RAD Data comm ASM-20 - Manual (Page 43)

ASM-MN-214 Card Cage 5-1
Chapter 5
Card-Cage Version
This chapter describes the ASM-20/R card version, designed for installation in the
ASM-MN-214 card cage. The chapter describes:
• ASM-MN-214 card cage
• ASM-20/R card version
• ASM-20/R power supply
• How to install ASM-20/R.
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 ASM-20/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 (see
Figure 5-1 ) is to be attached to the rear panel terminal
block connectors. It contains screws for connecting the transmit and receive pairs
and ground, if present.
The 25-pin D-type female interface connector provides all interface signals for the
digital interfaces. Modems with X.21 or V.35 interface require an external
mechanical adapter. Two optional interface attachments, CIA/V.35/1 and
CIA/X.21, can be ordered separately from RAD. CIA/X.21 converts two adjacent
DB-25 connectors to two X.21 15-pin connectors. CIA/V.35/1 converts one DB-25
connector to a V.35 34-pin connector. V.36 modem cards are supplied with a
RAD adapter cable CBL 530/449F, which converts the DB-25 connector to a V.36
37-pin connector. The adapter cable and two interface attachments are also
shown in
Figure 5-1 .