Retransmission timeout reached SIP trunk?

[killmasta93]

Hi, I was wondering if someone could shed some light on the issue im having. Currently running asterisk with granstream PSTn Gateway 410x. Currently was working well for the past 2 years no issue. And today so odd the Trunks keeps disconnecting. I check though verbose once i reboot the 410X and connects then around 2min it disconnects. Currently have 3 trunks

This is my conf

 Trunk name 254XXXX
  type=friend
secret=password
host=dynamic
context=from-trunk
   nat=no
   canreinvite=no
   dtmfmode=rfc2833
   qualify=yes
   insecure=very

https://ibb.co/fcAWu7

When i run sip debug im getting this

Retransmitting #2 (no NAT) to 192.168.1.253:5060:
OPTIONS sip:[email protected]:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP 192.168.1.252:5060;branch=z9hG4bK42aff699
Max-Forwards: 70
From: "Unknown" <sip:[email protected]>;tag=as177678ac
To: <sip:[email protected]:5060;transport=udp>
Contact: <sip:[email protected]:5060>
Call-ID: [email protected]:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-2.11.0(11.13.0)
Date: Thu, 19 Apr 2018 03:54:59 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Length: 0

Thank you