Kannel - Sending Multipart Messages

Question

I'm hoping someone can shed some light for me on multipart sms's.

Currently the below configuration in kannel works fine for sending a message to the mobile device if the characters are less than 140 characters. What I would like is that if the message contains 140 characters for the message to be delivered to the mobile handset as 1 SMS Message as opposed to 2 or 3 seperate SMS messages.

The guidance I have gotten from our upstream SMPP provider is "sar_msg_ref_num is required to build up the multipart message".

But I have no idea where to start to configure kannel to meet that requirement.

Any tips or pointers to the relevant material will be much appreciated:

group = core
admin-port = 13000
smsbox-port = 13001
admin-password = bar
dlr-storage = mysql
log-file = "/var/log/kannel.log"
log-level = 0
box-deny-ip = "*.*.*.*"
box-allow-ip = "x.x.x.x"
sms-combine-concatenated-mo = true

#iTouch SMPP Server

group = smsc
smsc = smpp
smsc-id = iTouch
interface-version = 34
host = SMPP_PROVIDER
port=9500
smsc-username = SMPP_USRNAME
smsc-password = SMPP_PASSWD
system-type = kannel
transceiver-mode = true
msg-id-type = 0x01
throughput = 15

group = smsbox
bearerbox-host = x.x.x.x
sendsms-port = 13013
log-level = 0

group = mysql-connection
id = mydlr
host = localhost
username = kannel
password = **********
database = kannel
max-connections = 1

#DLR DB GROUP
group = dlr-db
id = mydlr
table = msg_pending
field-smsc = smsc
field-timestamp = ts
field-source = source
field-destination = destination
field-service = service
field-url = url
field-mask = mask
field-status = status
field-boxc-id = boxc


group = sendsms-user
        username = linux
        password = t3mp0
            max-messages = 3
            concatenation = 1
            default-sender = 99999999

Answer 1

In the following kannel 1.4.3 documentation:@ Kannel 1.4.3 documentation , In SMS-service group, set the following parameter: concatenation bool (Long messages can be sent as independent SMS messages with concatenation = false or as concatenated messages with concatenation = true. Concatenated messages are reassembled into one long message by the receiving device.)

e.g:

max-messages = 3 
concatenation = true

If we omit this parameter, then kannel will simply send the first 160 chars and omit the rest of the message.