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Hello Sarfaraz,

If you have not done so already, please install the latest version of Diafaan SMS Server and remove the SMPP plugin if you are still using it. The new functionality in the SMPP Gateway will not be used if you still have the SMPP plugin installed. Diafaan SMS Server 2.1.3 contains two important bug fixes for SMPP which might also affect the timing of sent messages and the message response.

I have checked the timing on a test SMPP server on a virtual machine that is time synchronized with the computer where Diafaan SMS Server runs but I don't see a time difference between the log of Diafaan SMS Server and the log of the SMPP server. The send time of the message in the Diafaan SMS Server logs is the time when the submit_resp is received by Diafaan SMS Server. There might be a short delay in processing the submit_resp packets when Diafaan SMS Server is busy but this should not be more than 1-2 seconds.

I am curious what you see in the communication log for the SMPP Gateway (see http://www.diafaan.com/how-to/log-modem-problems/ on how to create a communication log). Is the submit_resp time the same as the send time in Diafaan SMS Server or as the time in the logs of the SMPP server?

Regards, Henk