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The send speed of a GSM modem is limited but Diafaan SMS Server will send the messages as fast as the GSM modem can handle them.

If you use an Android phone with the GSM Modem Emulator it is different. Android has an internal SMS send speed limit to prevent excessive messaging and the GSM Modem Emulator limits the send speed so that the Android block is not triggered.

By default, Diafaan SMS Server will divide the messages over all available gateways using a round-robin protocol. However, for efficiency reasons this is not a pure round-robin, if you need a more precise allocation of the messages over the available gateways then you can set the MaximumBatchSize parameter of each GSM Modem Gateway to 1. But I only recommend this for applications with a low message throughput.

Regards, Henk

Hello Reza,

The GSM Modem Gateway only has a send limit per hour, day, week, month or on a manual reset. If you need to limit the amount of messages per minute you can use the SendDelayTime setting to set a short delay between messages. The Android GSM Modem Emulator app has a delay already built-in.

Diafaan SMS Server uses a round robin protocol to route the messages over the available gateways but it also pre-loads a batch of messages on one gateway to make it more efficient. If you want a pure round-robin then you can set the MaximumBatchSize value of each gateway to '1'.

Regards, Henk