Paradyne 316x manual Carrier-Mounted Model 3161 DSU/CSU, Model 3161 Front Panel Functions

ACCULINK 316x DSU/CSU

Carrier-Mounted Model 3161 DSU/CSU

The 3161 DSU/CSU is a circuit card that is installed into the 3000 Series Carrier. A single carrier can house up to 16 DSU/CSUs; the DSU/CSUs are controlled by the carrier's Shared Diagnostic Control Panel (SDCP), which can control up to eight carriers. Rear panel connections are provided by the Auxiliary Backplane, which is installed on the rear of the carrier.

Model 3161 Front Panel Functions

The twelve LEDs and six test jacks provided on the faceplate of the Model 3161 DSU/CSU are the same in function as those provided on the front panel of the 3160/3164 DSU/CSU (see Figure 1-5). Other front panel functions, including a keypad and LCD, are provided by the SDCP of the 3000 Series Carrier. These SDCP functions are described in the COMSPHERE 3000 Series Carrier Installation Manual.

Model 3161 DSU/CSU Rear Panel

The Auxiliary Backplane, which is installed on the rear of the 3000 Series Carrier, contains the connectors needed for operation of the 3161 DSU/CSU (see Figure 1-6). This Auxiliary Backplane can be used by both 3151 CSUs and 3161 DSU/CSUs; some of the connectors shown (i.e., data port and external clock connectors) apply only to 3161 DSU/CSU applications. The 3161 DSU/CSU connectors and their functions are listed in Table 1-2.

Table 1-2

Select	OK
	Fail
	Test
	Sig
Net	OOF
	Alrm	12
	EER	LEDS
DTR	Sig
TXD	OOF
RXD	Alrm
CTS	PDV
RTS	BPV
In
Net
Out
In		6
Net
		TEST
Mon
		JACKS
Out
In
Eqp
Mon
Out

DSU/CSU

3161

496-14543-01

Figure 1-5. 3161 DSU/CSU Faceplate

	Auxiliary Backplane Connectors
Connector Name	Function
DTE	A DB15 socket, screw-type connector for T1 DSX-1 (DTE) equipment.
NETWORK	A 50-pin, RJ48H plug that provides connection to the T1 network for all eight slots supported by
	the Auxiliary Backplane.
CLOCK IN	A DB9 socket that attaches an external clock to the DSU/CSU. The external clock provides timing
	for up to eight slots. Each Auxiliary Backplane must have its own external clock input.
PORTS 1 and 2	A DB25 socket (EIA-530A) that connects to the synchronous data DTE.
	The Port 2 DB25 socket connector allows one slot in the carrier to be configured as the COM port,
	which replaces the functionality of the second data port. The COM port is a communications port
	that provides access to Front Panel Emulation software running on a locally connected PC or
	async terminal connection for DSU/CSU devices on an Async Terminal Interface.
MANAGEMENT	An 8-pin modular jack that provides management connectivity between Auxiliary Backplanes in a
	carrier.

1-8 December 1996 3160-A2-GB22-10