[BARC-List] Wiring info for David Systems Expressnet Hub?

[shersey at TheWorld.com]

Folks,
I've recently picked up an old David Systems (now bought out by Cisco)
Expressnet 12-port Ethernet hub (model 6206), which uses a 50-pin Telco
connector for its I/O. Neither searching the Cisco site nor Google
searching has turned up any info on the telco connnector pinout, and I
have no confidence Cisco will respond to inquiries on such an old unit
from a company they once bought. Can anyone suggest places to look for
this info?

Thanks, Steve N1XNX