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Appendix E - Establishing ISDN Cable
Connections
This appendix explains the basic principles of ordering ISDN service and
establishing a connection between the Dialogic Digital Network Interface boards
and the Network Termination Unit (NTU).
Ordering Service
When ordering your ISDN service from a carrier, keep the following points in
mind when talking to a service representative:
• Be specific when describing the kinds of service options you want. Your
carrier may offer options that the carrier representative did not mention.
• Find out as much as you can about details of the turn-up process.
• Be sure to find out which aspects of service your carrier is responsible for and
which aspects are your responsibility. Carriers may offer end-to-end
coverage, or responsibility for the lines may lie with several different
companies. Not knowing who to contact in the case of difficulties can delay
repairs and impact productivity.
• Have the manufacturer's name, equipment numbers, and equipment
registration numbers for the customer-site equipment you are installing or
have installed.
You may want to consider hiring a third-party telecommunications or telephone
consultant to coordinate service with a carrier. Or, you might delegate parts of the
service acquisition process to others. Though these options may involve additional
costs, the installation process is streamlined as a result of enlisting the help of
someone knowledgeable about the service-ordering procedure.
Establishing Connections to an NTU
The Network Termination Unit (NTU) is usually the first piece of equipment on
the customer premise that connects to the ISDN line. Customer equipment must be
cabled to the NTU. Dialogic does not supply a board to NTU cable. You must