Panasonic KXTVS100 - VOICE MAIL SYSTEM, Быстрое руководство по установке

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CHAPTER 4
I
NTEGRATING THE
VPS
WITH
P
ANASONIC
KXT P
HONE
S
YSTEMS
GUIDELINES FOR INTEGRATION
W
HY
I
NTEGRATION IS
I
MPORTANT
The KX-TVS100 works well with most PBXs because its connections are made through a standard single-line
(tip/ring) telephone interface. However, the VPS operation depends on the capabilities and features provided by
the PBX; its performance will vary when connected with different PBX systems. For example, Follow-on (or
Called Party) ID is a feature of the PBX. If the PBX does not have this feature, the VPS cannot transfer calls
directly to the correct mailbox and play the busy or no-answer greeting for that mailbox. Instead, callers are
told that the extension is busy or that no one is available and they may choose to leave a message or take another
action.
U
NDERSTANDING
H
OW THE
VPS
AND THE
PBX C
OMMUNICATE
To the PBX, the VPS looks like SLT sets. The PBX thinks that the VPS is an SLT, and the VPS mimics all
actions a live attendant would carry out from an ordinary 2500 type set.
For the VPS and the PBX to communicate, proper signaling is important. Like an attendant, the VPS places
calls by going off-hook and dialing numbers. It starts call transfers with a hookswitch flash to put callers on hold
and then dials the desired extension number. By recognizing call progress tones from the PBX, the VPS decides
how calls should be handled. Inband Integration allows the PBX to send certain digits (DTMF) to the VPS,
allowing it to quickly recognize the status of the extension and take the appropriate action.
VPS/PBX COMMUNICATION
PBX to VPS VPS to PBX
Call Progress Tones
• ring back
• busy
• reorder
DTMF Tones
SLT Signals
• on/off hook
• hookswitch flash
• DTMF tones
The VPS must also have access to certain PBX features. For example, if the VPS takes a message, one way it
can notify the mailbox owner is by dialing the PBX’s Message-Waiting-Lamp-On code. Once new messages
are retrieved, the VPS dials the Message-Waiting-Lamp-Off code for that same mailbox owner.