AT*R V.13 Remote RTS Signalling
The *R command allows your modem to simulate carrier control on a Synchronous Link by transmitting the local state of RTS to the remote modem.
Some systems rely on RTS as an indicator of Terminal Ready to Send. When modems are inserted between the host and the terminal the status of RTS is not known since the state of RTS is not normally transmitted over the link. The V.13 recommendation allows the state of RTS ito be transmitted over the link by sending a unique stream of data. This stream of data will appear as rubbish to the host (which will discard it), however the receiving modem in V.13 mode will recognise the stream and convey it to the host via the DCD (RSLD) line. DCD high indicates remote RTS high and vice versa.
The local CTS line will mimic the state of the local RTS signal on the local modem.
The remote DCD line will mimic the state of the local RTS signal on the remote modem
☞When this option is selected the modems may take a little longer to disconnect than usual since the normal function of Carrier Detect has been disabled. The modems rely on poor EQM values to confirm disconnect.
☞Not available in FSK (V.21 V.23 Bell 103) modes.
Options
AT*R0 ■ | V.13 mode off |
AT*R1 | V.13 mode on |
See Also
&M command Synchronous Mode
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