Error 503 Service Unavailable

[zkjadoon]

Hello,

 

I am Zafar Jadoon from Pakistan. I configure my sipura 3102 perfectly with Axon 1.09 and its working properly to receiving and dailing out from my Axon. but I have a little problem that it give a error "503 temporarily service unavailable" I need help to find out this error any body who can help me and tell me the reason behind it.

 

Kindly tell me any body who face the problem like this. when some body dial in on 207 extension which is connected on Sipura 3102 it received perfectly but when I try to dial out from Axon to any physical exchange number like 227, 219, or 333 mostly it give me the error 503 temporarily service unavailable not every time but mostly it give the error.