
ASM-40 Ver. 1.0 ASM-MN-214 Card Cage 5-1
Chapter 5
ASM-40/R Card
This chapter describes the ASM-40/R card version, designed for installation in the
ASM-MN-214 card cage. The chapter contains the following sections:
• The ASM-MN-214 card cage
• The ASM-40/R card version
• Power supply to ASM-40/R card
• Installing the ASM-40/R 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 ASM-40/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.
Line Connector
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. When operating ASM-40/R with unbalanced E1 interface,
use a CIA/TB-BNC/214 adapter, which converts the terminal block connector into
two coaxial BNC connectors (see
Figure 5-1
).
The ASM-MN-214 card cage is also available with BNC coaxial unbalanced line
connectors.
DB-25 DTE Connector
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/X21/1 and
CIA/V.35/1, can be ordered separately from RAD. CIA/X.21/1 converts one DB-25
connector to an X.21 15-pin connector. 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 between the DB-25 connector and a V.36 37-pin connector.
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