sundance-communications.com/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Extension voltage?? each pair

I was wondering what voltage is on each pair of a partner extension??

I am trying to protect the phone as it goes over a DB cable.. Using diteck 66 block snapits.

4/5 I think I can use the SL120v protector
but 3/6 I think I need smaller 75 or 50v

Can anyone confirm??

Thanks
Vinny

I think 4/5 is around -50 VDC and the 3/6 is around -41 VDC.