AT&T Telephone DS1/DMi/ISDN-PRI Uživatelský manuál stáhnout pdf (Strana 77)

100

101

DS1 TRANSMISSION AND CABLING

3-5

DS1

655 FT

MAXIMUM

655 FT

MAXIMUM

DSX-1 PHANTOM POINT

A. DIRECT DISTANCE OF 1310 FT OR LESS

NCTE

DSX-1

DS1

OFFICE

REPEATER

OFFICE

REPEATER

DS1

655 FT

MAXIMUM

655 FT

MAXIMUM

3000 FT OR LESS

B. DISTANCE OF 1311 FT TO 4310 FT

DSX-1

DS1

NCTE

T1 LINE

REPEATER

655 FT

MAXIMUM

3000 FT OR LESS

6000 FT OR LESS

DSX-1

DS1

NCTE

T1 LINE

REPEATER

655 FT

MAXIMUM

3000 FT OR LESS

C. DISTANCE OF 4311 OR MORE

Figure 3-1. On-Premises Metallic-Cable Configurations

Off-Premises Cabling

When DS1s reside in different locations, they are typically connected via a transmission facility (such

as a metallic cable configuration) that is leased from the local exchange company (LEC). This

facility usually consists of a line and T1 repeater combination. The customer premises equipment

interfaces to a DS1 network facility (T1 line) via NCTEs.

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