Operation Manual – Call Services
H3C XE 200/2000 IP PBX
Chapter 15 Callback-On-Busy Service
15-1
Chapter 15 Callback-On-Busy Service
15.1 Overview
15.1.1 Introduction to Callback-On-Busy Service
When a subscriber using the callback-on-busy service fails to make a call because the
callee is busy, the XE IP PBX records the call request and then initiates the call again
after a certain interval.
A subscriber using the callback-on-busy service cannot make or answer a call before
the first ringing. Otherwise, the callback-on-busy service will become ineffective
automatically.
When the callback-on-busy service is enabled, the XE IP PBX will get through the
called number independent of the restriction from services like do-not-disturb or call
forwarding.
Note:
To use the callback-on-busy service, you need to enable the MS on the XE IP PBX first.
15.1.2 Terminologies
I. Call back interval
Counted in minutes, call back interval refers to the interval between the successful
registration of the call back service and the first call-back made by the XE IP PBX.
If the
retry times is set to a value larger than 1, the XE IP PBX will retry calling back after this
interval if a call back attempt fails.
II. Call back retry times
Call back retry times
refers to the number of times that the XE IP PBX can retry calling
back in case of call-back failure.
With the call back service enabled, the XE IP PBX first invites the callee to join the call
after the preset call back interval. After the callee picks up the phone, the XE IP PBX
invites the caller, and the conversation begins after the caller picks up the phone.
If any
failure occurs in inviting the callee, and if the call back retry times is set to a value larger
than 1, the XE IP PBX will initiate another call invitation after the preset call back
interval, till the callee picks up the phone or the retry times has been reached. If the
Содержание XE 200/2000 IP
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