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eSpace 7870 shows no service

Created: Mar 10, 2016 06:06:04Latest reply: Mar 10, 2016 20:36:42 1315 1 0 0 0

Issue Description

One oversea customer site has more than 500 IP phones, every day has about 50 phones will show No service, those phone are not fixed, everyday different phones has this problems.

Alarm Information

x
convention：
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Adamcolob Created Mar 10, 2016 20:36:42

Handling Process

1. Check the register info , it was correct
2. Capture network package in IP phone side, and found that IP phone send register request info , but didn't received 200 OK feedback from SIP server
3. Capture network package in SIP server side, and found that SIP server received the request info, and send the 200 OK info
4. So it's due to the network problem, because customer do not allowed to capture more packages on switch, they changed the network structure directly, then the problem has been solved.

Root Cause

1. It may due to the register info was not correct.
2. IP phone didn't send register messages
3. SIP server didn't received the messages
4. SIP server has received the register messages, but didn't do any response
5. SIP server has responded, but IP phone didn't received

Solution

Suggestions

When IP phone show No service , that means IP phone didn't register on SIP server successful, then we can follow this step to troubleshooting.

x
convention：

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eSpace 7870 shows no service

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