Call Transfer; Call Backup; Hunt Group; Call Barring - 3Com MSR 50 Series Configuration Manual

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Call Transfer

Call Backup

Hunt Group

Call Barring

Support for FEATURE
Service of 3Com Voice
System
S C
ERVICES ONFIGURATION
Currently, the system supports four different types of call forwarding.
Call forwarding unconditional: With this feature enabled on a voice subscriber
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line, incoming calls will be forwarded to the predetermined destination, no
matter whether the voice subscriber line is available.
Call forwarding busy: With this feature enabled on a voice subscriber line, an
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incoming call will be forwarded to the predetermined destination when the
voice subscriber line is busy.
Call forwarding no reply: With this feature enabled on a voice subscriber line,
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an incoming call will be forwarded to the predetermined destination when the
voice subscriber line is not answered within a period of time.
Call forwarding unavailable: With this feature enabled on a voice subscriber
■
line, an incoming call will be forwarded to the predetermined destination when
the voice subscriber line is shut down.
User A (originator) and User B (recipient) are in a conversation. User A presses the
flash hook and the call is put on hold. User A dials another number to originate a
call to User C (final recipient) so that the call between User B and User C is
established.
After initiating a call to the terminating system, the originating system is unable to
receive a response. In this case, if there is another link (PSTN link or VoIP link) to
the terminating system, the originating system re-initiates a call to the terminating
system along the new route. This is call backup.
Currently, the system supports two types of call backup:
A PSTN link or VoIP link backs up a PSTN link
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A PSTN link backs up a VoIP link
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Multiple voice subscriber lines are configured for a called number. If the voice
subscriber line with the first priority is unavailable when the terminating system
receives a call setup request from the originating system, the call will still be
established between them. This is hunt group.
Call barring includes incoming call barring and outgoing call barring.
Incoming call barring usually refers to the Do Not Disturb (DND) service. When
incoming call barring is enabled on a voice subscribe line, calls originated to the
attached phone will fail.
When outgoing call barring is enabled on a voice subscriber line, calls originated
from the attached phone will fail, too.
Together with a 3Com server, 3Com voice systems implement the application of
multiple voice features such as Silent Monitor, Camp On, and FwdMail Toggle by
means of the 3Com proprietary SIP FEATURE message. All these voice features are
called FEATURE service.