Yes, you can! Please follow the instructions below to remote program (remove first line if local programming):
* # 1234 (wait for beep)
* * * (wait for beep)
* * 9 * * (wait for beep)
* 9 * 1 * * 200 * number1 * number2 * * (wait for beep)
* 5 * 1 * 0030 * (wait for beep -- waits 3 seconds delay between number1 and number2)
* * 235 * (wait for beep)
* * 27 * * (waif for beep -- allows loud dialing tone, optional)
Hangup