Routerboard and US Robotics 5686

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US Robotics 5686

To issue the following commands you'll need a laptop/desktop with a serial port that supports hardware flow control. Also you'll need a DB25 to DB9 converter for the modem. First ensure that the dip switches have the following configuration on the back of the modem: 1-UP, 2-UP, 3-DOWN, 4-UP, 5-DOWN, 6-UP, 7-UP, 8-DOWN. Now you can connect everything and open a serial terminal with the modem at 115200bps 8N1. Once you connect to the modem issue the ATH command and you should receive an OK. If the modem does not respond with OK double check you connections and the dip switch settings. Now you are ready to configure the modem by issuing the following commands, all commands should respond with OK:


AT&F2 -- Resets to factory default configuration with software flow control

AT&W0 -- Write to NVRAM configuration 0

ATY0 -- Starts modem with NVRAM configuration 0


After the commands are set power off the modem and change the 1st dip switch to down. So the dip switches should be configured at follows, 1-DOWN, 2-UP, 3-DOWN, 4-UP, 5-DOWN, 6-UP, 7-UP, 8-DOWN.


RouterBoard

On the RouterBoard you'll need to make a few configuration changes which consists of disabling the system console so it's available for PPP and enabling software flow control on the serial port.


/system console print
/system console disable 0
/port print
/port set 0 baud-rate=auto data-bits=8 parity=none stop-bits=1 flow-control=xon-xoff


PPP configuration

Now you should be able to successfully connect the modem to the RouterBoard and be able to dial out. How to connect your office network with Dial-up Modem/Connectivity