AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 72)

CONTROL CIRCUIT PACKS

Tape Drive TN1656

The TN1656 stores the software information for the system. It con-

tains a tape drive that provides 120 Mb of storage space and pro-

vides an LED that monitors the activity of the tape drive.

Tone-Clock (TN419B) — non-US Installations

The TN419B supplies call progress tones, touch tones, answer-

back tones, and trunk transmission test tones. The TN419B pro-

vides 2 MHz and 160 kHz clocks, and the 8 kHz frame clock. This

circuit pack can transmit the system clock and tones on either TDM

bus A, TDM bus B, or both TDM bus A and TDM bus B. This cir-

cuit pack contains a ring voltage alarm detection circuit.

Tone-Clock TN768 (standard in multicarrier

cabinet—optional in single-carrier cabinet)

Supplies timing, which includes Stratum 4 timing, to the port net-

work in which it resides. It also provides the following tones: call

progress, touch-tones, answer-back, and trunk transmission test.

The TN768 provides the following clocks: 2 MHz, 160 kHz, and

8 kHz.

Tone-Clock TN780 (G3V2)

Connects to an optional Stratum 3 clock and monitors it. It also

couples the Stratum 3’s output to local clocks.

The TN780 provides the following tones: call progress, touch-

tones, answer-back, and trunk transmission test. It also provides

the following clocks: 2 MHz, 160 kHz, and 8 kHz.

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 110 111

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AT&T DEFINITY 7100 series Manual de usuario Pagina 72