Editing esm-class.

Kazumasa Watanabe

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Jun 11, 2025, 8:47:43 PMJun 11

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Is it possible to change the esm-class in Jasmin SMS gateway?

Currently, we are sending SMPP messages from the API, and the esm-class = 3 at the destination SMSC.

We would like to change this to esm-class = 0. Is this possible?

To be precise, I want to change this part of the trace.
スクリーンショット 2025-06-12 094701.png

reference:
5.2.12 esm_class
https://smpp.org/SMPP_v3_4_Issue1_2.pdf

Eng-Ashraf alzyoud

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Jun 11, 2025, 9:07:06 PMJun 11

to Kazumasa Watanabe, Jasmin SMS Gateway

Do u know how in Jasmin or in Ejoin

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Rajesh Chopra

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Jun 12, 2025, 5:00:11 AMJun 12

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Try changing the coding value from 0 to 3 & check in tcpdump if this is changed or not . default value is 0 only

Thanks & Regards

Rajesh Chopra

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Kazumasa Watanabe

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Jun 12, 2025, 8:21:44 PMJun 12

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Hi Rajesh

thanks for your response.

I added the "&coding=3" to the API request URL. but got same result like "Messaging mode: Store and forward mode (0x3)".

2025年6月12日木曜日 18:00:11 UTC+9 Rajesh Chopra:

Kazumasa Watanabe

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Jun 12, 2025, 8:22:04 PMJun 12

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I found info that I can change the esm-class by editing “jasmin/protocols/smpp/configs.py,” but I don't know which part to edit it.