Telos Zephyr, User Manual

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Section 10 ADVANCED PROBLEM SOLVING
186
The telephone company should have given you the ISDN protocol when the line was
ordered. If you find yourself in the field without this information, it is usually possible to
piece together what you need.
•
If you are given SPIDS, you probably have Natl ISDN 1. One SPID means one
channel was activated, rather than the usual two. You won’t be able to make a
stereo connection.
•
No SPIDs and only one phone number generally means AT&T PTP. However;
•
Sometimes the telco will give you a SPID even when you have PTP. If so, disregard
it.
SPIDS beginning with 01 mean you are on the AT&T 5ESS switch. A SPID of
01YYYZZZZ0 generally means that you have PTP. If you have 2 SPIDS with this format
suspect that you may have Custom Point- to- Multipoint (PMP) which is not supported
by the Zephyr (but see below). 2 SPIDS which look like 01YYYZZZZ000 means you
probably have Natl ISDN 1. National ISDN SPIDS can take other forms as well.
•
In Europe, you have either NET3, EuroISDN or an older protocol, such as ITR6 in
Germany or VN2 in France. The Zephyr only works with EuroISDN although it may
work with NET3.
If required, carefully verify that you have the correct SPID from the Telco, and that you
ISDN TIP!
If your Telco did not properly follow the ordering information
you sent them from the appendix of this manual (you did use
that information, didn’t you?) they may have given you a 2 B-
channel AT&T “Custom Point to Multipoint” line with 2 phone
numbers and 2 SPIDS. Zephyr does not support this
configuration. However, in an emergency, to save a remote,
you can usually get things working (temporarily) as follows:
1. Remove both SPIDS and both directory numbers
2. Set Telco to PTP
3. Have another Zephyr call either of your phone numbers
twice. They should be able to connect.
4. The line will now function normally for outgoing calls until
Zephyr is rebooted or the ISDN connection is reinitialized.
ISDN TIP!
If your Telco did not properly follow the ordering information
you sent them from the appendix of this manual (you did use
that information, didn’t you?) they may have given you a 2 B-
channel National ISDN line with only one SPID and one phone
number. This may work, however you will need to proceed as
follows:
1. Enter the SPID they gave you as SPID 1
2. Enter your 7-digit directory number twice as both Directory 1
and Directory 2