Vertical SBX IP 320 Service Manual download pdf (Page 155)

ISDN Service 145

SBX IP 320 Features & Operation Guide

ISDN Service

The SBX IP 320 system does not support Basic Rate Interface (BRI) Integrated Services Digital

Network (ISDN) circuits. The BRI provides two bearer channels and one data channel (2B+D),

but for the Calling Line ID function, the same admin fields are used as ISDN.

Calling Number and Called Number services are supported. Calling Number services will be

routed in the same way as ANI (automatic number identification) calls using the DID route

table.

The rules and conditions of ANI are the same, and still apply to Calling Number service on

ISDN lines. Called Number services will be routed using the DID route table. The rules and

conditions of DID and still apply to ISDN Called Number service on ISDN lines.

• The bearer channels (B channels) transport voice information to and from the Central

Office.

• The data channel (D channel) controls all signaling information for the bearer channels.

Calling Line Identification Presentation (CLI)

CLI is the telephone number of the caller. By using this, the SBX IP 320 station user can

recognize the incoming CO caller's information and send the telephone number of the caller

when he makes an outgoing CO call.

Incoming CLI Service

When a station of the SBX IP 320 system receives an incoming CO call that has a telephone

number of the caller, the station user can see the telephone number of incoming CO caller on

the LCD.

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Vertical SBX IP 320 Service Manual Page 155