Nortel Networks Circuit Card User Manual

 NT6D80 MSDL card

The MSDL card includes four high-density 26-pin (SCSI II) female 
connectors for ports and one 8-pin miniature DIN connector for the monitor 
port. See Figure 86 on 

 for a diagram of the MSDL cabling 

configuration.

A D-Channel on the MSDL requires a connection from the appropriate 
MSDL port connector to the DCH connector located on the ISDN PRI trunk 
faceplate.

Other operations on the MSDL are connected to external devices such as 
terminals and modems. To complete one of these connections, connect the 
appropriate I/O connector on the MSDL to a connector on the I/O panel at the 
back of the module where the MSDL is installed. If a terminal is connected 
to the regular SDI port, use 8 bit, VT100 terminal emulation. If the terminal 
is connected to the SDI/STA port with line mode editing, use 8 bit, VT220 
terminal emulation.

To determine the type and number of cables required to connect to MSDL 
cards, you must determine the type of operation you wish to run and select the 
appropriate cable to connect the operation to the MSDL port. Different types 
of cables, as described in Table 155 on 

, connect the MSDL port to 

a device:

•

NTND26, used to connect the MSDL port to the ISDN PRI trunk 
connector J5, for DCH

•

QCAD328, when cabling between two different columns, that is, I/O to 
I/O (when MSDL is in one row and QPC720 is in another row)

•

NTND98AA (J5 of QPC720 to I/O panel)

•

NTND27, used to connect the MSDL port to the I/O panel at the rear of 
the module, for other interface functions