NEC SV8500, Operation And Maintenance Manual

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CHAPTER 2 Operations of SV8500 Server
12.1.2 Examples of Using Logs
<Trouble 1 - When All of the DtermIP are logged out- >
(1) Brief
All the DtermIP are not available for a short time.
(2) Cause
Because DHCP server had sent back NACK, DtermIP has performed autonomous reset.
(3) If Fault Log Collection Function is used
From logs occurred when re-registration has been completed, it can be analyzed that all of the DtermIPs have
performed autonomous reset around the same time because the valid term for IP addresses provided by DHCP
server had been expired. (This includes terminals that received NACK indicating 50% of the valid term has
passed.)
<Trouble 2 - No tone/One-way Speech>
(1) Brief
When DtermIP originates call via MC-MG (COT), sometimes no tone is heard.
(2) Cause
While peer-to-peer connection was being handled, timeout of H.245 sequence occurred due to packet delay/loss.
(3) Using Fault Log Collection Function
Logs are output when errors occur in established peer-to-peer connection. From these logs, it can be determined
that connection handling is abnormal.
(4) Using Communication Log Collection Function
From logs caused for peer-to-peer disconnection, RTP arrival status on end points can be recognized.
Use fault logs to solve the problem.
Use fault and speech logs to solve the problem.