are failing to reach their destination:

Go to Settings > ISDN.

Set National bits (Sa4Sa8) to 01000.

Reboot the ISDN GW.

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