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Marathon 3K Voice/Fax Facility Manual
Voice/Fax Channel Level Adjustment Procedure
1. Use the test setup shown in Figure B5. Initially, set both Voice
Network Analyzers to BRDG, TEST, and OFF. The extension
numbers in Figure B5 are fictitious, used here for reference only.
No.1
Lineman’s
Test Set
or
Telephone
Set
(or PSTN
Telephone
Number)
VNA-70A
PBX or CENTREX PSTN
SET
LINE
X123
Station
Side
BRDG
TEST
OFF
Trunk
Side
X456
Marathon 3K
FXO
Voice
Channel 1
VNA-70A
SET
No.2
Lineman’s
Test Set
or
Telephone
Set
LINE
Force
Connect
FXS
Voice
Channel 2
BRDG
TEST
OFF
Figure B-5. PBX Station/Centrex Line Application Test Setup
2. Force connect the FXO channel to the companion FXS channel.
3. Place a call from PBX extension 123 to extension 456. To do that,
lift the No. 1 telephone offhook, wait for the dial tone from the
PBX, then dial extension number 456. The No. 2 telephone set will
ring. (In CENTREX PSTN applications, dial the published PSTN
number).
4. Place the SETUP switch on the No.2 Voice Network Analyzer to
TERM. The telephone will stop ringing.
5. Place the SETUP switch on the No.1 Voice Network Analyzer to
TONE, and disconnect the No.1 telephone from the Voice Network
Analyzer.
B-11