Section 3 Engineering Guidelines
TRACER 4102/4202 System Manual
30
© 2004 ADTRAN, Inc.
612804202L1-1A
TRACER 4102/4202, selecting
M
ODEM
C
ONNECTION
resets the TRACER 4102/4202 to the password entry
screen.
Table 5 contains the wiring diagram needed for connecting the TRACER 4102/4202 RS-232 interface to a
modem using the null modem adapter.
T1 Connections (RJ-48C)
The physical T1 interfaces are provided by two RJ-48C jacks that comply with the applicable ANSI and
AT&T
®
standards.
Hangup-on-DTR-drop may need to be explicitly enabled on some modems.
The null modem interface must route Carrier Detect (CD) on pin 8 directly from the
modem. When using the RS-232 interface for modem control, the modem must source CD
only when actually connected to a carrier.
Table 5. TRACER 4102/4202 (DCE) to Modem (DCE - DB-25)
PIN
NAME
PIN
NAME
2
TX
3
RX
3
RX
2
TX
4
RTS
5
CTS
5
CTS
4
RTS
6
DSR
20
DTR
7
GND
7
GND
8
CD
8
CD
Table 6. T1 Interface Connector Pinout
PIN
NAME
DESCRIPTION
1
R
Transmit data (ring) towards the network
2
T
Transmit data (tip) towards the network
3, 6-8
UNUSED
—
4
R1
Receive data (ring) toward the network
5
T1
Receive data (tip) from the network
