Details about Ordering ISDN Service

5ESS Custom Switch (AT&T)

DMS-100 Switch (NORTEL)

NI-1 Switch (supported by AT&T and NORTEL switches)

If your telephone company asks for specific information about the type of ISDN service you want, find out from them which ISDN switch type they support.

In North America, common switches are the 5ESS custom, DMS-100, and the NI-1. Information about the capabilities to order for these switches is given below.

In Europe, common switches are basic-net3, 1TR6, and VN3. Normally, you should be able to order ISDN service without needing to specify switch capabilities.

5ESS Custom Switch (AT&T)

For data service only, order the following capabilities:

2 B channels for data
Point-to-point connection
Terminal type E
1 directory number assigned by the telephone company
MTERM = 1
Request delivery of calling line ID on Centrex lines
Set speed of calls to 56 kbps outside the local exchange

If you have a voice device (that is, an ISDN telephone) connected to the line, you can order voice and data service with the following capabilities:

2 B channels for voice or data
Multipoint connection
Terminal type D
2 directory numbers assigned by the telephone company
2 SPIDs assigned by the telephone company, in the format 01xxxxxxx0, where the xxxxxxx is replaced with the seven-digit telephone number (omitting the area code)
MTERM = 2
Number of call appearances = 1
Ringing/idle call appearances = idle
Autohold= no
Onetouch = no
Request delivery of calling line ID on Centrex lines
Set speed of calls to 56 kbps outside the local exchange
(Optional) Directory number 1 can hunt to directory number 2 (this service is more expensive)

DMS-100 Switch (NORTEL)

Order the following capabilities:

2 B channels for voice and data
2 directory numbers assigned by the telephone company
2 SPIDs assigned by the telephone company
Functional signaling
Dynamic TEI assignment
Maximum number of keys = 64
Release key or key number = no
Ringing indicator = no
EKTS = no
PVC = 1, for all BCS loads up to BCS 34 (note that a PVC of 2 indicates an NI-1 switch)
Request delivery of calling line ID on Centrex lines
Set speed of calls to 56 kbps outside the local exchange
(Optional) Directory number 1 hunt to directory number 2 (this service is more expensive)

NI-1 Switch (supported by AT&T and NORTEL switches)

Order the following capabilities:

2 Bchannels for voice and data
2 directory numbers assigned by the telephone company
2 SPIDs assigned by the telephone company (format will vary)
Terminal type = A
Set speed of calls to 56 kbps outside the local exchange
(Optional) Directory number 1 hunt to directory number 2 (this service is more expensive)

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