AT&T Telephone DS1/DMi/ISDN-PRI Uživatelský manuál stáhnout pdf (Strana 253)

ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1

7-117

Location A display-only field specifying the carrier and slot of the DS1 Interface.

Name The name as assigned on the network diagram.

Line Refers to the distance between the switch and the network channel-terminating

equipment (NCTE), CDM, CEM, DSX-1 cross-connect, T1 office repeater, or

other equipment. The compensation setting is for the total distance between the

switch and the endpoint. Table 7-13, Line Compensation Values, summarizes

Compensation

compensation.

TABLE 7-13. Line Compensation Values

Compensation Value Distance (Feet)

000 to 133

133 to 266

266 to 399

399 to 533

533 to 655

NOTE: Compensation values assume 22-gauge ABAM or 24-gauge PDS

cables. Two colocated switches can be up to 1310 feet apart with compensation

on both systems set to the maximum values. If 26-gauge PDS cables are used,

distances are reduced as shown in table 3-1, System 85 Traditional Module

Equalizer Settings (Metallic Cable).

The T1 office repeaters or T1 line repeaters can be used when the on-premises

distance limitation is exceeded. A T1 office repeater is required at each end of the

connection to provide an interconnection range of up to 3000 feet. Each repeater

only provides regeneration for the receive direction. The T1 line repeaters can be

used to accommodate distances up to 6000 feet between switches. The T1 line

repeaters can be used in tandem to accommodate greater distances.

Zero Code

Specifies the line coding format (ZCS or B8ZS) that will be used to forcibly ensure

Suppression that the data meets T1-carrier ones-density requirements. The choice of data rates,

communications protocol, and facility requirements discussed under System 85

procedure 260, field 9, also apply here.

Framing

The choices are D4 or ESF (previously referred to as F

). The network diagram

Mode

should show the choice for the particular DS1/T1-span. The other end and all

intermediate equipment should be optioned accordingly.

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AT&T Telephone DS1/DMi/ISDN-PRI Uživatelský manuál Strana 253