Eicon Networks Diva Server Adapters Ordering Your ISDN PRI or T1 Line

Ordering Your ISDN PRI or T1 Line 9

Ordering Your ISDN PRI or T1 Line

This chapter will assist you in ordering an ISDN PRI or a T1 line for your Diva

Server T1/PRI adapter. It provides recommended settings for a number of the

configuration settings on Diva Server T1/PRI adapters. You should specify these

settings when you order your line from your service provider.

The Diva Server T1/PRI adapters can be configured to support an ISDN PRI line

or a T1 line.

ISDN PRI

In North America and Japan, an ISDN PRI line typically supports 23 B-channels

and one D-channel. PRI configurations are used to receive multiple, simultaneous

ISDN calls from analog-modem and digital-services dial-in traffic. Another

common use of ISDN PRI is to connect a PBX (Private Branch Exchange) to a

central office switch.

Channelized T1 (robbed-bit signaling)

Robbed-bit signaling, which uses bits from specified frames in the user data

channel for signaling, fits into the in-band signaling category. In this scenario, bits

are ‘stolen’ from each channel for signaling purposes, as opposed to ISDN PRI

(out-of-band signaling) which dedicates a specific channel (D-channel) to

signaling.

In some installations, the ISDN line is connected to a PBX instead of the Diva

Server T1/PRI adapter. In these cases, you must correctly configure the PBX to

communicate with the Diva Server T1/PRI adapter.

When ordering your ISDN PRI or T1 line, make sure that a power supply is

available for the NT1 of this line. Usually, a PBX is installed in the same area as the

NT1 and the telephone company can use the power supply of the PBX for the

ISDN PRI or T1 line as well. If this is not the case, you have to order a combo

device from your local telephone company. This device consists of an installation

rack into which an NT1 module and a power supply module is mounted.