Connecting To A Terminal Or Modem - ADC PG-PLUS PLL-720 Technical Practice

Connecting to a Terminal or Modem

C
ONNECTING TO A
Connections between the craft port and a VT-100 terminal are shown in
connectors. Although a cable can be used that connects only the transmit (TD), receive (RD), and ground (GND)
signals, the craft port does not automatically log off when the VT-100 terminal is unplugged. Using a cable that
also connects the Data Terminal Ready (DTR) signal ensures automatic log off when the VT-100 terminal is
unplugged.
When connecting the port to a modem, use a null modem cable. The wiring for this cable is shown in
Ensure that the modem's Carrier Detect (CD) and DTR functions are enabled. This allows the modem connection
to terminate correctly when the Alarm or PGTC Interface unit drops Data Set Ready (DSR), and the unit logs off
when the modem drops Carrier Detect.
The craft port supports a VT-100 terminal. The VT-100 terminal allows real time updating of information
displayed on the screen, rather than requiring the technician to press the
Configure the VT-100 terminal as shown in
10
T M
ERMINAL OR
Figure 3. Craft Port to Terminal Connections
Figure 4. Craft Port to Modem Connections
Table 3.
January 6, 2003
ODEM
Figure 3 for both DB-9 and DB-25
key to refresh the screen.
ENTER
SCP-PLL720-020-03H
Figure 4.
PLL-720, PLL-721 List 2's