Nortel Circuit Card Installation Manual page 511

Figure 99
RJ-11 or RJ-45 jacks
EIA signals from
the DAC (unit n)
TxD
RxD
GND
DTR
MDF
Figure 99 shows a connection through an RJ-11 or RJ-45 jack located at the
data station. It is recommended that four wires be used similarly to the AIM
drop when using the RJ-11 jack. Another cable is required to convert the
RJ-11 or RJ-45 into DB25.
Note: It is necessary to turn over Receive Data and Send Data between
the DAC and the AILU. This is done on the TN at the MDF.
RJ-11
jack
Figure 100 on page 512
to connect the data equipment to the patch panel. This particular panel shows
two 50-pin connectors into twelve DB25. The signals from the MDF travel
on 25-pair cables, terminating at the patch panel.
Note: Use patch panels that follow the pinout of the DAC.
Figure 101 on page 513
replaces the combined patch panel and RS-232-C cabling scheme. The
25-pair cable is split into six RS-232-C male or female connectors. This
allows direct connections to the data equipment from the I/O panel. The
octopus cable allows for the maximum segregation of the voice signals that
might otherwise be present within the same 25-pair cable.
NT7D16 Data Access card
1 (TxD)
6 (RxD)
RJ-11
5 (GND)
plug
20 (DTR)
illustrates the patch panel. RS-232-C cables are used
describes an octopus cabling scheme. This cable
Circuit Card
Page 511 of 906
1 (TxD)
6 (RxD)
5 (GND)
20 (DTR)
6 (DSR)
8 (DCD)
4 (RTS)
5 (CTS)
553-5023
Description and Installation