Alcatel-Lucent MDR-8000 - Page 107

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Figure 3 - 38 Other Front PPP Port Connections (Sheet 1 of 2)
TMN INTERFACE
CROSSOVER MODE
RJ-45
MDR-8000
TMN INTERFACE
NORMAL MODE
RJ-45
MDR-8000
MDR-1280
12/15/06
Data +
Data -
Clock +
Clock -
Data +
Data -
Clock +
Clock -
9400 AWY
CO-DIRECTIONAL
MODE
DB-15
OR
USER EQUIPMENT
GENERIC OR 9400 AWY TO TMN
GENERIC
3
11
4
12
1
9
2
10
TXD+
TXD-
TXC+
TXC-
RXD+
RXD-
RXC+
RXC-
3 RXD+
6 RXD-
7 RXC+
8 RXC-
1 TXD+
2 TXD-
4 TXC+
5 TXC-
In Crossover mode, the Received Clock is used to time the Transmitted
data, and the interface is synchronous with the external equipment.
Data +
Data -
Clock +
Clock -
Data +
Data -
Clock +
Clock -
9400 AWY
CO-DIRECTIONAL
MODE
DB-15
OR
USER EQUIPMENT
GENERIC
3
11
4
12
1
9
2
10
TXD+
TXD-
TXC+
TXC-
RXD+
RXD-
RXC+
RXC-
1 RXD+
2 RXD-
4 RXC+
5 RXC-
3 TXD+
6 TXD-
7 TXC+
8 TXC-
In Normal mode, the functions of the pins reverse, the clock from the user equipment is used
to time the incoming data, and an internal clock is used to time the outgoing data making the
interface fully asynchronous.