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 |
