RTS SSA-424A - Manual (Page 9)

5
CHAPTER 2
Installation
Mounting
Place the SSA-424A on a desktop, or install it in an
equipment rack using an RTS MCP Rack Mount Kit. Several
rack mount options are available. There are no special
ventilation requirements for the SSA-424A, but allow for
ventilation around the power pack.
• If the SSA-424A has the call signal option, the power
indicator flashes whenever a call signal is received from
either 2-wire line, and activity on the level display helps
to indicate which line is calling. If the SSA-424A is
physically positioned near the 4-wire operator, this can
be used as an incoming call indication for the 4-wire
system, if desired (although other methods are available
as described in “4-Wire Call Signal Connections” on
page 8).
NOTE: You may wish to read about the internal mode DIP
switches before mounting the SSA-424A. For further
information, see Table 1 on page 15.
4-Wire Audio Connections
ADAM, ADAM-CS, or Zeus Audio Connection
1. Use standard 9-pin or RJ-11 keypanel cables. Connect
from one port of your intercom system to J2A or J3A
(System A connection) on the back of the SSA-424A.
Connect from another port to J2B or J3B (System B
connection).
2. On the SSA-424A front panel, set the 4W LEVEL REF
SEL switches to the +8 dB position.
Audio Connections for the Other 4-wire
Communications Systems
1. Construct 9-pin or RJ-11 cables to connect from the
4-wire system to the SSA-424A. To connect to the
System A hybrid, use either J2A or J3A; for the System
B hybrid, use either J2B or J3B. Pin connections are as
follows:
9-Pin Connection
Connector Type: 9-pin male D-subminiature
Pin 1 No connection
Pin 2 No connection
Pin 3 No connection
Pin 4 Balanced Audio + 4-wire output
Pin 5 Balanced Audio - 4-wire output
Pin 6 No connection
Pin 7 Balanced Audio - 4-wire input
Pin 8 Balanced Audio + 4-wire input
Pin 9 No connection
RJ-11 Connection
Connector Type: RJ-11 plug
Pin 1 No connection
Pin 2 Balanced Audio + 4-wire input
Pin 3 Balanced Audio + 4-wire output
Pin 4 Balanced Audio - 4-wire output