021Switch the modem power off, then power on.Is the ONH LED always off?Yes No022Restart problem determination. Go to Step 005 on page 4-8.023The modem is defective. Exchange it (see “Modem Exchange Procedure” onpage 4-14).024In the following table, select the action according to your modem status.Modem Status ActionThe message displayed on the modemscreen is not correctRefer to the problem determination chapterin the7857 Modem Guide to Operation,GA13-1839.OH LED is on Go to Step 025.DTR(108) or RFS(106) is off Go to Step 029.025Switch the modem power off, then power on.Is the OH LED always on?Yes No026Restart problem determination. Go to Step 005 on page 4-8.027The modem is defective. Exchange it (see “Modem Exchange Procedure” onpage 4-14).028In the following table, select the action according to your modem status.Modem Status ActionMR LED off The modem is defective. Exchange it (see“Modem Exchange Procedure” onpage 4-14).HS off Suspect a modem configuration.TR off Go to Step 029.029– Check that the cable between the Nways Switch administration station and themodem is correctly connected.MAP 0410 (continued)Chapter 4. Nways Switch Administration Station Problem Determination 4-11
