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Support standards-compliant SIP voice. Other requirements relating to SIP to PSTN gateways:Change History:
- This must support making calls to bare phone numbers in addition to SIP URLs. It should do so by appending a default SIP proxy (e.g. 18005551212 becomes email@example.com). This can probably be implemented in the prpl's normalize function.
- Thought should be given to dialing rules. For example, the numbers 1235551212, 11235551212, and +11235551212 may need to be called as firstname.lastname@example.org. If your current country code is 44, then +11235551212 would need to be dialed as 0011235551212. In the case of centrex lines, an initial 9 might be necessary, except for local extensions. The best way to handle this might be to implement a hook for a plugin.
This should probably be implemented using Sofia-SIP. It will probably be easier to replace the existing SIP prpl than to bolt on Sofia-SIP.