Motorola V.34-SDC manual Electrical Interfaces-EIA/TIA-232 and ITU-TS, Operating at V.34 DTE Rates

Installing the Modem

Appendix B

LEASE DIAL

PHONE LINE LINE

		NC
1 2 3 4 5 6		DTE
1 ON 6	OUT
		IN

	Factory Preset 6-Position
	DIPs are Off (Up)
1 2 3 4 5 6

Figure 2-3. 3261/3266 Modem Rear Panel Layout

Electrical Interfaces—EIA/TIA-232 and ITU-TS V.35

Caution

Ensure that the electrical interfaces of the equipment you connect to the modem are compatible. Incompatible interfaces may seriously damage the modem. Motorola makes no guarantee of the equipment’s integrity if you do not ensure that compatible inter- faces are used. If your DTE has a different interface, you will need an external converter cable.

326X Series Modems have an EIA/TIA-232/EIA/TIA-562 electrical interface for connection to external equipment. For compatibility with DTEs that have a V.35 interface, the V.34-SDC Modem is also available with the optional ITU-TS V.35 Recommendation electrical interface.

The rear-panel DTE port is configured at the factory for either interface. Both interfaces are not available in a unit. Regardless of the interface, external DTEs are connected through the modem’s rear-panel DTE port.

NOTE: When operating with the V.35 interface, DIP switch S1 must be set to the off (up) position (see Figure 2-2or 2-3).

To purchase a compatible cable, consult Appendix B.

Operating at V.34 DTE Rates

To operate V.34 or V.34-SDC modems at DTE rates greater than 19.2 kbps, you must use cables that can handle the higher data rates. Refer to Appendix B for instructions on determining the correct cables to use.

2-6 Installing the Modem