Hello, P.Schuman! You wrote on Wed, 11 Apr 2007 21:18:22 GMT: ??>>
P> received this note from a CFO friend at an engineering firm ??>>
P> We actually tested the Riverbed accelerators between our AAA, P> BBB, and CCC offices. We were pulling very large CAD files, P> and the time savings was huge. It took seconds to retrieve a file P> rather than 5-10 minutes per file. We are in the process of P> working out an agreement with Cisco to test their equipment next. P> As I understand it, the biggest disadvantage with the Riverbed P> product is that it actually carves out a tunnel in the T-1 line P> for the information to pass through. This could be an issue if we P> decide to go to VOIP for our voice communications. The P> possibility exists that the voice quality would be severely P> affected by the Riverbed product. However, the Cisco product P> works differently and it does not create this problem.
My guess would be that your friend talked to Cisco already :-) Unless I'm missing something, this whole "tunnel" vs "non-tunnel" issue doesn't exist. First of all voice wouldn't get affected at all either with Riverbed or Cisco (given correctly configured QoS policy). Second - I'm not sure if there is any benefit in absence of the tunnel.
With best regards, Andrey.