3.1 GUIDELINES FOR INTEGRATION
44 INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS
Message Waiting Notification from an SLT
The PBX extensions should light a lamp or receive stutter dial tone when the Mess age-Waiting-
Lamp-On code is dialed by the VPS. The VPS functions best when the extension number of
the voice mailbox owner follows the Light-On or Light-Off code. On some PBXs, howe ver , the
extension number is dialed first, followed by a hookswitch flash and then the On code. This
presents a problem if the extension is answered before the VPS sends the hook-switch flash.
If the PBX does not provide message waiting notification from an SLT, the VPS can only
notify mailbox owners by dialing a beeper number or user-assigned extension.
This process slows down VPS performance as it dials t he beeper or e xtension number a nd waits
to confirm notification. The beeper or user-assigned extensi on notif icat ion is meant t o be used
for necessity, usually for mailbox owners who are often out of the office (e.g., salespeople or
field representatives). The only other option, without message waiting notification, is for
mailbox owners to periodically call the VPS to check for messages.
Screened Transfer from an SLT
The PBX must provide a screened transfer from an SLT for the VPS to function properly.
A screened transfer:
1. Puts the caller on hold, usually with a hookswitch flash.
2. Dials the extension.
3. Checks to see if the called subscriber is in, out, or on another line , and whet her or not t hat
subscriber accepts the transfer.
4. Completes the transfer (by going on-hook) or returns to the caller to say that the party is
busy or not available. It then gives the caller an opportunity to leave a message.
If the PBX does not provide screened transfer from an SLT, the VPS cannot give callers the
option to leave a message in a subscriber's mailbox.
Follow-on ID or Called Party ID
When forwarding or transferring a call to the VPS, a PBX with Follow-on ID sends the mailbox
number of the called subscriber to the VPS before connecting the cal ler. The VPS responds by
playing that subscriber's personal greeting. This operation is sometimes called Call Forw ard to
TEST: See if dialing the On code from an SLT can turn on an extension's
message waiting indicator.
TEST: Place an outside call from an SLT. See if you can set up a screened
transfer to another extension. Next, try the same test with an internal call.
(The VPS may have to transfer both types of calls.)