LBI-39055
24
❏ Send operator headset mic audio to the LINE B
output by typing the following command:
<F2> 2001 <Enter>
❏ Speak into the headset's mic and verify the audio
signal is now present on the LINE B balanced
output. Maximum signal level is approximately 6
Vp-p.
❏ Turn the operator headset mic-to-LINE B audio off
by typing the following commands. The audio
should turn off after the first command is entered:
<F2> 6330 <Enter>
<F2> 2000 <Enter>
❏ Verify mic audio is no longer on the LINE B
balanced output.
Successful completion of this tests verifies basic
operation of the following:
• operator headset mic input circuitry
• Line A and B output circuitry
• PC and Logic Board's ability to control the cross-
point audio matrix switches on the Audio Matrix
Board
4. Test Audio PA Board #2 (if installed)
If a second Audio PA Board is installed in the Audio
Tower, the following procedure can be used to test it:
❏ Power-down the Audio Tower and swap the #1
board with the #2 board.
❏ Power-up the Audio Tower.
❏ Repeat steps 1, 2 and 3.
❏ Power-down the Audio Tower and swap the #1
board with the #2 board.
❏ Power-up the Audio Tower.
5. Completion
❏ Remove all test connections and reconnect the
RJ-11 modular plugs from the CEC/IMC to the
LINE A and LINE B modular jacks on the Audio
PA Board (#1).
HIGH-LEVEL TESTS
The following high-level tests verify basic operational
status of control data and audio interfaces between the C3
Maestro console and the CEC/IMC. The procedures assume
all equipment has been interconnected and set-up in
accordance with the previous instructions presented in this
manual.
Control Data Link
The C3 Maestro console and the CIM within the
CEC/IMC periodically poll each other over the control data
link. If this link is not operating correctly the console will
display a "Com Error: link down @xxxxx bps" error
message on the PC's video display monitor. This link must
be up (operating) before any dispatch operation can occur.
For troubleshooting information, refer to the CEC/IMC
Digital Audio Switch Installation, Set-Up and
Troubleshooting maintenance manual, LBI-38938. The
console-to-CIM link up/down status can also be viewed via
the CEC/IMC Manager's (MOM PC's) "SYSTEM
DISPLAY" screen.
Upon restoration of a failed console-to-CIM control
data link a "Communications error condition cleared"
message is displayed.
Audio Links
After determining the control data link is operating by
the lack of an error message, audio link operation can be
tested. To test, program a module with a test group and
then place a call to and from a test radio set the same
group. Also test the operation of all unselect speakers.
Verify the console can send and receive audio. If necessary,
refer to the C3 Maestro console operator's manual. Refer to
LBI-38938 for troubleshooting information.
If the console is is equipped with a Call Director, test
Call Director patch operation by patching a radio to a
telephone line. See the operator's manual for details.
Ericsson GE Mobile Communications Inc.
Mountain View Road • Lynchburg, Virginia 24502 Printed in U.S.A.