SFB Online in Saudi Arabia

Hi 

Middle-Eastern countries are really strict on the use of SIP based internet calls. Its a monopoly between the government and the telco's stating that all PSTN calls should traverse the telecom network and people should not be able to make a free call, or a call that bypasses local telecom call charges. 

For Skype consumer it is easy for the ISPs to block that traffic because its unencrypted, they can see the packets and block them. With Skype for Business it is a little bit harder because the packets are encapsulated by TLS.

However, what you may find is that the ISPs will apply traffic prioritisation policies to throttle suspicious traffic.

However, even if you could get around the restrictions, by bypassing the telco provider you may be commiting an offence that could lead to a fine or prison (check out the Dubai story). That said there is nothing stopping you using Skype for Business Online with Cloud Connector Edition. CCE will bridge the gap between cloud hosted accounts and PSTN in/egress localised to Saudi. Therefore when you place your calls to the PSTN you're using the telco in Saudi for it, but taking advantage of internal P2P calling.

This approach is the standardized model for all countries who have Toll-Bypass law enforcement.