Instruction manual

HARDWARE AND SOFTWARE DETERMINATION
Additional information on analog line characteristics is in the following table.
Analog Line Circuit Packs
Feature TN742
TN769 TN746 TN746B
TN479
Number of Ports
8 8
16 16 16
Neon Message Waiting Indicators No
Yes Yes Yes
Yes
LED Terminals
Yes Yes Yes
Yes Yes
Feed Voltage -48 V -48 V -24 V -48 V -24V
Hard Bridging Yes
Yes
No Yes
No
Station Adjunct Yes
Yes
No Yes
No
Secondary Lightning Protection
Yes
Yes No
Yes
No
Same Premises—Out-of-Building Yes Yes No Yes
No
Terminals 500-Type
500-Type
500-Type 500-Type
500-Type
2500-Type 2500-Type 2500-Type 2500-Type
2500-Type
7100 Series
7100 Series
7102A* 7100 Series
7100 Series
Range With 500-Type/ 20,000 20,000 3,100 20,000
3,000
2500-Type/7102A Terminals†
Feet Feet Feet Feet
Feet
(24-Gauge Wire)
Range With 7101A/7103A
15,200
15,200 Not
15,200
Not
Terminals Feet Feet Supported Feet
Supported
(24-Gauge Wire)
Ringer Loads 3 3 3 3
3
Simultaneous Ports Ringing 4 4 4
8†
4
Ringing
* The TN746 circuit pack supports the 7102A terminal, but does not support the 7101A or 7103A terminals.
† The TN746B circuit pack allows ringing on four ports of each half of the circuit pack (for a maximum of eight
simultaneous ports ringing). A user attempting to ring one half of the circuit pack when all four ports are busy receives
the busy tone.
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