GAI-Tronics 12600-002 Line Current Boost Circuit Assemblies - Manual (Page 4)

Pub. 42004-433C
Model 12600-002 and 12600-40x Line Current Boost Circuit Assemblies Page: 4 of 5
f:\standard ioms - current release\42004 instr. manuals\42004-433c.doc
07/11
Wiring
CAUTION
The dc line current (LCBC disconnected) should be less than 40 mA dc.
Operation with line currents above 70 mA dc (includes LCBC 30 mA plus 40 mA line current) may
damage some telephone instruments. Line current can be measured by connecting a dc ammeter
between the tip and ring wires (red and green) from the telephone line. Polarity of the current is
unimportant.
Install a UL lightning arrestor on the L INE I N and L INE O UT phone cable if they are at risk of being
exposed to lightning strikes. The lightning arrestor must be installed as close to the phone as possible to
maximize the protection. It must not be installed within the enclosure supplied with the phone. Please
consult our Service Center at 800-492-1212 for further information.
Install the Line Current Boost Circuit Assembly as follows.
1. Connect incoming PBX line(s) to LINE IN connection(s).
2. Connect the telephone instrument(s) to LINE OUT connection(s).
3. Connect the power source.
4. Place the telephone instrument(s) on-hook.
5. If the green POLARITY light is on, the polarity for that line or channel is correct.
6. If the POLARITY light is off, press the associated POLARITY button. The POLARITY light should
turn on.
7. When the green POLARITY light and the blue READY light are on, the telephone instrument is
operational.
8. When the telephone instrument is taken off-hook the blue READY light goes off but the green
POLARITY indicator remains on.
Operation
After installation, no direct user interface is required for the operation of the Line Current Boost Circuit
Assembly.
Maintenance
Troubleshooting
Problem Solution
No LED illuminated. Check power supply.
Green LED will not illuminate. Check phone line for tip-ring voltage.