MultiModemDID User Guide |
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| Chapter 4 - AT Commands, |
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Command: | *DT | Wait for Digit | |
Values: |
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| n = 0, 1, 2 or 3 |
Default: |
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| 0 |
Description: |
| This command is used to configure the time between each | |
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| digit the modem will wait. If the modem has not received the |
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| proper number of digits when the timer expires, it will report |
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| the digits it has received so far and move on to the answering |
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| sequence described in the *DN command. |
Command: | *DN | Number of DID Digits Expected | |
Values: |
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Default: |
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| 0 |
Description: |
| This command is used to configure the modem for the | |
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| expected number of digits from the central office (the central |
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| office will send the last few digits of the called number). When |
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| the proper number of digits are received, the modem will pass |
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| the digit information to the host computer. After passing the |
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| digits the modem will answer the incoming call if S0 is greater |
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| than 0. Otherwise the modem will wait for the host computer to |
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| issue an ATA command. |
Command: | *DW |
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Values: |
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Default: |
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| 0 |
Description: |
| This command defines the amount of time to busy out the | |
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| modem upon disconnecting from a DID call. The delay is ended |
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| when the timer runs out or a *DS command is received. |
| *DW0 This command disables the delay. It ends the delay, but it also | ||
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| places the DID line a |
| *DW255 This command will extend the delay indefinitely. | ||
| About the | ||
| A Direct Inward Dial (DID) line can be put in a “Busy Out” state by | ||
| reversing the battery polarity the modem supplies to the line. This will | ||
| cause a caller to receiver either a busy signal in a single line system or | ||
| roll over to the next line in a trunk system. | ||
| The line is busied out in the following cases. | ||
| - | Modem is set to the factory default DID start format *DS0 | |
| - | Modem receives an incoming ring on the POTS line | |
| - | Modem is given the dial command ATD | |
| - | Modem is set with the *DW command to | |
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| finishing a call | |
Command: | *DD | Digit Format | |
Values: |
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| 0, 1, 2 |
Default: |
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| 0 |
Description: |
| This command is used to configure the modem for the format | |
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| the central office will send the incoming digits. At this time, only |
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| DTMF is supported. |
| *DD0 | DTMF | |
| *DD1 | Pulse | |
| *DD2 | MF (MultiFrequency) | |
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