Use something more secure than my example, else someone could run up your account.
FXO Timer Values (sec) >
c. PSTN Answer Delay: 1
[This causes the SPA3102 to pick up the call in 1 second instead of making you wait the default 16 seconds]
3. Click Submit All Changes
4. After the SPA3102 has booted, verify that both Line 1 Status and PSTN LIne Status have a Registered Registration State when viewed in the SPA3102 Web-UI > Voice tab > Info tab
You want to dial the ITSP 303-555-4444 DID number from anywhere in the world and then continue to dial out of the PSTN-side of the SPA3102 using your PSTN account. This is called a VoIP to PSTN gateway function.
You will actually have to perform what is called two-stage dialing. This is how it works:
1. From anywhere in the world, dial the ITSP 303-555-4444 DID number
2. A properly configured SPA3102 will answer the call and prompt you with a special tone [beeeep, beeeep, ... ...]
3. You dial a preconfigured PIN followed by a #, example 567#
4. The SPA3102 plays dial tone
5. You can dial anywhere in the world using your PSTN account and the callee's caller id will show the caller to be the PSTN 361-555-1212 telephone number.
An International caller in Johannesburg, South Africa (2711) wants to use VoIP to call a Boulder, Colorado (303) ITSP DID number and then make a US national call to San Jose, California (408) using the SPA3102:
1. The 011-555-777 caller dials 001-303-555-4444.
2. The SPA3102 answers the call and plays the PIN prompt tone: beeeep, beeeep.
3. The caller dials 123#.
4. The SPA3102 plays dial tone for its PSTN Line [PSTN side].
5. The caller dials 1-408-555-2222.
6. The called party looks at their phone and sees that they are receiving a call from Corpus Christi, Texas (361)
Configure this VoIP-To-PSTN Gateway behavior as follows: