North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Maintenance modems and power failures
We have been using a DC powered 28.8 modem made by a company called WTI. It is basically a USR modem ripped open put into a rack mount chassis and converted to take a .25amp DC feed. They have worked well for us so far. -Joe At 01:54 PM 2/10/99 -0600, Sean Donelan wrote: >Hopefully some people will find this related to the operations of their >network. > >Ah, maintenance modems. Why do they always seem not to work just at >the moment you need them. > >PG&E released their report on the San Francisco power outage in December. >Most of it was the information previously reported. One interesting >thing was PG&E lost access to three of their SCADA remote monitoring >units because the modems were plugged into utility power instead of >a UPS. > >Most network providers are aware of the secret hiding in most of our >POPs. Those little sporters and courier modems stuffed into a rack >somewhere plugged into the nearest available outlet, as the only >out-of-band access. Has anyone come up with a solution for powering >these forgotten pieces of equipment, which doesn't cost more than >the modem itself? > >At first you might think it makes sense to power them off the UPS >which is powering the rest of your equipment. The only problem is >if you are using the maintenance modem to monitor your UPS. This >is just one of those things which has bugged me for a few years, but >I still haven't come up with a solution I really like. >-- >Sean Donelan, Data Research Associates, Inc, St. Louis, MO > Affiliation given for identification not representation > --------------------------------------------------------------------------- Joseph Lapolito 300 Federal Street Sr. Network Engineer Andover, MA 01810 NaviNet 508-552-3379 off. [email protected] 508-552-3500 fax ----------------------------------------------------------------------------
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