I currently have a pair of Cisco 878's in a back-to-back configuration running absoultely fine with a line rate of approx 4Mbps. The 4-wire (EPS-8 baseband) circuit is provided by BT.
The ever increasing need for speed has sent me towards investigating the newer HWIC-SHDSL cards as they appear to work at an increased line rate of up to 11.3Mbps
I have configured a couple of spare routers (2811 and 1841) with the new HWIC's - both running updated IOS's (to support the new HWIC's)
With the new routers on the bench, using the exact same wiring configuration (wire-mapped using a Fluke) as the current 4-wire circuit the two routers synch and work perfectly on both pairs at 11.3Mbps which is great - happy days!
However , in swapping out the existing 878's for the new routers the circuit refuses to come up - put the routers back on the bench (same config) and it works ... I've even resorted to using a drum of cable between the routers (approx 125m) and they still synch...
I'm confident that the wire-map between the routers is an exact copy of the current live 4-wire circuit from BT (Fluke says so ) so is there some sort of distance restriction of these new HWIC's that is stopping them synching?
All help greatly appreciated ..