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