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Shiva ISDN Line Provisioning Information

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Part Number: 990-0358-00
Revision A


This document provides information to ensure successful use of the BRI module

using ISDN. It covers:

  • Directory numbers
  • Line Codes
  • ISDN order codes
  • Terminal Types

For BRI module installation and configuration information, refer to the BRI Module Guide. This document describes how to correctly provision your ISDN


Note that when you plan to implement an ISDN service at your site, plan for 3 to 8 weeks to have your ISDN lines installed and provisioned properly.

Directory Numbers

A directory number is the address or telephone number for the ISDN line assigned by your service provider. Each ISDN line receives one telephone number, known as the Primary Directory Number. Depending on the service offered by your service provider, you may also receive a second directory


Your service provider must provide you with the telephone number(s) assigned to your two B channels, including your service profiles (SPIDs). Note that SPIDs are not required for AT&T Custom Basic Rate ISDN services.

The following table shows each supported switch type:

  • AT&T; 5ESS Custom
  • AT&T; 5ESS NI-1
  • AT&T; 5ESS NI-2
  • NT DMS-100 NI-1

If you are using AT&T; Custom Basic Rate ISDN, make sure your service

provider has provisioned a Point-to-Point terminal.

In order to aggregate B channels most efficiently and reliably, it is preferable for all B channels on the same interface to share the same telephone number. This service, sometimes called hunt grouping can be supplied by your service provider.

Service Profile Identifiers (SPIDs)

When you order an ISDN service, your service provider needs to know the ISDN features you require. This is known as a service profile. Depending on the switch you use, your service provider then allocates you a unique

Service Profile Identifier, or SPID.

SPIDs have different formats depending on the type of switch you are connecting to and the variant of ISDN you are using. SPIDs are usually based on the ISDN telephone number with additional digits before or after the number.

Depending on your ISDN service, you will either have none, one or two SPIDs assigned:

Switch Type                  Allocated SPIDs                  
AT&T; 5ESS Custom             None                             
AT&T; 5ESS NI-1               One per device                   
AT&T; 5ESS NI-2               One per device                   
NT DMS-100 NI-1              One per device                   

ISDN Order Codes

ISDN order codes are a way of telling your service provider the specific ISDN services and features you require at your site. Each ISDN order code (IOC) refers to a particular set of features:

ISDN Order Code              Services and Features            
B                            One B channel, provisioned as    
                             data and including calling       
                             line identification (Caller ID)  
R                            Two B channels, provisioned as   
                             data and including calling       
                             line identification (Caller ID)  
S                            Two B channels, provisioned as   
                             data or voice                    


BRI module supports order codes:

R (Two B channels for data)

Terminal Types

Terminal equipment such as ISDN telephones or fax machines are sometimes described as being of Terminal Type A, B, C or D, depending on the type of

services the equipment offers.

For the BRI module, specify Terminal Type: A

Excluding Interfering Services

Line provisioning must not only include supporting services, it should also exclude interfering services. For example, if the telephone company simply removes the billing charges for an unwanted service without removing the service itself, that service might interfere with the operation of the BRI

module. The following services are not supported by Terminal Type:A devices:

  • Multiple call appearances
  • Hold conference, drop
  • Intercom groups
  • Electronic Key Telephone Sets (EKTSs)
  • Modem pools
  • Multiline hunt groups
  • Shared directory numbers
  • Packet Mode Data (over the D channel)
  • Message waiting

Make sure you exclude the preceding services when you order and provision your

ISDN service.

See Also