Instruction manual

HARDWARE AND SOFTWARE DETERMINATION

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.