USRobotics V.34 user manual Courier High Speed Modems

COURIER HIGH SPEED MODEMS

2.Replace the modem in the case top: ease the voice/data switch into the opening in the front panel and make sure the back of the board rests on the locator pins at the rear (from which you removed the screws).

3.Reconnect the modem's RS-232, power and phone cables, in that order. Be sure the phone cable is plugged into the jack closest to the center of the modem⎯the jack represented by the wall jack icon on the case bottom label.

CAUTION: When you power on the modem there will be potentially hazardous voltage, particularly near the phone jacks. Do not touch the board when the power is on.

4.Power on the modem. Try MI/MIC closure again. Check to see that the Off Hook (OH) status light goes on. If you dialed a number, listen for an answer tone from the remote modem. Then drop the DTR signal. The modem should go on hook and the OH status light should go off.

5.If closure is not working properly, review the steps in this section. Be sure the jumper switches are in the reverse position of those in Figure G-1. If you still have problems, there may be a problem with the phone cable. Or there may be a problem with your hardware.

6.When the equipment is working correctly, disconnect the modem’s RS-232, power and phone cables, and replace the bottom of the modem case. Ease the two nibs near the front corners into their openings in the front of the case top, guide the rectangular slot over the volume switch, and ease the back of the case bottom into place. Replace the two screws, the two vinyl feet, and the volume slide-switch cover.

G-12 Additional Operations