# Handling of tel URIs **URL:** \ **Category:** Asterisk SIP\ **Created:** [February 15, 2021, 4:05pm UTC](https://community.asterisk.org/t/handling-of-tel-uris/87573 "2021-02-15T16:05:07Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![david551](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@david551](https://community.asterisk.org/u/david551)\ **Post date:** [February 15, 2021, 6:07pm UTC](https://community.asterisk.org/t/handling-of-tel-uris/87573/3 "2021-02-15T18:07:29Z")
This was discussed recently: > [@Why are chan\_sip and res\_pjsip with the same access data results in an error message](https://community.asterisk.org/t/why-are-chan-sip-and-res-pjsip-with-the-same-access-data-results-in-an-error-message/87320): > > The following problem in the PBX I have noticed and it is the res\_pjsip which outputs a error in the case of incoming calls with the following configuration [transport-udp-nat] type=transport protocol=udp bind=0.0.0.0 local\_net=192.168.1.0/16 local\_net=127.0.0.1/32 external\_media\_address=ipv4 external\_signaling\_address=ipv4 [sip\_reg] type=registration transport=transport-udp-nat outbound\_auth=sip\_auth server\_uri=sip:sip.alice-voip.de [client\_uri=sip:id@sip.alice-voip.de](mailto:client_uri=sip:id@sip.alice-voip.de) contact\_use… --- _[View the full topic](https://community.asterisk.org/t/handling-of-tel-uris/87573)._