You can add phone number as extension. You need to enter the number in particular format mentioned below.
If the save fail with an error "Number is invalid", then check the number and enter the number as per format mentioned below.
PSTN lines route out as an outside line and will be charged per minute.
Please check the Zaplee Billing tab whether you have funds to route calls to phone.
For numbers within the US
Enter 1 <area code> <number> (numbers only, adding symbols will cause errors in your routing)
Example - 15554443322
For numbers outside of the US
Enter 011 <country code> <area code> <number> (numbers only, adding symbols will cause errors in your routing)
Example - 0115554443322
Please do not add dashes, plus signs or spaces