AT&T Telephone DS1/DMi/ISDN-PRI Instrukcja Użytkownika Strona 77

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DS1 TRANSMISSION AND CABLING
3-5
DS1
DS1
655 FT
MAXIMUM
655 FT
MAXIMUM
DSX-1 PHANTOM POINT
A. DIRECT DISTANCE OF 1310 FT OR LESS
NCTE
NCTE
DSX-1
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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