Chapter 2
Ordering ISDN
ISDN is a complex service with many network options. Obtaining service from the local telephone company and long distance providers can be compli- cated.
The following instructions only apply to North American switches.
In North America, the development of ISDN Ordering Codes (IOCs) simplifies the process of ordering ISDN service. The ISDN Solutions Group, a consor- tium of ISDN equipment vendors, service providers, and Bellcore, established these codes to represent predetermined line configurations for ISDN Basic Rate service for specific applications.
ADTRAN and Bellcore have registered and tested eight generic IOCs. These IOCs are supported by all major local exchange carriers as well as several in- dependent carriers.
Capability S (previously Generic Data M) ordering code is recommended for ISU 512 applications. It is the most
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