search for: midspan

...end of a Polycom power adapter. Presumably these cables can replace the default external AC injection cable completely. The module, for those who are interested, provides ground-loop detection and protection. Early revisions of the 802.3af standard did not provide for ground-loop protection in the midspan, and so phones would overload (and fry) PoE midspans (this is strong evidence that there were no telecom engineers in the 802.3af working group, since ground-loop protection has been a necessary part of PSTN systems since the dawn of time). I suspect newer midspan equipment is not burdened with th...

Hi, Do you need a special cable and power for that unit or you can run it of PoE Switch? Thanks. robert

...S module). - Plugged the known good analog sets straight into the server - Moved the FXS module off the REMORA daughtercard to the main card - Replaced the FXS module with a new one - Run the server off of battery power, to see if the noise is garbage leaking in off the AC - Turned off the PoE midspan The next thing I'm going to try is turning off the switch it's plugged into. When that is done, I'll have done everything short of move the server to a different location. I have already contacted Sangoma about this, but we're busy dealing with another problem and they're swam...

Sorry I dont have any answers, however I do have a question. I was told that ISDN-30 lines do not work during power failure. Can anyone with some better knowledge confirm or deny this? Is this because the ISDN-30 box on the wall requires power (and Telco providers just dont hook them into UPS as standard)? Or do they mean if your local circuit has lost power so will the local digital exchange

Based on several threads I've read on this list, I assume that it would be handy to supply POE (power over ethernet) in an environment without having to purchase POE switches (assumed expensive) and abandon one's existing (familiar/custom/not-yet-expensed/etc.) switches/hubs. Assume I have a non-POE switch with 24 RJ-45 (ethernet) ports. I design a 1U box that can be mounted just

Sorry for posting slightly off topic, I use an Avaya 1152a1x midspan device to deliver power some Snom phones. The Power distrubution unit seems to be identical to PowerDsine PD-6024G/AC/M. I can get some basic information via SNTP (networking setup, uptime) but no port monitoring and no monitoring of power output using snmpwalk on the device. Does anyone has ex...

...o:marrandy@chaossolutions.org] Sent: Tuesday, January 20, 2004 9:23 AM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Power Over Ethernet for *any* ethernet switch (or hub); product idea On Tuesday 20 January 2004 10:30 am, Kevin Ragsdale wrote: > > 3Com makes a 24-port midspan box that sells for around $800. > > Kevin > > > This electronic message transmission, including attachments, is for the exclusive use of the individuals to which this e-mail is addressed and is to be reviewed and used exclusively for authorized company purposes. This trans...

Has anyone gotten the Lucent / Orinoco injectors (AE-1, AE-6, AE-12) to work with the Cisco 79* series phones? I'm not sure if the are the statndard POE or not.... -Darren

I am hoping that someone has had better luck with this than I have. I would like to connect Cisco 7940s and 7960s to the Netgear FS116P, and take advantage of its POE. I know that the Cisco phones use Cisco's "pre-standard" POE implementation, but as I understand it the difference is really only two pins. I bought a bunch of PowerDsine inline power adapters which supposedly change

...as able to use PoE. The detection process is passive on the device, since if it has no power it cannot 'signal' that it needs power. The process is repeated several times a second to ensure that a PoE is not unplugged and a non-PoE is plugged into it's place and damaged. Issues with midspans devices: The 24 port models are usually 12 port in reality. 12 in and 12 out. Sure there are 24 ports, but you are only going to power 12 devices. So in a larger environment they quickly get expensive. To make the whole situation more interesting the Cisco phones support not only 802.3af, but...

Hello; We have a cisco switches but they are not PoE and we need only to have PoE device so the cables come for it first to provide the power and then goes to the switch (to be like batch panel), is there something like this that can be used for the IP Phones? Regards Bilal -------------- next part -------------- An HTML attachment was scrubbed... URL:

I'm having problem powering Cisco phone's (7940 and 7905) on Linksys SRW224P switch (with PoE functionality). I have tested three phone's, one is working (7905) and two aren't (7905 and 7940). I have plugged all three phones on same switch port with same cable! Do I need to change anything in phone configuration? Is there something wrong with Linksys switch? How can I troubleshoot

I've been following the list for months, and I have a working Asterisk setup, but it'd be *really* useful to me at this point if someone could summarize when Asterisk has echo problems and when it doesn't. For instance, I usually hear a far-end echo when talking on my 7940, but not when using a POTS phone plugged into a TDM400 FXO port. It doesn't seem to matter if the call

I need to connect up to sixteen phones per building, I can use a cheap hub, but POE would be useful. Is there a cheap POE hub available? Everything I have seen has been expensive. Chris Mason