[pjsip] error (PJ_ERESOLVE) in iPhone

[tech guy]

Hi All,

I am using pjsip for iPhone. I got registered properly but sometimes i get
error in registration.

 pjsua_acc.c  Account <destination> added with id 2
 10:06:25.685  sip_resolve.c  Failed to resolve 'Sip.tellustelecom.com'.
Err=70018 (gethostbyname() has returned error (PJ_ERESOLVE))
 10:06:25.686    tsx0x87e664  Failed to send Request msg REGISTER/cseq=50734
(tdta0x89aa00)! err=70018 (gethostbyname() has returned error (PJ_ERESOLVE))
 10:06:25.686    pjsua_acc.c  SIP registration failed, status=503 (Service
Unavailable)
 10:06:25.687      sip_reg.c  Error sending request, status=70018
 10:06:25.687    pjsua_acc.c  Unable to create/send REGISTER:
gethostbyname() has returned error (PJ_ERESOLVE) [status=70018]

Is this slow network connection related error ? And how to solve it ?

Thanx
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