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U
Ports
pn
U
ports enable you to connect the digital system telephones
pn
Forum Phone 515, 525, 535 or Forum Phone 520, 530 using a
twin-wire cable. You can also connect DECT base stations to a U
port.
If you want to use cordless DECT handsets (e. g.
Forum Free 565 /575 or Forum Free 566 /576 /586) you will need
the DECT base station Forum Base DECT. If the DECT base station
is connected to a U
using the handsets. If the base station is connected to two U
ports, eight calls can be made simultaneously. Please note how-
ever, that you can only make as many simultaneous external con-
nections as there are externally-connected B channels available.
The length of a twin-wire cable for a U
maximum of 1000 m. This cable may only be laid inside buildings.
The length of a twin-wire cable for a U
card may not exceed a maximum of 1000 m, where a 0.6 mm
cable (with twisted pairs) is used.
Each U
port has a power consumption of about 3 W.
pn
U
/RFP with 1 U
pn
pn
1 2 3 4 5 6 7 8
RFP with 2 U
pn
1 2 3 4 5 6 7 8
Pin assignment of U
To connect a digital system telephone or DECT base station, con-
nect the pressure terminals to a UAE socket.
Port Assignment, Termination, Cable Length
port, four calls can be made simultaneously
pn
ports
pn
port must not exceed a
pn
port on a U
pn
pn
53
pn
pn
interface
Installation
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