AT&T DEFINITY 7100 series Bedienungsanleitung PDF herunterladen (Seite 73)

CONTROL CIRCUIT PACKS

Tone Detector (TN420C) —

non-US Installations

The TN420C can be administered to detect and analyze tones on

the TDM bus. The TN420C has two network processing elements

(NPEs) with eight channels that provide the following: four dual tone

multifrequency receiver (DTMF) ports, two general purpose tone

detector (GPTD) ports, and two digital loop-around ports.

Tone Detector TN748C

The TN748C has four touch-tone receivers and two general-

purpose tone receivers that detect the following: call progress

tones, modem answer-back tones, transmission test tones, and

noise. Also provides detection required for the following: Automatic

Route Selection (ARS), off-premises (out-of-building) keyboard dial-

ing, and off-premises abbreviated dialing.

Tone Detector/Generator TN756

(single-carrier cabinet)

Provides four touch-tone receiver ports, two tone detector ports,

tone generation, and clock generation It is used instead of TN768

and TN748C in systems without DS1, EPN, or DO.

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AT&T DEFINITY 7100 series Bedienungsanleitung Seite 73