User guide

Canopy System User Guide BH-BH Links
pmp-0229 (Mar 2013)
101
BH-BH Links
Cambium PTP Bridges communicate with each other using a point-to-point protocol. This point-
to-point protocol uses a 2.5-msec frame. A BH link has higher throughput and lower latency
(typically 5 msec, 2.5 msec in each direction) for two reasons:
Only two endpoints are involved.
No bandwidth request and reservation process is involved.
For 10-Mbps BHs, the aggregate throughput on the channel is 7.5 Mbps. For 20-Mbps BHs, the
aggregate throughput on the channel is 14 Mbps. If a BH is set to a downlink ratio of 50%, then
the bandwidth in each direction is half of the total BH link bandwidth.