1.11.9 Parallelled Telephone
Description
Multiple telephones can be connected to the same port. This is useful to increase the number of telephones
without
additional
extension cards. The combinations and features of the parallelled telephones are described
below.
Features
Descriptions Connections
Parallel Mode Parallel mode involves the connection of an SLT to
an APT or a DPT that is connected to a Super Hy-
brid port.
When parallel
mode is enabled, the two telephones
function as follows:
• Both share the extension number of the tele-
phone connected directly to the PBX (main tel-
ephone).
• Either telephone can make or answer a call.
APT/DPT + SLT
PBX
SLT
DPT
Extn. 101 Extn. 101
APT
Extn. 102
Extn. 102
SLT
EXtra Device Port
(XDP) Mode
XDP mode involves the connection of an SLT to a
DPT that is connected to a Super Hybrid port.
Unlike parallel mode, each telephone can act as a
completely different extension with its own exten-
sion number. (® 2.1.1 Extension Port Configura-
tion)
DPT + SLT
PBX
SLT
DPT
Extn. 101 Extn. 105
Digital XDP Digital XDP involves the connection of a DPT to a
DPT that
is connected to a DPT port or Super Hybrid
port. The DPT that is connected directly to the PBX
is called the "master DPT", and the DPT connected
to the master DPT is called the "slave DPT".
Like XDP mode, each telephone can act as a com-
pletely different extension with its own extension
number.
If a master DPT is connected to the PBX by a Super
Hybrid port (not a DPT port), a third telephone (SLT)
can also be in parallel or XDP mode with the master
DPT.
Digital XDP connection allows the number of DPTs
that the PBX supports to increase.
PBX
DPT + DPT
DPT
Extn. 101 Extn. 201
DPT
Master
Slave
PBX
DPT
Extn. 101
Extn. 201
SLT
Extn. 101 (in Parallel Mode)
or
Extn. 105 (in XDP Mode)
DPT
Master
Slave
DPT + DPT + SLT
164 Feature Guide
1.11.9 Parallelled Telephone
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