Connect to 3G modem using Pyserial

[Gicharu]

The following code is supposed to work on my modem, ie dial #777 and start a PPP connection. Am using Pyserial on Python3. However, all I get is " 'b" on CMD, and the modem doesnt do anything. Any ideas?

Code: [Select]

import serial
from time import sleep
ser = serial.Serial('COM25')
ser.write('+++'.encode())
sleep(1)
ser.write('+++'.encode())
sleep(1)
at_command='ATDT#777\r\n'
ser.write(at_command.encode())
sleep(1)