SIP-Address for Deutsche Telekom

Hi all!

This question is for users of Deutsche Telekom…

I always used tel.t-online.de as Server for the communication via PJSIP.

Today I discovered, that the address does not resolve anymore…

Do someone knows if Telekom changed the endpoint for PJSIP?
What is the new endpoint?

Thanks
Luca Bertoncello

No, tel.t-online.de is correct for “Deutsche Telekom”. I think it is a problem with DNS. tel.t-online.de is not an A record in DNS but a SRV record. it resolves to three entries. I think the main candidate is unreachable or does not respond to SIP.
You can check this with

host -t SRV _sip._udp.tel.t-online.de

You will get three entries like

_sip._udp.tel.t-online.de has SRV record 30 0 5060 nes008-f01-mav-pc-rt-001.edns.t-ipnet.de.
_sip._udp.tel.t-online.de has SRV record 10 0 5060 hmb026-l01-mav-pc-rt-001.edns.t-ipnet.de.
_sip._udp.tel.t-online.de has SRV record 20 0 5060 hno002-l01-mav-pc-rt-001.edns.t-ipnet.de.

Check the entry prio 10 like

ping hmb026-l01-mav-pc-rt-001.edns.t-ipnet.de

If the first entry is not reachable, asterisk should use the second one. As far as I know asterisk uses always the entry with highest priority.

Best regards
Karsten

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