Radiant Communications FOM-E1, Инструкция по установке и эксплуатации

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FOM-E1/T1 Ver. 2.0 ASM-MN-214 Card Cage 5-1
Chapter 5
FOM-E1/T1/R Card Version
This chapter describes the card cage version of FOM-E1/T1 and discusses the
following topics:
•
ASM-MN-214 card cage
•
FOM-E1/T1/R plug-in card for the ASM-MN-214 cage
•
Cage and card power supply
•
Installation of cage and card.
5.1 ASM-MN-214 Card Cage
The ASM-MN-214 card cage contains one or two power supplies and up to
14 plug-in cards. The card types can be FOM-E1/T1/R or other RAD rack version
modems or converters in any combination of up to 14 plug-in cards.
For each of the 14 cards, the rear panel (see
Figure 5-1
) contains a male
connector for the terminal block and a DB-25 connector. A protection cover
protects the terminal block connectors.
For the balanced E1/T1 interface, the terminal block contains screws for
connecting the transmit and receive pairs and ground. The transmit pair is
connected to the terminals marked XMT, the receive pair connects to the
terminals marked RCV, and the fifth screw is a terminal for optional ground
connection. When operating FOM-E1/T1/R with an unbalanced E1 interface, use
adapter CIA/TB-BNC/214 that converts the terminal block connector into two
coaxial BNC connectors.
The 25-pin D-type female connector serves as an alarm relay port (see
Appendix
A for the connector pinout).