
EIA232/V.24 Rear
FaceplateConnector Connector
Plate
Status
 Pwr
 Alrm
142 
 Test
 Dial
125 
 RI
 Busy
 Serv
 SQ
103 
 TXD
104 
 RXD
105 
 RTS
106 
 CTS
107 
 DSR
108 
 DTR
109 
 LSD
EIA232/V.24
Edge Card
Connector
EIA232/V.24  | 
  | 
RS366A/V.25 (3800)  | V.35 (3600/3500)  | 
Front Panel
Spkr
3811Plus
Unused
Figure 1. 3811Plus Modem
June 1998  | 5  |