Siemens HiPath 3000 Service Manual page 286

boards.fm
Boards for HiPath 3000
Peripheral Boards
Connecting ISDN terminals to HiPath 3750, HiPath 3700 (for U.S. only)
S bus with MW jack
0
You must change the signal sequence to connect up ISDN telephones. Transmit wires must be
on the inside; receive wires on the outside (see Figure 3-92).
To do so, jumper the four wires on the provided line cord to the pins for the STMD8 ports on the
main distribution frame (MDF).
The ISDN terminals must have their own local power supply.
S bus wiring from STMD8 port on MDF or from optiset E ISDN adapter (for U.S. only)
0
optiset E ISDN
adapter
Contact is always estab-
lished using the center
pins
MW8 = Cross the wires as shown
(not required in S
0
adapter).
STMD8 port on
MDF (port 1 shown)
Figure 3-92 STMD8 - S
3-220
1
2
SR
3
SX
1 2 3
ABC DEF
4 5 6
ABC DEF
GHI JKL MNO
7 8 9 0 GHI MNO
PQRS TUV WXYZ
PQRS TUV
0
SX
4
↵← →
↑ ↵
SR
5
6
bus from ISDN
MW8 jack 1
(8-pin)
2
SX
SX 27
SR 1
SR 26
.
.
.
Bus Wiring from STMD8 Port or from ISDN Adapter (for U.S. only)
0
1
2
3
4
5
6
7
MW8 jack 1
8
(8-pin)
MW8 jacks 2
to 7 (8-pin)
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
1
2
3
4
5
6
7
MW8 jack 2
8
(8-pin)
100 Ω/0.25 W
Terminating
resistors in the last
jack
Last MW8 jack
(8-pin)
1
2
3
4
5
6
7
8
P31003-H3550-S403-4-7620, 02/05