The Flash Key; Supplementary Phone Services - ZyXEL Communications PMG5318-B20A User Manual

Chapter 10 Phone Usage
Note: To take full advantage of the supplementary phone services available through the
GPON Device's phone port, you may need to subscribe to the services from your
VoIP service provider.

10.4.1 The Flash Key

Flashing means to press the hook for a short period of time (a few hundred milliseconds) before
releasing it. On newer telephones, there should be a "flash" key (button) that generates the signal
electronically. If the flash key is not available, you can tap (press and immediately release) the
hook by hand to achieve the same effect. However, using the flash key is preferred since the timing
is much more precise. With manual tapping, if the duration is too long, it may be interpreted as
hanging up by the GPON Device.
You can invoke all the supplementary services by using the flash key.

10.4.2 Supplementary Phone Services

This section describes how to use supplementary phone services. Commands for supplementary
services are listed in the table below.
After pressing the flash key, if you do not issue the sub-command before the default sub-command
timeout (2 seconds) expires or issue an invalid sub-command, the current operation will be
aborted.
Table 34 Flash Key Commands
COMMAND
Flash
Flash
Flash
Flash
Flash
10.4.2.1 Call Hold
Call hold allows you to put a call (A) on hold by pressing the flash key.
If you have another call, press the flash key and then "1" or "2" (depending on whether it is the first
or second incoming call) to switch back and forth between caller A and B by putting either one on
hold.
Press the flash key and then "0" to disconnect the call presently on hold and keep the current call
on line.
94
SUB-COMMAND DESCRIPTION
Put a current call on hold to place a second call.
Switch back to the call (if there is no second call).
0 Drop the call presently on hold or reject an incoming call which is
waiting for answer.
1 Disconnect the current phone connection and answer the first incoming
call.
2 1. Switch back and forth between two calls.
2. Put a current call on hold to answer an on-hold call or the second
incoming call.
3. Separate the current three-way conference call into two individual
calls (one is on-line, the other is on hold).
3 Merge the first call which was placed on hold into the second call and
start a 3-way conference call.
PMG5318-B20A User's Guide