April 28, 2008 12:44 PM BST
i do research in the area of mmwave PTP radios. The site requirement will vary if you have a 2.5G+3G+ WiMAX or if you are BTS hotelling, etc. And will vary dramatically by operator and region and how much overhead they typically provision. Also the capacity at aggregation points in the networks will be dramatically increasing.
I think your 60Mb or 32 E1 capacity for now is ok but all bets are off with LTE sites.