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DCP Mode 2 Installation and Administration 11-17
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DM424 Modem Option Settings (Stand-Alone Modem Pool)
Only switch 6 should be in the ON (DOWN) position. There is also a DIP switch at the back of the
modem. All DIP switches should be in the OFF (UP) position. If you change any setting, make sure power
is cycled. This will activate the new setting(s).
The modem initialization string must be entered manually from the keyboard of a 9600 bps terminal
interface. If possible, use a terminal that does not require Data Set Ready (DSR) to be active; however,
most terminals (including the 513 BCT and TELETYPE 5420) require that DSR be active at the modem in
order for them to send characters to it. The DM424 modem has DSR active from the factory, but once the
following initialization string is sent, DSR becomes inactive. [The ‘‘&b2’’ required for stand-alone modem
pool operation deactivates DSR, even though the Modem Ready (MR) lamp would indicate otherwise.]
If you are using a terminal that requires DSR to be active and you need to resend the initialization string for
any reason, or if you want to receive a response as to whether the initialization was successful, you need to
first insert an RS-232 breakout box as described in the RS-232 Breakout Box section.
The initialization string required for the DM424 follows. Spaces have been inserted to improve readability;
they are ignored by the command interpreter.
at&f *s0 *e0 &b2 x1 v0 m0 e0 &w RETURN
The terminal screen will show whether the initialization was successful (if you are using a terminal that
requires DSR to be active, you need to have inserted an RS-232 breakout box in order to see the response).
A successful response is 0. A response of anything other than 0 indicates a fail.
Paradyne 3820 Modem Option Settings (Stand-Alone Modem Pool)
The modem initialization string must be entered manually from the keyboard of a 9600 bps terminal
interface. If possible, use a terminal that does not require Data Set Ready (DSR) to be active; however,
most terminals (including the 513 BCT and TELETYPE 5420) require that DSR be active at the modem in
order for them to send characters to it. The Paradyne 3820 modem has DSR active from the factory, but
once the following initialization string is sent, DSR becomes inactive. [The ‘‘&s1’’ required for stand-
alone modem pool operation deactivates DSR, even though the Modem Ready (MR) lamp would indicate
otherwise.]
If you are using a terminal that requires DSR to be active and you need to resend the initialization string for
any reason, or if you want to receive a response as to whether the initialization was successful, you need to
first insert an RS-232 breakout box as described in the RS-232 Breakout Box section.
The initialization string required for the Paradyne 3820 follows. Spaces have been inserted to improve
readability; they are ignored by the command interpreter.
at&f0 &d2 &s1 \d3 \n0 e0 v0 x1 s41=3 s43=1 s76=1 s78=1 &w0 RETURN
The terminal screen will show whether the initialization was successful (if you are using a terminal that
requires DSR to be active, you need to have inserted an RS-232 breakout box in order to see the response).
A successful response is 0. A response of anything other than 0 indicates a fail.