Aastra OpenCom X320 - Pn Ports

Installation Port Assignment, Termination, Cable Lengths
50
Switchable S
0
port on a pressure terminal
You can add further S
0
ports to the OpenCom 130 / 150 by installing suitable
interface cards in a slot. These S
0
ports can be switched between internal and
external operation.
Annotation concerning an OpenCom 130:
In contrast to the basic module, the expansion module does not provide any addi-
tional RJ45 jacks for external S
0
ports. Therefore you can also use the pressure ter-
minals of the expansion module for an external S
0
port. The port assignment of
the pressure terminals is changed when the switch is made from internal to
external operation. This can be seen in the diagram.
Tip: Let us say you have activated an IAE on an internal S
0
port, for
example. If you switch this S
0
port to external operation, you
require a crossed ISDN line to connect the IAE to an NTBA. The
assignment of a crossed line is described in the chapter PBX
Networking under Direct Connection starting on page 156.
3.10.2 U
pn
Ports
Each of the U
pn
ports enable the connection of a RFP 22 / 24 DECT base station, an
Aastra 6771 / 6773 / 6775 (OpenPhone 71 / 73 / 75) or an OpenPhone 61 / 63 / 65
telephone using a twin-wire cable.
Note: DECT base stations cannot be operated on the U
pn
ports of the basic module of an OpenCom 130. This is only
possible for U
pn
ports on the interface cards of the expansion
module.
Note: Only the system telephones Aastra 6771 / 6773 / 6775
(OpenPhone 71 / 73 / 75) and OpenPhone 61 / 63 / 65 can be
operated on the U
pn
ports of an OpenCom 131. Operating a
DECT base station is not possible on these U
pn
ports.
S
0
int
2a
2b 1a 1b
12345678
S
0
ext
1a
1b 2a 2b
12345678