UDH support for sending large messages about smpp34

[CodeMonkeyKevin]

Would you be able to provide a sample UHD PDU (preferably in hex)?

\Kevin

On Feb 27, 2016, at 03:38, Haisum Bhatti [email protected] wrote:

There's no way of sending UDH data for concatenated sms as described in https://en.wikipedia.org/wiki/Concatenated_SMS#Sending_a_concatenated_SMS_using_a_User_Data_Header

There are other ways like using Sar_* tlv fields or message_payload TLV field for sending concatenated sms but they aren't supported by all smpp servers. Only reliable way is to use UDH headers. Any suggestion on how I might be able to send multiple messages as one big message using this library?

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[haisum]

check https://help.nexmo.com/hc/en-us/articles/204015653-Sending-Concatenated-Messages

and there's a java example here https://itprobes.wordpress.com/2009/09/05/hello-world/

Why you say you cannot? Usually UDHi is sent into the payload of the message itself, after setting the esm_class accordingly.

So you set, by example, esm_class to 0x40, Store&Forward+UDHi, , and then you can prepend the UDHi to the message segment, having care of respecting the syntax for concatenation, which is the same thing the post is saying....

[haisum]

You're right, I did solve this problem as you suggested but forgot to mention here.