Section 15 APPENDICES
250
lines, without regard for such arcana as 5ESS, DMS100, CSV/CSD, SPIDs, etc.
Unfortunately, the ISDN “standard” has been evolving for the past years and has only
recently begun to settle down.
At their central offices, the telephone companies use either AT&T 5ESS, Northern
Telecom DMS100, or Siemens EWSD switching equipment. While each will work with
the Zephyr, there are some differences which need to be taken into account when lines
are ordered and used. Each has a “protocol” – the language the user equipment and the
telephone network use to converse (on the D channel) for setting up calls and the like.
There is a standard protocol which all switches may provide, called National ISDN 1
(NI- 1). This protocol was standardized and specified by Bellcore, the technical lab
jointly owned by the phone companies. However, both AT&T and Northern Telecom
had “custom” versions of ISDN which predated the NI- 1 standard and some switches
have not been upgraded to the new format.
There is also a newer NI- 2 and NI- 97 standards, but they are designed to be compatible
with NI- 1 for all of the basic functions.
SPIDs
Service Profile IDentification (SPID) numbers are required in all but one the AT&T
protocols. This number is given to the user by the phone company and
must be entered
correctly
into the Zephyr in order for the connection to function. SPIDs usually consist
of the phone number plus a few prefix or suffix digits. There is frequent confusion
between phone numbers and SPIDs, even among telco personnel. While the SPID
frequently includes the corresponding phone number, this is not necessarily the case.
The intention of the SPID is to allow the Telco equipment to automatically adapt to
various user requirements by sensing different SPIDs from each type or configuration of
user terminal. None of this matters with our application, but we must enter the SPIDs
nevertheless. BellSouth has proposed, and most of the other telephone companies have
agreed to implement, a standardized SPID for new National ISDN installations. They
announced this would be phased in during 1996. As of this writing, it has generally
been implemented by most telcos. The standard is area code+phone 0101
(XXXYYYZZZZ0101).
Unless you are using the AT&T PTP protocol, your Telco service representative should
give you one SPID for each B channel you order.
Don’t let the phone company installer
leave without providing you with the phone numbers of your B channels (called Directory
Numbers, or DNs) and your SPIDs!
CSD and CSV
Recall that each ISDN BRI has two possible B channels. It is possible to order a line with
one or both of the B channels enabled – and each may be enabled for voice and/or data
use. Phone terminology for the class of service is CSV for Circuit Switched Voice and
CSD for Circuit Switched Data. (In contrast to PSD, Packet Switched Data, which is
possible but irrelevant to our needs.)
CSD is required for Zephyr connections. Even though you may be sending voice, the
codec bit- stream output looks like computer data to the phone network.
Summary of Contents for Zephyr
Page 13: ...Table of Contents 13 SECTION 1 QUICK RESULTS ...
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Page 27: ...Section 2 INTRODUCTION 27 SECTION 2 INTRODUCTION ...
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Page 39: ...39 SECTION 3 ZEPHYR AT A GLANCE ...
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Page 53: ...Section 4 INSTALLATION BASIC OP 53 SECTION 4 INSTALLATION BASIC OPERATION ...
Page 84: ...Section 4 INSTALLATION BASIC OPERATION 84 ...
Page 85: ...Section 5 ISDN 85 SECTION 5 ISDN ...
Page 105: ...Section 6 NON ISDN NETWORKS 105 SECTION 7 AUDIO CODING ...
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Page 119: ...Section 8 DETAILED MENU REFERENCE 119 SECTION 8 DETAILED MENU REFERENCE ...
Page 157: ...Section 9 REMOTE CONTROL 157 SECTION 9 REMOTE CONTROL ...
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Page 177: ...Section 10 ADVANCED PROBLEM SOLVING 177 SECTION 10 ADVANCED PROBLEM SOLVING ...
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Page 197: ...Section 11 TECHNICAL INFORMATION 197 SECTION 11 DETAILED TECHNICAL INFORMATION ...
Page 219: ...Section 12 SCHEMATICS 219 SECTION 12 SCHEMATICS ...
Page 221: ...Section 13 MANUFACTURER S DATA SHEETS 221 SECTION 13 MANUFACTURER S DATA SHEETS ...
Page 223: ...Section 14 SPECIFICATIONS WARRANTY 223 SECTION 14 SPECIFICATIONS AND WARRANTY ...
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Page 229: ...Section 15 APPENDICES 229 SECTION 15 APPENDICES ...