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SSA-424 USER MANUAL 15
3 Operation
3.1 GENERAL INSTRUCTIONS
1 Attach the power pack to the SSA-424, and apply
power to all components. Confirm that the power
indicator is lit on the SSA-424 front panel.
2 The power indicator flashes when a call signal is
received fron a 2-wire line. The SSA-424 level
displays should help to confirm which line is
calling.
3 Use the level adjust trimmers (Figure 8) to fine
adjust the listen levels.
✏ For 4-wire systems other than ADAM, ADAM
CS, and Zeus, you may have to change the
setting of the 4W LEVEL REF SEL control to
establish the correct level. For 2-wire
systems other than Audiocom, TW, and
Clear-Com, you may have to adjust the level
at the 2-wire system if you cannot establish
the correct level with the 2-wire listen level
trimmers.
-15 -12 -9
-6 0
+3 +6 +9
+12
LEVEL
SET
SYSTEM B
-15 -12 -9
-6 -3
0
+3 +6 +9
+12
4W
2W
TO
TO
SSA-424
4W LEVEL
REF SEL
12
BAL
2W CHAN SEL
LEVEL
SET
SYSTEM A
-3
4W
2W
TO
TO
POWER
4W LEVEL
REF SEL
12
BAL
2W CHAN SEL
1
2
BAL
OFF
OFF
TM
0dB
+4dB
+8dB
+12dB
-10dB
0dB
+4dB
+8dB
+12dB
-10dB
1
2
BAL
OFF
OFF
4-WIRE LISTEN LEVEL ADJUSTMENT
2-WIRE LISTEN LEVEL ADJUSTMENT
Figure 8. Location of level adjust trimmers
3.2 OPERATING NOTES FOR ADAM, ADAM
CS, AND ZEUS INTERCOM SYSTEMS
1 In AZedit use port alpha setup to name each 4-
wire intercom port that is connected to the SSA-
424. Choose names which help indicate which
2-wire line is being interfaced.
2 Key assignment, party line assignment, etc. is
the same as for any other intercom port.
3 Optional call signal output using the GPI: ou can
assign the GPI output to a talk or listen key, then
activate that key to generate a call signal.
Another way to generate a call signal is by
assigning the GPI output as a level 2 talk key
assignment for any key that is assigned to talk to
the SSA-424. However, this will cause the call
lights to flash on the 2-wire line during the entire
conversation.
Another solution is to assign a dedicated key as
a UPL resource key (which you could name
CALL). Then for each key that talks to an SSA-
424 hybrid, create a UPL statement that will
activate (assert) the appropriate GPI whenever
the call key AND the talk key are pressed. This
lets you use the same call key with more than
one GPI. To use this, you simply activate the call
key and the appropriate talk key. Then, when a
verbal response is received, release the call key.
4 Optional call signal input using the GPI
A. In AZedit, click GPI In on the toolbar.
This opens the GPI Setup screen
.
B. Whichever GPI Input you are using for 4-wire
call receive, select that GPI input from the list
(double-click). This will open the Edit GPI
Input window.
C. In the Port Alpha list box, select the intercom
port that you named in step 1.
D. In the Key Number box, type 1. This selects
key 1 at the intercom port that you selected
in step C.
E. Select Talk Key.
F. Click Done.
G. Access keypanel setup, and select the same
intercom port that you selected in step C.
H. Make sure the setup page Main is selected.
I. Assign talk key number 1 to talk to the
intercom port that you setup in step 2. We
also recommend that you assign auto-listen
(AL) to the listen key above that talk key.
5 Optional call enable control. If you connected a
GPI output for use as a call enable control, you
can assign that GPi output to any intercom key in
the 4-wire intercom system. If System A is
connected to an Audiocom or TW intercom
system, pressing the key will disable call signal-
ing. (However, the effect is the opposite if a
Clear-Com system is connected: pressing the
key will disable the signaling.)
6 Send your changes to the intercom system. This
completes any required programming for ADAM,
ADAM CS, or Zeus intercom system.