Answer Call Forward:
a) If subscriber A can enable all the forward services, all the calls will be
forwarded to the unconditional call forward number, and other forward services
do not come into effect
b) If subscriber A enable the forward services other than unconditional call forward
service, when A is busy, even if caller number meet with the selective call
forward conditions, the call will still be forwarded to the busy call forward
number A.
c) If subscriber A enable the forward services other than unconditional call forward
service, when A is available, if the caller number meets with the selective call
forward conditions, the call will be transferred to the corresponding selective
call forward number;
d) If subscriber A enable the forward services other than unconditional call forward
service, when A is available, if the caller number does not meet with the
selective forward condition, if the callee does not pick up the phone when the
time exceeds the “No Answer Call FWD Timeout”, the call will be transferred to
the “No Answer Call FWD NBR”.
5) Call forward service only has configure requirements on the callee products: for the
forward numbers of all types and caller number of selective call forward service,
only need input the caller number; besides, the corresponding routing direction of
forward number need be configured. If it is peer to peer, the routes of peer to peer
also need be configured.
6
6
.
.
2
2
.
.
1
1
.
.
6
6
C
C
a
a
l
l
l
l
W
W
a
a
i
i
t
t
i
i
n
n
g
g
6
6
.
.
2
2
.
.
1
1
.
.
6
6
.
.
1
1
F
F
u
u
n
n
c
c
t
t
i
i
o
o
n
n
I
I
n
n
t
t
r
r
o
o
d
d
u
u
c
c
t
t
i
i
o
o
n
n
A complete Call Transfer flow is as follows: (suppose there are three subscribers: A, B,
C)
1) A calls B
，
the call has connected.
2) C calls B, C hear the normal ringback tone, B hear the call waiting indication tone,
3) B press hook key to switch to talk with C.
4) B press hook key again to switch to talk with A.
6
6
.
.
2
2
.
.
1
1
.
.
6
6
.
.
2
2
N
N
o
o
t
t
e
e
s
s
It only works in sip protocol and the call hold service must be enabled at the same time.
6
6
.
.
2
2
.
.
1
1
.
.
7
7
N
N
o
o
D
D
i
i
s
s
t
t
u
u
r
r
b
b
