Sending long SMS messages using SMPP

[John1977]

Hi All,

I want to send messages longer then 160 characters using an SMPP connection. How do i have to split the messages ?

[Dookie]

Here we go again!!

SMS stands for "Short Message Service". Short means under 160 characters. Even if you manage to pile 161 characters in a 160 character message, it will get killed if it gets out of the SMPP world and into the C7/SS7 network. SMSCs dump long SMS messages when they get them, and do not return errors.

LUDT and XUDT are options, but these are not supported everywhere, meaning that the recipient could receive a "long" short message (oxymoron) in one place, but not another.

Another option is segmentation, but it's not supported on every mobile phone, and sometimes charges the recipient twice for one message.

There is only one solution: Use email.

[KevinMasters]

Some providers accept the message and automaticly split it in half. It sents a bunch of paramters along with the message and that way you mobile phone is able to see it as a single message. I Believe those parameters are called UDH Parameters.

MCTel in monaco is a provider which does this.

There is a dutch company called activexperts on whos website i found some more information about this:

http://www.activexperts.com/activsms/sms/multipart/

[Howard586]

Using UDH is always an option as has been mentioned in the last reply, but this will probably work only in GSM networks.

[Heavy_Herbert]

[quote="John1977"]Hi All,

I want to send messages longer then 160 characters using an SMPP connection. How do i have to split the messages ?[/quote]

Since SS7 is used to connect systems within networks, and SCCP and Gateways and Carriers around the world, the only way to get long messages through is either segmentation, or XUDT/LUDT. I do not list them as options, only that these are the only SS7 based messages that can support MO_FSM with more than 160 characters.

[John1977]

He Herbert


What is XUDT/LUDT?

[Leon]

XUDT = Extended Unitdata ( SS7 )

[london14]

contact the guys at peekamo.com , they do this kinda stuff. they are a mobile social network and they manage to provide a free text service.

http://peekamo.com/

[maxoutrage]

Usually an SMSC can be configured to accept messages greater than 160 character as this is over IP and the SS7 restrictions do not apply. So, its possible to either send in a short message greater than 160 characters or using SAR send in message segments up to a maximum limit as defined by the SMSC.

On delivering a 'extended' short message to a handset the SMSC will deliver the message 160 characters at a time.

The same now applies to modern handsets. Its possible to send a short message that is greater than 160 character with the handset segmenting the message using UDH.