HP 4937A Operating And Service Manual page 49

. 4937A
lishing Talk Condition
ze the line as described in the previous section, Using Wink Signaling,
nnect lineman's handset (butt-in) to DIAL jacks located on the front panel.
■ ss DIAL key. OFF HK ORIG LEO should be lighted and a tone should be heard on the handset.
e line is
novj
ready to accept dial pulses, tones, or voice.
perform transmission impairment measurements, release DIAL key (an internal hold coil will
itinue to hold the line),
rform desired measurement as described in the Measurements Section.
asing The Line
ess ON/OFF HOOK key and verify the following LEDS.
1
ON HK ORIG - lighted
, OFF HK ORIG - oft
'essing the ON/OFF HOOK key again will re-seize the line