Health Check

To ensure that there is always a viable connection in place, tyntec performs systematic checks. This is done by sending SIP OPTIONS requests to the customer‘s equipment.

As a default configuration, tyntec expects a reply back with a 200 OK response code to the SIP OPTIONS requests. In addition, other response codes can be configured upon the customer‘s request.

SIP Request Sent by tyntec

OPTIONS sip:198.51.100.25 SIP/2.0
Via: SIP/2.0/UDP 178.23.25.151:2135;branch=z9hG4bK123456 Max-Forwards: 1
To: 
From: <sip:tyntec@178.23.25.150>;tag=ABCDE12345
Call-ID: 123456
CSeq: 1 OPTIONS
Accept: application/sdp
Content-Length: 0 

SIP Response Expected from Customer

SIP/2.0 200 OK
Via: SIP/2.0/UDP 178.23.25.151:2135;branch=z9hG4bK123456 To: ;tag=123456
From: <sip:tyntec@178.23.25.150>;tag=ABCDE12345
Call-ID: 123456
CSeq: 1 OPTIONS
Content-Length: 0

Important note:

tyntec uses dedicated IP addresses for the health check. These IP addresses need to be enabled in your firewall configuration, in addition to the IP address that is used for normal SIP traffic. For the specific IP addresses, please refer to the Products section in my tyntec.