Patton electronic RocketLink-G NTU Rack Mount G.SHDSL Modem Card, 3088RC user manual

4.5CONNECTING THE MODEL 3088RC/D/V (X.21) SERIAL INTER-

FACE

Model 3088RC/D/V supports X.21 serial port connections. This section describes how to connect the serial ports to your X.21 equipment.

	The interconnecting cables shall be acceptable for
	external use and shall be rated for the proper applica-
CAUTION	tion with respect to voltage, current, anticipated tem-
	perature, flammability, and mechanical serviceability.

Connecting the Model 3088RC/D/V (X.21) to a “DCE” or “DTE” device

The Model 3088RC/D/V provides an X.21 interface on a DB-15 female connector. The X.21 interface default conÞguration is DCE for connection to DTE (data terminal equipment) such as a router. However, the X.21 interface on the Model 3088RC/D/V may be conÞgured as DTE (data ter- minal equipment) for connection to DCE such as a modem or multiplexer. When connecting the X.21 interface of the Model 3088RC/D/V to your DTE or DCE device, use an X.21 straight-through cable.

Remote Model 3088RC

3088RC

RocketLink-G NTU

–Power

–DSL

–TERM

–TM/ER

Remote Local

511 511/E

DSL Span

3088RC
RocketLink-G NTU	Straight-Through 15-pin
–Power		Router (DTE)
–DSL	D-Sub Cable
		OR
–TERM
		Mux (DCE)
–TM/ER

Remote Local

511 511/E

Model 3088RC/D (DCE or DTE)

Figure 16. Connecting the Model 3088RC/D/V to X.21 DTE or DCE

The DCE/DTE strap is located on the daughter board. The arrows on the top of the strap indicate the conÞguration of the X.21 port (for example, if the DCE arrows are pointing toward the front of the rack card, the unit is conÞgured as a DCE). Similarly, if the DTE arrows are pointing toward the front of the rack card, the unit is conÞgured as a DTE.

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