Chapter 5
Card Cage Version
5.1 General
This chapter describes the ASM-20/R card version, designed for installation in the ASM-MN-214 card cage. The chapter contains the following sections:
Section 5.2 describes the ASM-MN-214 card cage
Section 5.3 describes the ASM-20/R card version
Section 5.4 describes the power supply to ASM-20/R
Section 5.5 describes how to install ASM-20/R.
5.2 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.
