In reality, Frame Relay is carried over an ATM backbone in almost all cases. Frame is only used for the local pipe to the first switch. So it really comes down to a costing (and commitments) on that local loop piece, and hardware you need to change out at your end, - versus the pumped up guarantee. So also look at cost up increasing your FR CIR when you do the analysis. You might also run a test to see if you are really affected by the CIR that you have. You might be surprised. Tim Mangan . a former President of the Frame Relay Forum _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Matthew Shrewsbury Sent: Tuesday, September 27, 2005 2:27 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] OT: Frame vs ATM Next year our contract will be up with our current provider of frame. I have been approached by a company that provides ATM host to host or host to Internet access. They say ATM has no CIR and is cheaper as a result. We currently have 5 sites connecting back to our host site using frame relay (384 w 192CIR). From experience has anyone found ATM or Frame to be better then the other..if so why? Thanks for any feedback, Matthew Shrewsbury, MCSE+Internet MCSE 2000 CCA Server+ Senior Network Administrator