An acquaintance at a radio station has asked me for a recommendation which query I pass on to my knowledgeable friends here. He wishes to extend a PBX extension over an microwave audio channel (probably does not have E&M capability). He probably needs some FXS/FXO pair with inband signalling. Who vend such equipment and what should he pay for such a pair of cards? Expansive comments welcome. (And if he has E&M, would there be more vendors?)
Thanks for all help. Jeffrey Race
