That's the DNS client. I was wondering if there is also a DNS server in the device.
But i already have the answer:
[~] dig @192.168.2.3
; <<>> DiG 9.10.6 <<>> @192.168.2.3
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 972
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;. IN NS
;; Query time: 0 msec
;; SERVER: 192.168.2.3#53(192.168.2.3)
;; WHEN: Fri Apr 12 14:15:22 CEST 2019
;; MSG SIZE rcvd: 17
Now all that is left to do for Teltonica is to create a web interface to configure the DNS server with hostname entries.