The Mizutech VoIP tunnel can work well with any ISP from any country and currently is used with the following ISPs:

UAE: ETISALAT, DU (Dubai, Abu Dhabi, etc)
BANGLADESH: CITECHO.NET,  ADNSL.COM,  BUCT, BTTB
OMAN: Oman Telecommunication
QUATAR: Qtel
CHINA: Shanghai Telecom
BRASIL: Brasil Telecom
EGYPT: TEDATA.NET,  ALL-ZONE-DSLTE,  EGYPT CENTERS,  LINK.COM.EG
IRAN: IRANCELL,  ROHAM PARS,  SEPANTA.NET,  TEHRAN
PAKISTAN: NEXLINX.NET.PK,  DSL.NET.PK,  WORLDCALL.NET.PK
GUYANA: GT&T
MEXICO: Telmex
EL SALVADOR: AMNET US
SRI LANKA: EXCEL PACKAGE
ETHIOPIA: TELECOM.NET.ET
ALGERIA: RAYAALGERIE.COM
SUDAN: KANARTEL,  AFRINIC
YEMEN: EMENNET
WEST AFRICA: GAMBIA (GAMTEL.CO), SENEGAL, MALI
Other countries: Guyana, Kuwait, Malaysia, Mexico, Panama

Filters: NARUS, VERSO, BlueCoat, Sonicwall, Bitek, Packeteer, ipoque
 

VoIP tunneling