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. It 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/converters – 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.
The terminal block contains screws for connecting the transmit and receive pairs
and ground, for the balanced E1/T1 interface. The transmit pair is connected to
the terminals marked XMT, the receive pair – to the terminals marked RCV, while
the fifth screw is a terminal for optional ground connection. When operating
FOM-E1/T1/R with unbalanced E1 interface, use a CIA/TB-BNC/214 adapter,
which 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).