Grandstream Networks DP720 Administration Manual page 64

Incoming Call

Parallel: In this mode, all phones ring concurrently. If one phone answers, the remaining available
phones can make new outgoing calls.

Shared: In this mode, all phones ring concurrently. The handsets always share the same line, so if
one answers the call; none of the other handsets will be able to make outgoing call since the line is
busy at that time.
No Answer No Answer
HS 2
HS 1
Available Available
Incoming Call
HS 1
HS 2
Call
Line
answered
Available
Incoming Call
HS 1
HS 2
Call
Line
Shared
answered
Shared
DP750/DP720 Administration Guide
No Answer
HS 4
HS3
Available
Available
HS 4
HS 3 HS 5
Line
Line
Line
Available
Available
Available
HS 4
HS 3 HS 5
Line
Line
Line
Shared
Shared
No Answer
HS5
Available
P a g e | 64