SIP (VoIP) stopped working on Cell C?

[rapidblue]

Hi all,

I use a Linksys ATA connected to my Netgear Router (which connects to the net via my Cell C Speedstick). Has been working really well for the past few months
Since yesterday my Linksys ATA won't register with my SIP provider anymore. Regular web browsing still works from my computer though...
Funny enough - when I put a Vodacom SIM in the Speedstick my Linksys ATA connects to my SIP provider...

Has Cell C started blocking ports for SIP now???

 

[rapidblue]

Never mind - working again. Was down for a whole day though...