AT&T DEFINITY 7100 series Manual de usuario descargar pdf (Pagina 80)

PORT CIRCUIT PACKS

Auxiliary Trunk (TN417) —

non-US Installations

The TN417 provides four ports for on-premises trunk applications

such as Music-on-Hold, Loudspeaker Paging, Code Calling, and

Recorded Telephone Dictation Access. The TN417 supports Audi-

chron® announcement equipment. TN417 hardware and firmware

are identical to that in the TN763C, except that the TN417 has A-

law companding on the pulse code modulation (PCM) signal and the

TN763C has µ-law companding on the PCM signal.

Each port has the following signal leads: T, R, SZ, SZ1, S, S1.

Auxiliary Trunk (TN763B, C, and D)

The TN763B, C and D has four ports used for on-premises applica-

tions such as: music-on-hold, loudspeaker paging, code calling, and

recorded telephone dictation access. The TN763C supports

recorded announcement equipment. The TN763D can be admin-

istered to select A-law or µ-law companding. Each port has the fol-

lowing signal leads: T, R, SZ, SZ1, S, and S1.

CO Trunk Circuit Pack (TN438B) —

non-US Installations

●

The TN438B provides eight ports for loop-start CO trunks and has

the following attributes:

●

Detection of 12Khz and 50Hz periodic metering pulses

sent from the CO

●

Call still held timing

Automatic guard fault detection circuitry

Each port has the following signal leads: T, R.

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AT&T DEFINITY 7100 series Manual de usuario Pagina 80