192 APPENDIX E: PROVISIONING YOUR ISDN LINE
Siemens EWSD Switch
To order ISDN service for a Siemens EWSD switch, provide the phone
company with the information in Table 36.
SPIDs When you request services, you may also need the following information
about SPIDs and other service attributes:
■ Request multipoint, initializing terminal service; the maximum number
of terminals is two. The service provider supplies you with two SPIDs.
■ If you request ISDN service from an AT&T 5ESS service provider and
the switch is running custom (or non-National ISDN 1) software, the
format is:
01 + 7-digit telephone number + 1-digit suffix.
■ If you request a different telephone numbers for each B channel, the
suffix can be the same. A suffix of 0 is typical in this case. If you decide
to use the same telephone number for both B channels, use a
different suffix so that the two SPIDs are unique.
■ If you request NI-1 (National ISDN 1) service from an AT&T 5ESS
service provider, the format is:
01 + 7-digit telephone number + 1-digit suffix + 2-digit TID (terminal
identifier).
Table 37 Ordering ISDN Service for a Siemens EWSD Switch
Required Information Specification
Line Type National ISDN 1 line
Line Code 2B1Q (2B+D)
Interface Type S/T interface with NT1 (model 43x) or
U interface (model 44x) and RJ-45 jack
Circuit-switched Option Yes
Bearer Restriction Option No packet mode data (NOPMD)
Protocol PPP
SPID suffix 1
Terminal Endpoint Identifier (TEI) Dynamic
Ring No
Maximum Keys 64
Key System (EKTS) No
Voice or Data Data
Lower Layer Compatibility Option for Data B channels
