Originally Posted by
teckat
to check that the fax line is working / functional.
-- to check for noise (humming, popping, clicking, static, etc.). Always have the customer listen to the noise. It is their responsibility to provide a noise-free, error-free channel.
-- to check for long distance and international dialing access (newly installed lines may not be programmed correctly).
-- to check for pin code access (not every operator is familiar with the required dialing sequences).
2] telephone line voltages: fax machines communicate over single line phone networks where the 'ring' and 'tip' voltages are always located across the two center terminals. Line voltages are checked accordingly:
on-hook voltage (phone is hung up)
--set the volt meter to 200 vdc
--should read within the 48vdc ~ 52vdc range
off-hook voltage (phone is off-hook and dial tone is generated)
--set the volt meter to 200 vdc
--should read within the 8 vdc ~ 12 vdc range
ringing voltage (incoming call)
--set the volt meter to 200 vac
--should read within the 75 vac ~ 105 vac range
3] rj11-c modular jack: testing phone line voltages can be difficult if not impossible at times unless you can establish a really good connection to the phone line. The rj11-c box can be used to establish a good connection.
--rj11-c box with two female connectors (remove the cover and test with your meter across the red and green terminals). An additional phone cable is required.
--rj11-c box with one male and one female connector; remove the cover and test with your meter across the red and green terminals).
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