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2 INSTALLATION
2.1 UNPACKING AND INSPECTION
Immediately upon receipt of the equipment, carefully in-
spect the shipping container and the contents for any dis-
crepancies or damage. Should there be any, notify the
freight company and the dealer at once. The following
items are included:
Qty
Description
1
SSA-424 Dual Digital Hybrid
1
Power Pack with cord, 100-250 VAC, 50/60 Hz
1
Warranty and registration card
1
User Instruction Manual
Fill out and return the registration card.
2.2 MOUNTING
Place the SSA-424 on a desktop, or install it in an equip-
ment rack using an RTS MCP Rack Mount Kit. Several
rack mount options are available (Figure 2, page 8). There
are no special ventilation requirements for the SSA-424,
but allow ventilation around the power pack.
If the SSA-424 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 dis-
play helps to indicate which line is calling. If the
SSA-424 is 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
also available as described in paragraph 2.5).
You may wish to read about the internal mode DIP
switches before mounting the SSA-424. For further
information, see Mode Switch Settings, page 16.
2.3 4-WIRE AUDIO CONNECTIONS
2.3.1 ADAM, ADAM CS or Zeus Audio Connection
1.
Use standard 9-pin or RJ11 keypanel cables. Connect
from one port of your intercom system to J2A or J3A
(System A connection) on the back of the SSA-424.
Connect from another port to J2B or J3B (System B
connection).
2. On the SSA-424 front panel, set the 4W LEVEL REF
SEL switches to the +8dB position.
2.3.2 Audio Connections for Other 4-Wire
Communication Systems
1.
Construct 9-pin or RJ11 cables to connect from your
4-wire system to the SSA-424. To connect to the Sys-
tem 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 (on SSA-424 end of cable): 9-pin
male D-subminiature
Pin 1: No connection
Pin 2: No connection
Pin 3: No connection
Pin 4: Balanced Audio + output (to 4-wire system)
Pin 5: Balanced Audio - output (to 4-wire system)
Pin 6: No connection
Pin 7: Balanced Audio - input (from 4-wire system)
Pin 8: Balanced Audio + input (from 4-wire system)
Pin 9: No connection
RJ11 Connection
Connector Type (on SSA-424 end of cable): RJ11
plug
Pin 1: No connection
Pin 2: Balanced Audio + input (from 4-wire system)
Pin 3: Balanced Audio + output (to 4-wire system)
Pin 4: Balanced Audio - output (to 4-wire system)
Pin 5: Balanced Audio - input (from 4-wire system)
Pin 6: No connection
2.
On the SSA-424 front panel, set the 4W LEVEL REF
SEL switches to the position which most closely
matches the audio input and output levels of you
4-wire system. If you don't know the levels, select
+4dB for now.
User Instructions, SSA-424 Dual Digital Hybrid 7
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