Past Incidents

Beginning: 26.01.2021 – 09.00 AM

Ending: on going

Impact: Disturbances on Orange mobile

Dear customer, dear partner,

for several consecutive days now, we have noticed multiple and different termination problems towards the Belgian Orange Mobile network. Depsite several differents upstream carrier routes including our SEWAN headquarter and subsidiaries, we keep noticing persistant issues over Orange mobile.

We have raised incident tickets towards the concerned carriers, including Orange, but are still expecting a clear answer on Time To Repair from their side.

Therefore, please note that you may, hopefully on rare occasions, experience audio quality or unexpected cut of calls toward Orange mobile, for which we are doing our upmost best to receive garanties from Orange.

Best regards

SEWAN Technical Team

Beginning: 22.01.2021 – 9.46 AM

Ending: 22.01.2021 – 2.35 PM

Impacts: Outbound mobile calls partially unreachable

Dear customer, dear partner,

Please note that today one of our upstream mobile carrier was, without any valid reason, blocking a significant part of our outbound Belgium mobile traffic. As we have in place multiple failover scenery, most of the calls blocked were mitigated toward other carriers.

Nevertheless, part of the traffic sent to the faulty upstream carrier was sending back to us an incoherent error code (403. Forbidden) which we (as all other telecom carriers) consider a user based return code (meaning a code stating that the recipient of the call does not want to accept it).

Therefore, this wrongly given code made our system consider as a normal behave and, therefore, did not trigger failover routings.

When we discovered this double fault, we temporarily adapted our routing, and raised an emergency case toward the upstream carrier for investigation.

Best regards; SEWAN Technical Team

Beginning: 21.01.2021 – 11.05 AM

Ending: 21.01.2021 – 11.46 AM

Impacts: External backbone network supplier DDOSed

Dear customer, dear partner,

Please note that since 16/01/2021, one of our backbone network supplier is experiencing DDOS attacks. Until this morning, all our failover systems have been able to mitigate their problems in order to not impact our services in any kind;

Nevertheless, since this morning 11.05AM, we have noticed that the attacks they are suffering were so intense that we experienced cascaded disturbances, mainly impacting outbound calls.

At 11.46AM, we could get a technical confirmation that the DDOS attacks were mitigated by our supplier. The situation is back to normal, and we are closely monitoring their activities in order to activate backup procedures if this happens again.

Best regards;

SEWAN Technical Team