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| |When set to 1, Don't send dial tone, voice responses, just try to connect the call. | | |When set to 1, Don't send dial tone, voice responses, just try to connect the call. |
| |} | | |} |
| + | |
| + | == Simplex Autopatch == |
| + | For nodes with duplex set to 0 or 1, Simplex Autopatch operation is supported. |
| + | |
| + | This is accomplished by using a VOX on the audio coming from the telephone call, |
| + | |
| + | because of the half-duplex nature of the node. To avoid having audio from the |
| + | |
| + | telephone call keep the transmitter engaged for extended periods of time (if there |
| + | |
| + | is some source of continuous audio), there are two time-out values. One is the |
| + | |
| + | Vox timeout, which is the maximum amount of time that the VOX can hold the transmitter |
| + | |
| + | engaged, which by default is 10 seconds. The other one is the Vox recovery time, which |
| + | |
| + | is the amount of time that the Vox is disabled during times of continuous audio, after |
| + | |
| + | the Vox timeout, which is 2 seconds. So, during continuous audio, it transmits for |
| + | |
| + | 10 seconds, then stops for 2 seconds (so that you can transmit to it and perhaps |
| + | |
| + | disconnect the call), then transmits for another 10 seconds, then stops for 2 seconds, |
| + | |
| + | and so on. |
| + | |
| + | Additionally, to prevent 'chop-off' of the first syllable or two of the audio from the |
| + | |
| + | telephone call, we delay the audio to allow for the transmitter to start transmitting |
| + | |
| + | and any CTCSS tones to be decoded. This delay is typically 500ms, but can be adjusted |
| + | |
| + | via the 'simplexpatchdelay' parameter. It is specified in units of 20 milliseconds. |
| + | |
| + | These time-out values may be overridden by using the following configuration parameters |
| + | |
| + | located in the [<node-number>] section of rpt.conf: |
| + | |
| + | [1999] |
| + | |
| + | . |
| + | |
| + | . |
| + | |
| + | . |
| + | |
| + | voxtimeout = 10000 ; vox timeout time in ms |
| + | |
| + | voxrecover = 2000 ; vox recover time in ms |
| + | |
| + | simplexpatchdelay = 25 ; Delay for transmit while in patch in 20ms increments |
| + | |
| + | . |
| + | |
| + | . |
| + | |
| + | . |
| + | |
| + | If not specified, it uses the default values as specified above. |