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Do I need Best Effort COSP from data vendor?

I am about to order a private 1.5 MBps connection between our SF and LA offices from TelePacific. They have a service they call OneNet over a private MPLS Ethernet circuit. TelePacific is offering to provide me best effort CoSP. We will have ShoreTel VOIP and Citrix traffic moving over this line. The VOIP traffic is more important to the business than the Citrix traffic, but I don't expect either to go near the bandwidth capacity. It's only four users and up to eight phone calls. There will also be some VPN or other traffic going over this line.

I will have SonicWall appliances on both ends. They are charging $50 a month in SF and LA ($1,200 a year) for this "quality of service." It's a private line, so do I need to pay for this CoSP service or could I easily configure the SonicWalls to do the QoS between themselves over this line?

And does anybody know what COSP is versus QoS?

- Elan

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amatson78

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sweetseater

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Thanks. I asked them if they preserve DSCP tags. My understanding of it being a "private" line is that we are guaranteed 1.5 Mbps and no other data is being transferred on the "circuit." It's like a VPN without the overhead. I guess it does traverse over cables and switches of other companies on their network, but my understanding is that it does not "compete."