rut

northern

tukcom

PRACTICE 553-2201-183
Issued: 88 08 10
Standard
INTEGRATED SERVICES NETWORK

MERIDIAN

SL-i.

500/2500
LINE PACKS
DESCRIPTION AND OPERATION
CONTENTS
PAGE
1.
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.._.....
1-1
2.
DESCRIPTION
2-1
3.
APPLICATION 3-1
4.
CHARACTERISTICS 4-1
Functional
..,.,....._..,,
,,.
_.,.
4-1
Technical Summary 4-3
Limitations 4-4
Power Requirements 4-4
Environmental
4-6
Foreign and Surge Voltage Protection 4-6
Overload Level 4-6
5.
OPERATION 5-1
Idle Circuit State 5-l
Call Originated from a
500/2500
Telephone
5-1
Call to Telephone 5-2
Message Waiting Lamp Operation 5-3
Ground Button Operation 5-4
Class of Service and Features 5-5
Reason for Reissue: This practice is reissued to include
information related to the QPC789
16-Port
Message Waiting
c
500/2500
Line circuit pack. Changes are indicated by margin arrows.
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Prlnred
Iā€
LISA
ā€™
Northern
T&corn
1983 Page i
1 Page