AT&T Telephone DS1/DMi/ISDN-PRI Instrukcja Użytkownika Pobierz pdf (Strona 79)

100

101

DS1 TRANSMISSION AND CABLING

3-7

The transmission system connects to a DS1 via a DSX-1 cross-connect●

●

The transmission system meets any special requirements for the application (for example, the

transmission of bipolar violations if B8ZS line coding must be used)

Figure 3-3, Nonmetallic Cabling Configurations, shows nonmetallic cabling transmission systems.

MICROWAVE

INTERFACE

MICROWAVE

INTERFACE

DS1/DMI

LIGHT-GUIDE

'INTERFACE

LIGHT-GUIDE

INTERFACE

DSX-1

DS1

INFRARED

INTERFACE

INFRARED

INTERFACE

655 FT

MAXIMUM

655 FT

MAXIMUM

ANY DSX-1

INTERFACE

––––––––––––––

ANY DSX-1

INTERFACE

Figure 3-3. Nonmetallic Cabling Configurations

CEM AND CDM CABLING CONFIGURATIONS

Both the CEM and CDM provide a DSX-1 cross-connect to the DS1/DMI-BOS and therefore connect

directly to a DS1/DMI-BOS. Any of the previously described metallic or nonmetallic transmission

media may be used for completing the connection from a DS1/DMI-BOS to CEMs and CDMs.

Figure 3-4, CEM and CDM Cable Configurations, shows stand alone and combined CEM and CDM

configurations.

Refer to Service Manual — Installation and Maintenance — Channel Division Multiplexer (365-165-

101) and to BCM32000 — Description, Installation, and Maintenance — Digital Transmission Systems

(365-287-100) for appropriate distance limitations and switch settings.

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