Tektronix K1103 pinout of the E-1 interface

Hello Everybody, we have several Tektronix K1103 protocol analyzers standing around here and it was quite complicated to get the pinout of the SUB-D 9 connectors. Monitor A: Pin Purpose 9 RX+B 4 RX-B 6 RX+A 1 RX-A 2,3,4 GND A = E-1-Linecard -> BTS B = BTS -> E-1-Linecard Monitor C: 9 RX+D 5 RX-D 6 RX+C 1 RX-C 2,3,4 GND Telephone socket: 1 mic input (-) 2 hearer output (+) 3 hearer output (-) 4 mic input (+) Factsheet of this analyzer: http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&lc=EN&ci=14411&… Holger