Nortel 600 Series Manual page 39

Figure 2-23: NT3T09 Serial Data Interface pack - switch locations
August 2006
(C)
An option plug is inserted in one of the plug positions (A), (B), or
Note:
(C), depending upon the type of device connected to the 3T09 pack, as
follows:
A. For a modem.
B. For an RS-232C port (maintenance terminal).
C. For a 20-mA current loop.
For Generic 602.20
Switch settings for printed circuit packs
(A)
(B)
Speed Switches
Address Switches
1 6
08.01
2-32
NTP 297-3601-316