ADTRAN ISU 2X64 user manual Chapter Isdn Service, Isdn Ordering Codes

Chapter 2

ISDN Service

ISDN ORDERING CODES

ISDN is a complex service with many network options. Obtain- ing service from the local telephone company and long distance providers can be complicated.

In North America, the development of ISDN ordering codes (IOCs) simplifies the process of ordering ISDN service. The ISDN Solutions Group, a consortium of ISDN equipment vendors, ser- vice 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 car- riers as well as several independent carriers. After reviewing the following list, order ISDN lines from the local service provider.

Request the appropriate IOC for your application. If the local ser- vice provider does not support IOCs, see Ordering ISDN Without IOCs on page 125.

Capability S (previously Generic Data M) ordering code is rec- ommended for 2x64 applications. It is the most feature-rich and supports most voice and data applications. The voice capability is not necessary for ISU operation in 2x64 in data-only applica- tion, however it is useful in troubleshooting a mis-configured ISDN line. In some areas, ISDN tariffs may warrant the use of ordering codes with less features. For example, in a particular region, there may be additional monthly expense associated with having voice service on each B channel. If you have a data-only

61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 9