0049-0117-100 DSP9612 Flash Poll Modem – User Guide
10/12/2011
Rev. F1
Page 20 of 44
When the modem is configured for V.23 operation (SW2-1 ON), the RTS-
CTS delay is fixed at 33 ms.
SW2-6
⎯
FSK CD Delay (Bell 202 Mode Only)
SW2-6
ON = 23ms
OFF = 6ms
SW2-6 selects the FSK CD delay and is valid when Bell 202 mode is
active (SW2-1 OFF). Setting SW2-6 ON configures the modem to turn on
CD 23 milliseconds after it detects a valid carrier signal. Setting this switch
to OFF configures the modem to turn on CD 6 milliseconds after it detects
a valid carrier signal.
This switch setting is deactivated when the modem is configured for V.23
mode (SW2-1 ON) and a delay of 18 milliseconds is used instead.
SW2-7
⎯
Remote Loopback
SW2-7
ON = Loopback enabled
OFF = Loopback disabled
During instances of channel noise, the modem may mistaken a received
preamble as a request to go into remote digital loopback. Setting SW2-7
to OFF prevents the modem from participating in a remote digital loopback
with another modem. SW2-7 does not prevent the modem from sending a
remote digital loopback request to a remote modem.
SW2-8
−
Reserved (Test Only)
SW2-8
Must be OFF
SW2-8 must be in the OFF position for normal operation.
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