Basic Requirements For All Remote Modems (Receiving A Call From The Local Site); Dip Switches; Vortex Initialization String - Polycom Vortex EF2241 Application Note

B R A R M
ASIC EQUIREMENTS FOR LL EMOTE ODEMS
(R C L S )
ECEIVING A ALL FROM THE OCAL ITE
DIP S
WITCHES
Some modems have DIP Switches that control certain features. The settings for
these switches are vital to the proper operation of the modem. Even if the
NVRAM is set correctly, the modem will still look to the state of the switches
upon power-up and can override any NVRAM settings if not set correctly.
V I S
ORTEX NITIALIZATION TRING
Below is an example of an initialization string from a 3Com (U.S. Robotics)
External 56k V.92 Modem. Most modem command sets have many similar
commands, so you can use the example as a baseline to start from. The
commands that typically will differ from each brand of modem are the RTS/CTS
enable commands. Consult the AT Command Set documentation that came with
your modem for the proper command strings.
ATE0F1Q1V0Y0S0=2&B1&D0&H1&R2&W0
AT: Required command prefix to get modem's attention
E0: Disable echo to the Vortex device
F1: Disable on-line character echo from the DTE
Q1: Disable modem from sending result codes to Vortex device
V0: Display result codes as numbers
Y0: Recalls Profile 0 upon modem power-up
S0=2: Modem answers incoming call after two rings
&B1: Modem uses fixed serial port rate
&D0: Modem ignores DTR and turns DTR LED on always
&H1: Enables CTS
&R2: Enables RTS
&W0: Store current configuration in Profile 0 of Modem NVRAM
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