Originally posted by Arthur P. Bloom:
The limitations of using the quad configuration for two CO lines start to manifest themselves after 100 feet or so.
Ditto that. Arthur is once again on the $.
Back in the day I was putting in a lot of OKI Discovery III PBXs. Usually the station gear was either 1A2 or SLTs. On one job I had a number of 2 person offices each having 2, 2 line phones, each phone run with quad - Line 1 on R/G and Line 2 on B/Y. The shorter runs to the MDF worked fine the longer runs had crosstalk.
I resolved the problem by running 1 line on each quad and then running a short quad jumper between the two 42A blocks (with both lines on it). That took care of the crosstalk.
Sam
