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SMPP connected but not sending any sms
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July 19, 2018
1:30 pm
Diego Caprino


On the Synway smg4032, the options Transmit and SLR need to be on "Yes" now it's working.

I got back a response from China, they say:
Transmit: When the account reconnected to SMPP account , the unread message during offline will be pushed to the Client.
DLR: Delivery report, the gateway will push delivery receipt from Carrier to the Diafaan, But you need to enable this


July 19, 2018
7:55 am
Henk Helmantel
Forum Posts: 1502
Member Since:
May 28, 2013
sp_UserOfflineSmall Offline

Hello Diego,

Status code 200 'Sent' means that Diafaan SMS Server has sent the message to the SMPP gateway and the gateway has accepted the message. Diafaan SMS Server does not know what happens to the message in the gateway unless it sends a receipt back and I don't see a receipt in the log.

If the SMPP gateway device has a log then you might be able to see what happens to the messages in the log of the device.

Regards, Henk

July 17, 2018
8:55 pm
Diego Caprino


I'm using a Synway SMG4032, 32 channels.

I'm able to send sms from the device admin page. I have enabled SMPP feature, and configured it on Diafaan.

When I send messages from diafaan, they are marked as Sent, but they are not visible on the device admin page on any port, the message is not arriving.

On the device I'm able to enable (on smpp config) Transmit / DLR options (Yes/No)

This is the gateway log:

2018/07/17 15:46:41.426 - Smpp gateway "SMPP CHIP20" started.
2018/07/17 15:46:42.113 - IP connection to: open
2018/07/17 15:46:42.425 > 0000002700000009000000000000003E6368697032300063686970323000534D50500034010000
2018/07/17 15:46:42.503 - command:bind_transceiver status:ok sequence:62
2018/07/17 15:46:42.893 0000003C00000004000000000000003F0001013030303030303030303030000101353431313533373730333534000000000000010000000474657374
2018/07/17 15:47:20.333 - command:submit_sm status:ok sequence:63 source:+00000000000 dest:+541153770354 short_message:test
2018/07/17 15:47:20.661 00000010000000150000000000000040
2018/07/17 15:48:15.885 - command:enquire_link status:ok sequence:64
2018/07/17 15:48:16.025 < 00000010800000150000000000000040
2018/07/17 15:48:16.290 - command:enquire_link_resp status:ok sequence:64

With 3g modems I have no issues.


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