System Functions and Features as of I7.9
390
Features
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8. 6. 4
Call waiting
Call waiting is used to notify an internal, busy user B that another user C is waiting
to talk.
User B can choose to take C’s call (and put the original call on hold, end the original
call or set up a three-party conference) or reject it.
Fig. 189
Call waiting
Detailed Description
Tab. 211 Call waiting
If B is in an outside call , call waiting will only work if this feature is enabled for out-
side calls, too (applies to the entire system).
If Courtesy Service (announcement prior to answering) is activated and user B does
not respond to the external call waiting, the calling user C will obtain announce-
ment prior to answering.
Tip:
If call waiting is disabled, the Attendant for example has the possibility of
sending a text message to users who have a system terminal with display,
and to do so even during a call (e.g. "Urgent international call").
Interface
Operating sequence / signalling on the termi-
nal
Scope
B
B hears the dampened call waiting tone, which is
played into the current call. If B has a terminal
with display, the call number or name of caller C
is indicated, provided his CLIP / CNIP information
is available.
Requirement:
• B has allowed call waiting on his set.
• B is not in the process of setting up a
call, in an enquiry call or in a confer-
ence.
C
• C obtains the ring-back tone by way of confir-
mation.
• C obtains the busy tone if call waiting is not
allowed or not available and if B rejects the call
waiting.
Possible interfaces:
• Internal
1)
Requirement:
• C is authorized to use call waiting.
1)
If C is an external user, call waiting is effected automatically (i.e. C cannot activate call waiting), providing the
user receiving the call waiting has enabled the feature.
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