Table 4: AT+ (Plus) Commands
Command | Option | Description |
|
|
|
| 0 | Use the maximum rate of the specified modulation |
|
| mode |
| 300 - 60000 | bps |
|
|
|
+PCW |
| Call Waiting Enable |
|
|
|
|
| This option controls the action to execute upon |
|
| detecting a call waiting signal. |
| +PCW=0 | Toggle the RI signal and collect Caller Identification |
|
| if enabled |
|
|
|
| +PCW=1 | Hang up the modem |
|
|
|
| +PCW=2 | Ignore the call waiting ID signal |
|
|
|
| +PCW=3 | Disable call waiting detection. |
|
|
|
| +PCW=? | Display Call Waiting Status |
|
|
|
+PMH |
| Modem on Hold Enable |
|
|
|
|
| This command controls the enabling of modem on |
|
| hold execution. |
|
|
|
| +PMH=0 | Enable modem on hold |
|
|
|
| +PMH=1 | Disable modem on hold negotiation. |
|
|
|
| +PMH=? | Display Modem on Hold Status |
|
|
|
+PMHT |
| Modem on Hold Timer |
|
|
|
|
| This command controls whether to grant or deny a |
|
| remote modem on hold request. If the request is |
|
| granted, it also controls the amount of time allowed |
|
| for the timeout. |
| +PMH=0 | Deny remote requests |
|
|
|
| +PMH=1 | 10 seconds |
|
|
|
| +PMH=2 | 20 seconds |
|
|
|
| +PMH=3 | 30 seconds |
|
|
|
| +PMH=4 | 40 seconds |
|
|
|
| +PMH=5 | 1 minute |
|
|
|
| +PMH=6 | 2 minutes |
|
|
|
| +PMH=7 | 3 minutes |
|
|
|
| +PMH=8 | 4 minutes |
|
|
|
| +PMH=9 | 6 minutes |
|
|
|
| +PMH=10 | 8 minutes |
|
|
|
| +PMH=11 | 12 minutes |
|
|
|
| +PMH=12 | 16 minutes |
|
|
|
| +PMH=13 | Indefinite |
|
|
|
22
