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| A. Troubleshooting |
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| Table |
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| (2 of 4) |
| Modem ± VF Connection | |
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Symptom |
| Action |
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Modem goes |
| Verify that originating modem supports your |
answers, but does not |
| modem's modulation schemes. The 3830 |
connect (continued) |
| modem recognizes V.32terbo, CCITT V.32bis, |
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| V.32, V.22bis, V.22, V.21, Bell 212A, and Bell |
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| 103J. The 3800 Series modem does not |
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| support other vendors' proprietary modulation |
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| schemes. |
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| Use the S41 register to force your modem to |
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| operate at the same modulation scheme as |
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| the originating modem. |
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|
Originate Mode |
| Verify that the modem's DTE Dialer |
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| configuration option is set to the correct |
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| setting: either AT, DTR Dialing, |
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| V.25bis Async, V.25bis Bisync, or |
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| V.25bis HDLC. |
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|
Modem does not go |
| If using AT Dialing, refer to the Table |
| Modem Ð DTE Connection . | |
dialing |
| If using DTR Dialing, verify the telephone |
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| |
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| number stored in directory location 1, and |
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| verify that the DTE is raising DTR from Off to |
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| ON to initiate a dial. |
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| If using V.25bis Async, verify that the correct |
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| |
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| character format is set to 7 data bits with even |
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| parity and 1 stop bit, and the carriage return |
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| and line feed are used as command |
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| terminators. |
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| If using V.25bis Bisync, verify that the correct |
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| |
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| character format uses two synchronous control |
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| characters and a |
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| before the text block and an |
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| character after the text block. |
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August 1998 |