Aastra OpenCom 510 - Internal S; Ports; U Pn Ports; Terminals Connected to U Pn Ports

Interfaces and Connectible Terminals U
pn
Ports
44
Wiring for direct connection
5.2.3 Internal S
0
Ports
Up to eight ISDN terminals per bus can be connected to the internal S
0
ports by
means of four-wire cables. Three of these terminals can be supplied with power
from the bus; any additional terminals will require their own power supply. The
internal S
0
buses can be used for point-to-multipoint connections in accordance
with the DSS1 protocol (Euro ISDN).
ISDN terminals can be connected to internal S
0
ports by means of a crossed ISDN
cable. For the pin assignment of crossed ISDN cables, refer to the illustration Wiring
for direct connection on page 44. If the terminal did not come with a suitable ISDN
cable, contact your dealer or DeTeWe distributor.
The length of an internal S
0
bus cable must not exceed 150 m. Each internal S
0
bus
has a power feed of approx. 3 W. The feed voltage is
–42 V.
5.3 U
pn
Ports
5.3.1 Terminals Connected to U
pn
Ports
U
pn
ports can be used to connect one of the following system terminal types:
■ RFP 22 DECT base station
■ OpenPhone 61, OpenPhone 63 or OpenPhone 65 system telephone
■ OpenPhone 52 ISDN system terminal
12345678
87654321
PBX 1, S
0
ext
PBX 2, S
0
ext
(RJ-45 socket)