Westermo TD-36 User Manual
Page 18
18
6618-2202
Leased Line
* Direction relative to this unit.
Position
D-sub
Screw
terminal
Direction*
Description
D-sub
description
No. 1
No. 4
Outd
Data Carrier Direct (DCD)
No. 2
No. 7
Out
Received Data (RD)
No. 3
No. 8
In
Transmitted Data (TD)
No. 4
No. 3
In
Data Terminal Ready (DTR)
No. 5
No. 1
Not Connected
Signal Ground (SG)
No. 6
No. 2
Out
Data Set Ready (DSR)
No. 7
No. 6
In
Request To Send (RTS)
No. 8
No. 5
Out
Clear To Send (CTS)
No. 9
No. 9
Out
Ring Indicator (RI)
RS-232 (DCE)
1
2
3
4
5
6
7
8
9
Position
Product marking
RJ-11C
Screw
terminal**
Direction* Description
RJ-11C
Screw terminal
a
–
Not Connected
b
In/Out
PSTN Transmit/ Receive
Disconnects from “pin c”
when the modem goes
Off-Hook
c
No. 2
In/Out
PSTN Transmit/ Receive
d
No. 1
In/Out
PSTN Transmit/ Receive
e
In/Out
PSTN Transmit/ Receive
Disconnects from “pin c”
when the modem goes
Off-Hook
f
–
Not Connected
* Direction relative to this unit. ** The PSTN screw terminals are shared with 2-wire Leased Line.
PSTN
LL2
LL1
Position
Direction*
Description
Product marking
No. 1
Out
4-wire Transmit
LL1
In/Out
2-wire Receive/ Transmit
No. 2
Out
4-wireTransmit
LL2
In/Out
2-wire Receive/ Transmit
No. 3
In
4-wire Receive
LL3
In/Out
2-wire Receive/ Transmit at
Leased Line PSTN backup
No. 4
In
4-wire Receive
LL4
In/Out
2-wire Receive/ Transmit at
Leased Line PSTN backup