Fax number starting with 3

Similar to the addition of "8" series for mobile number, the new numbering for our fax numbers are in "3" series ie. +65 3xxx xxxx instead of the usual "6" series.

This is because the "6" series are running out and IDA has allocated the "3" series as the new numbering plan.

The "3" series are intended for IP-based service as in our case of internet faxing.