for example:

If SmppClient instance is not subscribed to evDeliverSm event the ESME_RINVCMDID will be returned.
If the handler of the event evDeliverSm is failed the ESME_RSYSERR will be returned and the error is written into the library log

You can always use try catch in the event handler method to handle ...

The smpp session will be dropped when unsuccess response status in EnquireLink is received.

In your case the server could be busy with your messages and the EnquireLinkResp is sent later than 19 seconds. The library already processed the timeout and returned the SMPPCLIENT_RCVTIMEOUT.

The detailed ...

What value have you set for the property ResponseTimeout in SmppClient instance?

The EnquireLink PDU is sent only in idle time. It means it will be sent in 20 seconds after last received PDU from the remote side.

Could you provide more detailed logs?

Hi aordonez,

What library version are you using?

Yes, you can deny the connections. You need to check client.RemoteEndPoint in the evClientConnected event.

This code can help you to get the MessageId from the TLV parameters.

There no way to get the MasterSecret from the .NET SslStream.

You can enable verbose logging for the library and find "Received data:" records with received PDUs in hex format.

The data can be decoded on the website https://www.sysop.fr/smpp-decoder/

Dear Jesri,

It can be the wrong DATA_CODING to .NET encoding mapping.
https://docs.inetlab.com/smpp/v2.9/arti ... oding.html

I need to check the SUBMIT_SM PDU you received from the client. Please send the Wireshark file to the support@ .

Hi,

What value has data_coding field in the DELIVER_SM PDU?
I would use the same data_coding in the SUBMIT_SM PDU and set appropriate .NET Encoding in the EncodingMapper for the client.

https://docs.inetlab.com/smpp/v2.9/arti ... oding.html

The outbind was incomplete in the Inetlab.SMPP library.

The version 2.9.18 has additional classes for this feature:

- SmppOutbindClient class that can establish SMPP session with ESME using Outbind command.
- SmppOutbindServerClient class, that passed down to the evClientOutBind event in the ...

Hi,

What kind of proxy are you going to use? SOCKS5?

Hello ojukwu24

For now SmppClient represents one SMPP session with SMS provider. Therefore if you need to establish multiple sessions with one or many providers you need to create the same number of SmppClient instances and attach event handler method to all instances.

It depends on the USSD service implementation on the provider side. I would ask the provider support how it should be sent. When you have an answer, I can help you to complete this with Inetlab.SMPP library.
The answer can be also that the message text is limited to 140 octets.

You can try to send ...

Hi

The date and time format is defined in the SMPP protocol specification.