*smsc-id = zoned --> Issue is Here??*
2018-11-09 14:00:20 Receive DLR *[SMSC:airtel]* [SVC:] [ACT:] [BINF:]
[FID:] [META:?smpp_resp?] [from:] [to:260976298808]
[flags:-1:-1:-1:-1:16] [msg:36:NACK/0x0015/Invalid Service Type]
[udh:0:]
According to those above 2 things, I can say you used
try the below smsc settings copy /paste from my kannel server
adjust it as you see fit
# SMSC
group = smsc
smsc = smpp
smsc-id = myid
allowed-smsc-id = myid
preferred-smsc-id = myid
interface-version = 34
host = xx.xx.xx.xx.
port =
receive-port = 0
transceiver-mode = 0
smsc-username = user
s
