Custom SIP not working for Outbound with Telnyx
# supportm
Mathias
11/13/2024, 11:46 PMDear VAPI team. I recently received a tutorial on how to setup custom SIP but the suggested authentication method for outbound doesn’t seem to work with Telnyx. Whitelisting IP is not possible without adding extra layer of authentication as personalized Termination URI is not available as in twilio.
Do you know if any user managed to integrate Telnyx for outbound? We would greatly appreciate if you could share some light over this matter as Telnyx is 5 to 10x cheaper than vonage/twilio for many of our clients in Europe and Latam.
Mathias
11/14/2024, 2:31 AMthis is the error message I get while trying to whitelist vapi’s ips:
"Termination Endpoint": There is another Connection with the same IP address already assigned to an Outbound Voice Profile. Connections should be unique so that they can be properly identified. Connections can share the same IP address as long as they have a unique combination with either a Tech Prefix or a Token. The IP address port is not used for authentication purposes so it doesn't make a Connection unique
Mathias
11/14/2024, 3:49 AMTelnyx also allows credentials (user/password) as outbound auth, but I couldn’t find this option in vapi
s
Shubham Bajaj
11/15/2024, 10:51 AMHey @Mathias allow me a day time to create a documentation on SIP using telenyx for outbound calls.
m
Mathias
11/15/2024, 2:50 PMThank you @Shubham Bajaj
Do you know if call transfers would work properly with telnyx? I assume we’d need to use tech prefix as outbound authentication, so call transfers would also need to include it. Please let me know if any extra setup is required for call transfers to work. Thank you
s
Shubham Bajaj
11/15/2024, 3:05 PM@Mathias I haven't tested the call forwarding but once I will do let you know, and your right regarding the use of tec prefixes.
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