Can I use LRE and xDSL on the same 50-wire cable bundle?
A. LRE can exist in the same 50-wire bundle with xDSL when LRE public profiles are used. Bandwidth within the LRE link is controlled by the switch by using configurations called profiles. An LRE profile configures the upstream and downstream rates on the LRE link. The Catalyst 2900 LRE XL switches are shipped with predefined profiles, categorized as public (global) mode and private (per-port) mode. By default, all LRE ports on the switch are enabled with the LRE-10 private profile. LRE and xDSL cannot coexist on the same wire because they share the same frequencies. Note that if the xDSL signal is “noisy” it may cause crosstalk. Even if it’s running on another pair of wires in the same bundle as the LRE cicuit, it could limit the reach of the LRE devices.
