sundance-communications.com/forum Forums Other TDM Phone Systems Executone-Isoetec Telephones & Systems Longest phone line? 228 system

I have a 228 system with standard Stn cards for system phones. What's the longest wire run I can use? Also, is there a difference between an SLI and an Sli card? (As reported from the "F" menu) The cards look a little different in their layouts. Is one better for longer runs? (I WANT to run a system phone a long distance, but if all I can run is POTS phones, then I will do that!) Or, :rolleyes: is there a card, and a box for the other end, that will allow, say, 4 extensions to be carried over fiberoptic?

Thanks!
-Jon

An SLI card is a 12 port analog interface.
An Sli card is an 8 port analog interface.
The 8 port card has true 48 volt opx circuits on it and is suitable for off-premise extensions.
The 12 port card uses less than 48 volts (about 30volts last i checked) and is only suitable for in-house extensions (voice mail ports, fax machines, aswering machines, modems, etc)
Standard Station cards will allow about 2,000 feet of cable to the set.

We have a similar issue where I work.
We use the 8 port opx SLI interface they seem to push the distance. U won't be able to run a Digital Sation much over 2000 with out the PBX wigging out. Go analog and go long single pair to pbx should push just fine.

it depends on your station card The LSI 15750 station card was a long loop station card and would push a phone 2400 feet. It also depends on the cable you are using. The distance is based on resitance. I have installed a 29k display phone 3000 feet fron the KSU with cat5 cable.