Enquire Link

EnquireLink is SMPP command allowing to check communication between ESME and SMSC.

The command can be sent by both client and server.

The EnquireLink mechanism assumes sending special SMPP-request by one of the peers obtaining the proper response. When proper response is received with ESME_ROK status, the connection is considered active. Otherwise, if there is wrong response or no response at all - the connection is to be closed.

To enable periodical connecton check, you need to set the following property:

client.EnquireLinkInterval = TimeSpan.FromSeconds(30);

EnquireLinkInterval specifies the time to wait after the last PDU exchange before sending the command. EnquireLink request won't be sent when client and server are sending PDUs.

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Enquire Link