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Ethernet Extension Experts
For wiring over 1,970ft (600m) you must change DIP Switch 3 from 30a (ON) to 17a
(OFF). For troubleshooting, first examine the backbone wiring pair and make sure you have
solid connections. The Interlink Link LED will be lit solid Green with rapid pulsing on each
850 CPE unit to show proper connection and pairing. If the Interlink Link LED Link is flashing
slow to fast and never goes solid …. Then follow the steps below:
1) Make sure your wiring is straight through and not connected to any Telco punch
down block; If so remove from the block and use Telco butt clips to bridge wire.
2) Check for a firm connection of the RJ-11 connections in each 850 CPE unit and
8950 DSLAM, and power is applied to both the DSLAM and CPE units.
3) You can easily isolate any issue by performing an out of the box test confirm either the 850 CPE
or your wiring. It is possible an outside interference has been introduced into your wiring.
Expected Throughput speeds utilizing CAT5 or better wiring
Up to 700ft (200m)
- 100Mbps Full Duplex
700ft (200m) to 1,350ft (400m)
- 95Mbps Full Duplex
1,350ft (400m) to 1,970ft (600m)
- 75Mbps Full Duplex
1,970ft (600m) to 2,625ft (800m)
- 55Mbps Full Duplex -17a mode
2,625ft (800m) to 3,280ft (1,000m)
- 44Mbps Full Duplex -17a mode
3,300ft (1,005m) to 6,000 (1,828m)
- 30Mbps Full Duplex -17a mode
6,100ft (1,860m) to 8,000 (2,440m)
- 10Mbps Full Duplex -17a mode
Performance Settings
A DIP Switch is provided on the left side of each unit for setting line
performance attributes.
If the Interlink cabling is more than
1,500ft / 457m – Set DIP Switch 3 up
For 17a mode. This optimizes
faster symmetrical throughput at higher
distances.
If the Interlink cabling is less than 1,500ft
457m - the DIP switch 3 must be down For 30a mode
(set to ON) position for the unit to work properly.
Default DIP settings
850 CPE – All down set in the ON position
850 CPE CO – DIP position 1 up (OFF)
DIPs 2-4 down (ON)
DIP 1 – CO/CPE mode
DIP 2 – Fast/Interleave mode
DIP 3 – 30a/17a mode – short distance or
long distance mode
DIP 4 – 6dB/9dB – 9dB mode cleans up the
signal noise ratio on the telephone wiring
