20 Most Recent Allied Telesyn CentreCOM MR820TR (AT-MR820TR-15A) Networking Hub Questions & Answers

Here is a link to user manual for Centrecom models :
- You may need to directly contact at Allied Telesis to find replacement parts

https://www.alliedtelesis.com/sites/default/files/at-6870_at-6875.pdf

Contact information is at the end of this manual

Capacitor C2 on power suplly board will probably have dried out. Should be 47uf 25Volt electrolytic, mine measured I have replaced this capacitor on 3 of these units and all have come back to life.
Regards, Steve

Are you using the 10Base2 coax outlet, the AIU port or the 8port 10BaseT outlets? Also are you using port #8 which is an uplink port and not meant to be connected to another computer? This hub, although rather old, has auto MDI/MDI-X which can accept either straight or cross-over cabling on ports 1-7 and a switchable port #8. Just make sure your cables are pinned correctly. Otherwise, hubs are meant to JUST work. Although this particular hub MAY prevent/hinder DHCP requests (it does prevent DHCP type Boot LAN requests), which means you might want to try connecting between two computers who have a static IP address and are on the same subnet. ZT3000 "Beta tester of "0"s and "1's"

notify factory and or your it tech as to changing or if able to change

try
usename: manager
password: manager

also try
usename: manager
password: friend

There is no drop in replacement, the model is too old for that. You have 3 options
1 - source a functioning AT-8016F/SC online
or
2 - get the updated version - not entirely the same unit
http://www.pcconnectionexpress.com/1/1/56308-allied-telesyn-international-allied-telesyn-16-port-100fx-sc-l2-switch-w-2-expansion-slots-8516f-sc-10.html
or
3 - redo your entire network and switch to CAT cables and gigabit switches.

how 2 download

"Zappity Zap Zap- We Design That ****"?
"You Can't Spell gEEk without the double E" (Electrical Engineer).

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