AT&T 555-600-736 manual

Contents

Main AT&T MERLIN LEGEND COMMUNICATIONS SYSTEM APPLICATION NOTES 555-600-736 MERLIN LEGEND COMMUNICATIONS SYSTEM Applications Note On Basic Trunking Concepts Abstract Page Page INTRODUCTION TO TRUNKING CONCEPTS TIP AND RING EXPLAINED LINES AND TRUNKS OPERATIONS POTENTIAL-PROBLEMS The Problem of Glare Automated Attendant Ghost Calls and Loop-Start Facilities WHEN TO USE LOOP-START TRUNKS Proper Loop-Start Facility Applications Unavoidable Loop-Start Facility Applications Cost OPERATIONS POTENTIAL PROBLEMS WHEN TO USE GROUND-START TRUNKS DIRECT INWARD DIALING (DID) TRUNKS: OPERATIONAL CHARACTERISTICS DID Trunk Signaling Characteristics Page CONSIDERATIONS IN USING DID TRUNKS WHEN TO USE DID TRUNKS TIE TRUNKS: Simple Tie Trunk Operation Tandem Tie Trunk Operation TIE LINES: Transferring Calls TIE TRUNKS: Signaling and Implementation Note: * An open circuit is preferred over battery voltage. A OFF PREMISES STATIONS Page T-1 (DS1) SERVICE Page DATA COMMUNICATIONS EQUIPMENT CHANNEL SERVICE UNIT (CSU) MULTIPLEXER (MUX) DS1 FACILITY SERVICES Page -28- T-1 ISDN x SPECIAL HOTEL/MOTEL TRUNKS MAINTENANCE AND TROUBLESHOOTING HARDWARE -31- Page -33- Page ADMINISTRATION CONSIDERATIONS