AT&T DEFINITY 7100 series Bedienungsanleitung PDF herunterladen (Seite 105)

TRUNK SPECIFICATIONS

TRUNK CIRCUIT SPECIFICATIONS

TYPE

PACK

Central

TN747

Capacity:8 Circuits

Office (CO)

Transmission: 1-Way In, 1-Way Out, or

2-Way 2-Wire 600 Ohms or

RC Balance Network

Signaling: Ground Start or Loop Start

Auxiliary

TN763 Capacity: 4 Circuits

Trunk

Transmission: 1-Way In, 1-Way Out,

or 2-Way 2-Wire

Signaling: Loop Start on Tip and Ring;

Two Additional Pairs Provide Seizure

and Answer Supervision and/or Make

Busy Information

Direct Inward

TN753

Capacity: 8 Circuits

Dialing (DID)

Transmission: 1-Way Incoming Fixed

Impedance to DID Trunk

Signaling: Wink or Immediate Start

Accepts Touch-Tone Dialing

Tie Trunk

TN760

Capacity: 4 Circuits

Transmission: 4-Wire Tip and Ring

Signaling: E&M signaling.

DS1 Trunk

TN722 Capacity: 24 Trunks for Voice Grade

Service 23 Trunks for Alternate

Voice/Data Service or DMI, One Trunk

Used for Signaling.

Mode: Multiplexes 24 or 23 Trunks

onto 1 Facility and Demultiplexes 1

Facility into 24 or 23 Trunks

Speed: Trunks at 64 kbps,

1 Facility at 1.544 Mbps

Signaling: DS1 Over 4-Wire

100

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