Setting Up Supplemental Phone Service; The Flash Key; Call Waiting; How To Use Call Waiting - ZyXEL Communications P-202H V2 User Manual

P-202H Plus v2 User's Guide

13.2 Setting Up Supplemental Phone Service

All Supplemental Phone Services are enabled by default except for Call Waiting, which is
disabled by default but can be enabled in SMT Menu 2.1 - ISDN Advanced Setup. The
Calling Line Indication, or Caller ID, also in this menu decides whether the other party can
see your number when you call. If set to Enable (default), the ZyXEL Device sends the caller
ID and the party you call can see your number, otherwise if set to Disable, the caller ID is
blocked.

13.3 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 ZyXEL Device.

13.4 Call Waiting

ISDN Call Waiting allows you to place a call on hold while you answer another incoming call
on the same telephone (directory) number.
By default call waiting is enabled on both telephone ports (except France where the default is
disabled), but can be toggled on either port from Menu 2.1.

13.4.1 How to Use Call Waiting

The Call Waiting feature on your ISDN line works in exactly the same way as it does on a
regular analog line (which almost everyone is familiar with).

13.4.1.1 Placing the Current Call on Hold

To place the current call on hold and answer the incoming call, press the flash key after
hearing a call waiting indicator tone.

13.4.1.2 Dropping the Current Call to Switch to an Incoming/Holding Call

After hearing a Call Waiting indicator tone, simply hang up the telephone and wait for it to
ring before answering the incoming/holding call.
An incoming caller receives a busy signal if
• You have two calls active (one active and one on hold, or both active using Three-Way
Calling) already.
145 Chapter 13 Supplementary Phone Services