Talkswitch 24-CA User Manual page 157

Call Hold and Flash
TalkSwitch uses Flash to put calls on hold. A Flash signal is produced by
pressing the Flash or Link button on your telephone (Link is another name
for Flash). If you do not have these buttons on your telephone, you can
produce a Flash signal by quickly depressing and releasing the telephone's
hang-up hook or hook switch.
Single Flash — is pressing the Flash or Link button once. You can also
depress and release the telephone's hang-up hook or hook switch once.
Double Flash —is pressing the Flash or Link button twice. You can also
depress and release the telephone's hang-up hook or hook switch twice.
When using your telephone's hang-up hook to initiate a 'Double Flash', do
not try to initiate the second Flash too quickly or you may disconnect your
caller.
Press and release the hang-up hook once, count to 2, then initiate the
second Flash.
When would you use double flash?
1. If TalkSwitch is connected to any other system/service that uses Flash to
activate its features (e.g. a Key Telephone System, PBX, or telephone line
with the Centrex service from your phone company).
2. If you are using any of your local telephone company services that are
activated with Flash (e.g. Call Waiting, 3-Way Calling/Conference, etc.).
What does Single and Double Flash do?
TalkSwitch and the above-mentioned systems/services use Flash to activate
their calling features. TalkSwitch therefore needs a way to tell which (or
whose) features you want to access when you press the
Flash button.
Using a 'Single Flash': places the caller on hold. (The Flash is not passed to
the CO line, solving problems associated with Flash causing a hang-up at
some CO).
Using a 'Double Flash': the first Flash places the caller on hold, and the
second Flash (if pressed within 2 seconds) tells TalkSwitch to pass a Flash to
the CO line to activate the intended CO or PBX feature.
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