Chapter 9 Starting the system 123
Installation and Maintenance Guide
Table 29 shows the wire connections for a DB25 adapter cable.
Connect wiring to the modem card
(North American Systems only)
Table 29 DB25 adapter cable
DB26 on
WAN card Signal DB25 cable
DB26 on
WAN card Signal DB25 cable
1Chassis Ground 114 14
2 Transmit Data 2 15 Transmit Clock 15
3Receive Data 316 16
4 Request to Send 4 17 Receive Clock 17
5Clear to Send 518 18
6 Data Set Ready 6 19 19
7Signal Ground/
Common Return
7 20 Data Terminal Ready 20
8 Data Carrier Detect 8 21 21
9922 22
10 10 23 23
11 11 24 External Clock 24
12 12 25 25
13 13 26
Warning: Ensure the system is powered up before connecting this
cable.
To connect the modem card, insert a PSTN line into the Line jack on
the modem card.
For information about the location of the modem card, refer to Figure
48 on page 121.
Note: Not all systems are equipped with a modem card.
RJ45 jack
Modem card face