Yesterday, I added MX records to my .tel domain. Works fine so far, so I thought about pimping my SIP URI and I added an SRV record to my .tel domain. My SIP URI is now sip:voip@mcs.tel, this is the required record:

dig _sip._udp.mcs.tel in srv

; <<>> DiG 9.3.4-P1.1 <<>> _sip._udp.mcs.tel in srv
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43321
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;_sip._udp.mcs.tel.             IN      SRV

;; ANSWER SECTION:
_sip._udp.mcs.tel.      86400   IN      SRV     5 25 5060 mephisto.prmg.lu.

;; Query time: 328 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Fri May 29 12:08:06 2009
;; MSG SIZE  rcvd: 71

and it works just fine! Try yourself, call me!