How reduce data consumption

Hi everyone,
We have a product in the market with Quectel EC21-EFA. Our devices are always connected to our web server because we want that our client can access to the remote device anytime. Our linux firmware uses PPP by USB port.We are consuming around 70MB per month only for having the device alive, “standby mode”.
The telecomunications operator say that we always have session opened.
How we should configure the modem OR ppp in order to spend less data?

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/etc/chatscripts/chat-connect

ABORT “BUSY”
ABORT “NO CARRIER”
ABORT “NO DIALTONE”
ABORT “ERROR”
ABORT “NO ANSWER”
TIMEOUT 30
“” AT
OK ATE0
OK AT+QICSGP=1,1,"\T",“xxxxx”,“xxxx”
OK AT+QNWINFO
OK ATD*99#
CONNECT
################################
sudo nano /etc/ppp/peers/dod
/dev/ttyUSB3
921600
nolock
hide-password
nodetach
nocrtscts
noauth
user “xxxxxx”
password “xxxxxxx”
defaultroute
:10.64.64.64
replacedefaultroute
noipdefault
novj
novjccomp
noccp
ipcp-accept-local
ipcp-accept-remote
local
ipcp-max-failure 30
connect ‘chat -s -v -f /etc/chatscripts/chat-connect -T xxxxxxx.m2m’
disconnect ‘chat -s -v -f /etc/chatscripts/chat-disconnect’

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THANKS

Hello javierV, thanks for your question
We have no way to reduce data consumption by configuring modems or ppp. If there is a keep-alive mechanism when the device is in standby, you can try to extend the keep-alive time, thank you.