SIP.US offers the PSTN Forward in the event you need to route all call traffic to an external phone number (such as a cell phone) and wish to bypass your phone system and all other Call Failover Options entirely. This feature is useful if you’re having issues with your phone system, such as an outage, or need to immediately redirect all call traffic to a new receiving party.
NOTE: Call forwarding occupies two concurrent channels; one for the inbound leg and one for the outbound leg. Your SIP trunk needs at least two channels for a forward to work.
Setting a PSTN Forward in the Customer Portal
Hover of the “SIP Trunking” menu tab and choose the “Phone Numbers” submenu option. The page will load a list of all DIDs on the account. Click on the pencil edit icon next to the DID you wish to place the forward on and then fill out the “PSTN Forward” field with the phone number you wish to forward out to. Be sure to click “Submit” to apply the changes.
It is important that you format the forward with a 1 at the beginning if you are forwarding to a North American number.
Example: 18005669810 (broken up for readability: 1-800-566-9810)
You may also forward to an international number, but your SIP trunk will need to be configured for international calling. Add the country code of the international destination at the beginning of the input number.
Example (UK number): 442039911100 (broken up for readability: 44-203-991-1100)
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