User manual - ICP DAS USA

should modify /etc/ppp/peers/wavecom to define COM port first. Please follow thesteps as below to connect the GTM-201-RS232(GPRS Modem) with RS-232 interface:(1) Type “ vi /etc/ppp/peers/wavecom ”(2) To find the “Serial device to which the GPRS phone is connected:” statement, andadd device name of COM port.(3) Type “ :wq “ to save and quit the script. ( Refer to the Fig. 10-11 )Note: For support 2G GPRS Modem with, please install loadable kernel module―ftdi_sio.ko by insmod command.Fig. 10-11 Part 2Accourding to the GPRS chip default baud rate is “115200” bps, GPRS module anddevice node such as /dev/ttyS2, both of them should have same baudrate. Usercan use ‘stty’ command to set the input and output sepped of the device node.( Refer to the Fig. 10-12 )Fig. 10-12Before startup GPRS, you have to take down the network interface of eth0 andeth1, remove ethernet cable, and type in “ifdown eth0” or “ifdown eth1” to stop it.LinPAC-8x4x SDK:292