ADTRAN 4106 Plan A, 4206 Plan A T1 Connections RJ-48C, Tracer 4106/4206 DCE to Modem DCE DB-25

Section 3 Engineering Guidelines TRACER 4106/4206 System Manual

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Hangup-on-DTR-drop may need to be explicitly enabled on some modems.

Table 5 contains the wiring diagram needed for connecting the TRACER 4106/4206 RS-232 interface to a modem using the null modem adapter.

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 4106/4206 (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

T1 Connections (RJ-48C)

The physical T1 interfaces are provided by eight RJ-48C jacks that comply with the applicable ANSI and AT&T® standards.

		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

30 © 2004 ADTRAN, Inc. 612804206L2-1A