asked on Telnet from linux shell to GSM module has no response message
Hello Expert,
I have GSM module connected to my local network. When I telnet using putty, Every command I send to modem is ok that I issued AT command "atz" and GSM modules response "OK" back to me. please see below
===================
Using putty connect to 192.168.1.111 port 11111
===================
atz
atz
OK
atz
atz
OK
atz
atz
OK
===================
The problem is when I login to my linux server on the same local network and telnet to GSM modules, I can send AT Command but no response message back to me please see below
===================
shell>telnet 192.168.1.111 port 11111
===================
shell> telnet 192.168.1.111 11111
atz
atz
atz
atz
atz
atz
atz
atz
atz
atz
===================
Please help to investigate. Thank you.
I have GSM module connected to my local network. When I telnet using putty, Every command I send to modem is ok that I issued AT command "atz" and GSM modules response "OK" back to me. please see below
===================
Using putty connect to 192.168.1.111 port 11111
===================
atz
atz
OK
atz
atz
OK
atz
atz
OK
===================
The problem is when I login to my linux server on the same local network and telnet to GSM modules, I can send AT Command but no response message back to me please see below
===================
shell>telnet 192.168.1.111 port 11111
===================
shell> telnet 192.168.1.111 11111
atz
atz
atz
atz
atz
atz
atz
atz
atz
atz
===================
Please help to investigate. Thank you.
Embedded HardwareLinux NetworkingLinux
Last Comment
trazodone
ASKER
^E already but nothing changed
Just re-read your post; so it's the telnet daemon that's expected response isn't visible in your client? Are you doing anything specific in putty to change the terminal or emulation type?
ASKER
I know the problem is my shell in my linux server that is "ash" from "synology" custom linux. By the way I don't know how to fix this telnet problem in my NAS.
ASKER CERTIFIED SOLUTION
THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
ASKER
Found answer by myself
http://linux.die.net/man/1
Kind regards.