[SIPForum-discussion] server response 503

[Jing Jiang]

My VoIP phone is registered to Asterisk server, and I turn power off.
After I turn power on, my VoIP successfully re-registers to the proxy.
When I make the first call to the phone in the system, I get "503"
response.  The following is the response from the server:

 

SIP/2.0 503 Server error 
Via: SIP/2.0/UDP
192.168.7.221:54910;branch=z9hG4bK4219157283;received=192.168.7.221 
From: <sip:6062 at 192.168.7.56>;tag=1066332949 
To: <sip:6015 at 192.168.7.56>;tag=1066332949 
Call-ID: 4113312960 at 192.168.7.221 
CSeq: 972910190 INVITE 
User-Agent: Asterisk PBX 
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY 
Supported: replaces 
Contact: <sip:6015 at 192.168.7.56> 
Content-Length: 0 
X-Asterisk-HangupCause: Normal Clearing
X-Asterisk-HangupCauseCode: 16

 

Does anybody know the reason why the proxy responds with 503?

 

Regards,

Jing

 


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