AT&T 555-600-736 - Manual

AT&T 555-600-736

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Table of Contents:

  • Page 4 – INTRODUCTION TO TRUNKING CONCEPTS; Planning Guides, as well as the Systems Reference Manual.; TIP AND RING EXPLAINED; and the Sleeve called “Ring.”
  • Page 5 – LINES AND TRUNKS
  • Page 6 – OPERATIONS; provides dial tone for an outgoing call.
  • Page 7 – The Problem of Glare; signaling that a line is being seized.
  • Page 8 – Automated Attendant Ghost Calls and Loop-Start Facilities; ringing phone and hear dial tone.
  • Page 9 – WHEN TO USE LOOP-START TRUNKS; facilities and when you must use loop-start facilities.; Proper Loop-Start Facility Applications; Some PBXs, especially those that cannot be; Unavoidable Loop-Start Facility Applications; The Centrex is no longer capable of providing efficient internal; facilities are always preferred.
  • Page 10 – Cost; loop-start trunks when the key system is replaced by a PBX.
  • Page 11 – signal when one party disconnects.
  • Page 12 – POTENTIAL PROBLEMS; outperform a properly functioning loop-start trunk.; WHEN TO USE GROUND-START TRUNKS; They offer the following major benefits:
  • Page 13 – OPERATIONAL CHARACTERISTICS; analogy to the residential service in your your home.
  • Page 14 – DID Trunk Signaling Characteristics; Types of Loop Reverse-Battery Signaling
  • Page 15 – The following are administrable on a trunk basis:
  • Page 16 – CONSIDERATIONS IN USING DID TRUNKS
  • Page 17 – WHEN TO USE DID TRUNKS; options of the LEGEND system.; Simple Tie Trunk Operation; interchangeably. This type of facility links two PBXs.
  • Page 18 – Tandem Tie Trunk Operation; talk to an outside supplier in the Los Angeles area.
  • Page 19 – when the trunk group is administered, and is usually the attendant.
  • Page 20 – The transmit and control signals for each signaling type are:
  • Page 21 – OFF PREMISES STATIONS
  • Page 22 – System Reference Manual.
  • Page 23 – OVERVIEW AND OPERATIONS; Communications System interfaces with ISDN-PRI.
  • Page 24 – Potential Problems/Limitations
  • Page 25 – DATA COMMUNICATIONS EQUIPMENT; channels are not a primary concern.
  • Page 26 – and transmits them to the DTE. The CSU has three primary uses:
  • Page 28 – DS1 FACILITY SERVICES
  • Page 30 – ISDN
  • Page 31 – SPECIAL HOTEL/MOTEL TRUNKS; OPERATION OVERVIEW; each time a guest makes a call.; MAINTENANCE AND TROUBLESHOOTING; reference guide to use when difficulty occurs.
  • Page 32 – HARDWARE
  • Page 36 – 91A Power supply module
  • Page 37 – ADMINISTRATION; appropriate forms to the NSAC.; CONSIDERATIONS; setting for the disconnect signal from the CO.
  • Page 38 – R E F E R E N C E S
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AT&T

MERLIN LEGEND™

COMMUNICATIONS SYSTEM

APPLICATION NOTES

MERLIN LEGEND™ COMMUNICATIONS SYSTEM

Applications Note On Basic Trunking Concepts

Abstract

This Application Note describes the various types of trunks that link the MERLIN LEGEND

Communications System with the telephone network. Operating characteristics of the various trunks are

shown to be a function of both the trunk type and the capabilities of the LEGEND system hardware and

software. The Note is designed to help Account Executives and System Consultants, so a basic approach

to the subject is used. The concepts covered also apply to other customer premises switching equipment as

well as the MERLIN LEGEND CS.

This Application Note is designed for use as a reference manual.

Refer to it each time you get involved with a MERLIN LEGEND system sale requiring a mixture of the

various types of lines and trunks.

MERLIN is a registered trademark of AT&T.

DIMENSION is registered trademarks of AT&T.
MERLIN LEGEND is a trademark of AT&T.

MERLIN MAIL is a trademark of AT&T.
MLX-10, MLX-10D, MLX-10L MLX-28D are trademarks of AT&T.

ACCULINK is a trademark of AT&T.
ACCUNET is a trademark of AT&T.

Copyright January 1992, AT&T

555-600-736

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Summary

Page 4 - INTRODUCTION TO TRUNKING CONCEPTS; Planning Guides, as well as the Systems Reference Manual.; TIP AND RING EXPLAINED; and the Sleeve called “Ring.”

- 2 - INTRODUCTION TO TRUNKING CONCEPTS The way lines and trunks have been used to meet customers’ needs over past decades is rapidly changing. T-1, ISDN technology, fiber optics, and other advances in telecommunications are forcing us to rethink what lines and trunks should be used for a PBX or Key...

Page 5 - LINES AND TRUNKS

- 3 - LINES AND TRUNKS Telephone lines and telephone trunks are facilities that carry voice or data communications. They are similar in form and function, and the two terms are usually treated as if they are interchangeable. The fundamental difference between a line and a trunk is that a line connec...

Page 6 - OPERATIONS; provides dial tone for an outgoing call.

- 4 - LOOP-START TRUNKS: OPERATIONS Loop-start facilities are the simplest and most common end-user facilities in the nation-wide telephonenetwork. Loop-start facilities provide virtually no supervision between the central office and the customer premises equipment (CPE). For this reason, loop-start...

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