I need recomendations from you. I have a client whose satellite office has a dedicated t1 to HQ. The Voice and data traffic passes via the T1 at this time. Satellite office got its own DSL line for internet and has VPN tunnel to HQ as backup . For Quality purposes, Iam planning to go for QOS on T1 for voice ports, but client has some idea of Using purely T1 for voice and pass the data traffic via VPN tunnel ((for ex: using BGP).
Also, Both T1 & tunnel should act as backup to eachother (incase of Internet/T1 failure). Will you please suggest it as good idea..?