36
Nera F77
Continuing the Saturn tradition
Terminal Name Signal 38VDC
4
a1
TX+
-
5
b1
TX-
-
3
a2
RX+
+
6
b2
RX-
+
ISDN wall socket
Part of MCU connector panel
1 2 3 4 5 6 7 8
TX
TX
RX
RX
TX
TX
RX
RX
TEL
4
ISDN
ISDN
ISDN
ISDN
ISDN
ISDN ISDN
TEL 3
TEL 4
ISDN
TX
TX
RX
RX
TEL
4
TX
TX
RX
RX
To next ISDN wall socket via
junction box, if required.
When the distance between the
MCU and the last connection box
on an ISDN bus exceeds 10m, the
termination resistors in the last box
must be incorporated by setting
both slide switches to position ON.
The switches in all other boxes
should be OFF (default setting).
The two RJ45 jacks are connected
in parallel.
ISDN bus
from the MCU
2 1
ON
4 5 3 6
2 1
ON
RJ45 RJ45
(TX+ TX- RX+ RX-)
8 1
8 1
a2 RX+
a1 TX+
b1 TX-
b2 RX-
ISDN
equipment
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
ISDN
connector
ISDN
ISDN
1 2 3 4 5 6 7 8
RJ45
ISDN telephones/equipment cont'd
ISDN wall socket
Summary of Contents for F77
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