User manual

2-8 Basic Installation and Setup

• Dynamic TEI assignment

• RJ45 connector preferred (RJ11 is acceptable)

Specify your preferred long distance provider.

Ask the type of central office switch at which your ISDN

line will terminate, and which protocol controls your calls.

❑

If your switch is AT&T 5ESS, running National ISDN-1

or Custom, request Terminal Type A.

❑

If your switch is

AT&T 5ESS Custom, note that:

The NETServer 8/16 Plus’ internal I-modems currently

support only one SPID and one DN per channel when the

central office switch runs the AT&T 5ESS Custom protocol.

The use of one SPID and one DN per channel prevents two

analog-based calls from going over the same channel at the

same time. Analog-based calls include connections to

remote modems or fax machines.

We strongly recommend that you request National ISDN-1

as your switch protocol on the AT&T 5ESS switch, if

possible. If you can’t get National ISDN-1, be sure to

request two SPIDs and two DNs from your telephone

company, for future flexibility.

❑

Northern Telecom DMS-100 switch running NT’s

“Custom” protocol

Make sure your local telephone company gives you the

following information.

• DN numbers. If the line is provisioned for voice and

data there may be a separate number for the voice-

carrying B channel.

• SPID numbers. Not all telephone companies use SPIDs

(European customers may disregard), but if so, there’ll

be one for each B-channel.

• Central office switch type and protocol

• If the switch does not auto-assign TEIs (all but the AT&T

5ESS do), then you need one fixed TEI per B-channel.