Hi Guys, This one may be slightly off topic, but we are planning to do an asterisk installation that uses POE to supply phones with power. Not being overly familiar with the POE standard, I'm not sure if this will cause regular network cards etc that may be plugged into a POE switch to end up being fried. A quick squizz around seems to tell me that the IEEE standard 802.3af incorporates some form of "auto sensing" Algorithm that allows the switch to detect if it should supply power to a particular device. Can someone confirm for me if I can have VOIP phones using POE and regular network cards plugged into the same switch ? Any help would be appreciated. Cheers, Callum
Damian Funnell
2005-Apr-18 22:32 UTC
[Asterisk-Users] TDM400P and SCSI/SATA = * noise problems???
Hi everyone, For anyone who was following the earlier thread about noise problems on *, here's a little gem from Digium support. In a nutshell Digium told us that they thought that low accuracy results from zttest were the cause of noise problems that we have been experiencing. We re-configured the box to give the TDM400P its own IRQ, but found that the zttest results were still lower than what Digium recommended they should be. When I asked them for further information on how to improve this they replied: ** Extract begins ** SCSI RAID can cause the problem. If disabling hyper threading does not resolve your problem my next suggest would be to revert to a PATA IDE hard drive solution configured to UDMA level 2 using hdparm. SCSI or SATA causes problems on some systems from what I have seen. The problem increases when using a SCSI or SATA RAID. ** Extract ends ** I really hope that they are wrong, as I don't feel like throwing away my nice expensive Ultra320 SCSI RAID controller and hot plug drives and replacing them with some crusty old IDE config. Needless to say I'm not going to go and shell out on IDE controller & drives until I'm a little more certain that this is actually a problem and have asked them for more information. Does anyone else find it odd that the TDM could possibly have a problem sharing a box (but not an IRQ) with a SCSI controller? Combined with the fact that they have also recommended that we turn off hyper threading (also causes problems with TDM, apparently), I'm wondering if these cards shouldn't come with a warning not to use anything with half decent performance in your * server!
>From our experience (with a HP 2626-PWR) it hasn't been an issue.PaulH -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Callum McGillivray Sent: Tuesday, 19 April 2005 3:18 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Asterisk & POE Hi Guys, This one may be slightly off topic, but we are planning to do an asterisk installation that uses POE to supply phones with power. Not being overly familiar with the POE standard, I'm not sure if this will cause regular network cards etc that may be plugged into a POE switch to end up being fried. A quick squizz around seems to tell me that the IEEE standard 802.3af incorporates some form of "auto sensing" Algorithm that allows the switch to detect if it should supply power to a particular device. Can someone confirm for me if I can have VOIP phones using POE and regular network cards plugged into the same switch ? Any help would be appreciated. Cheers, Callum _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you.
Snom 200's & Polycom 600's. Polycom 500's with the special lead. Later, PaulH -----Original Message----- From: Kristof Hardy [mailto:kristof.hardy@catsanddogs.com] Sent: Tuesday, 19 April 2005 5:05 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: paulh@adairs.com.au Subject: Re: [Asterisk-Users] Asterisk & POE Paul Hales wrote:>>From our experience (with a HP 2626-PWR) it hasn't been an issue. > PaulHPaul, Would you like to share wich phones you're using on this switch? Cheers, Kristof. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you.
If you are moving from a PBX to * and you are buying POE just to power IP phones, you should at least check out another option called a Handset Gateway. It converts your existing PBX phones and existing wiring into SIP so the PBX phones look and work just like SIP phones running on *. The old PBX goes away and * becomes your IP-PBX, but you don't have to go buy new IP phones and install all the POE gear to power them. Just go Google for "Handset Gateway" and you'll find some suppliers. -----Original Message----- From: Paul Hales [mailto:paulh@adairs.com.au] Sent: Tuesday, April 19, 2005 12:32 AM To: 'Kristof Hardy'; 'Asterisk Users Mailing List - Non-Commercial Discussion' Cc: 'Jennifer Hales' Subject: RE: [Asterisk-Users] Asterisk & POE Snom 200's & Polycom 600's. Polycom 500's with the special lead. Later, PaulH -----Original Message----- From: Kristof Hardy [mailto:kristof.hardy@catsanddogs.com] Sent: Tuesday, 19 April 2005 5:05 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: paulh@adairs.com.au Subject: Re: [Asterisk-Users] Asterisk & POE Paul Hales wrote:>>From our experience (with a HP 2626-PWR) it hasn't been an issue. > PaulHPaul, Would you like to share wich phones you're using on this switch? Cheers, Kristof. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you.
Ben Hencke
2005-Apr-19 10:39 UTC
[Asterisk-Users] TDM400P and SCSI/SATA = * noise problems???
SATA works ok for me, but its not like I am running a DB server on that box, just a TTS engine and some audio files. It would be nice though. I had some trouble getting my TE405P cards to talk, and got some helpful advise from the folks at Digium excerpt: "You may need to disable unnecessary hardware on your machine such as sound controllers, USB controllers, extra ethernet controllers, firewire, parallel ports, and/or serial ports. " and "If you are running an IDE hard drive please verify that you are using DMA mode with a UDMA setting of no lower than 2 or higher than 3. UDMA mode 2 is ATA33" - "We would suggest using an IDE harddrive rather than SCSI or SATA in order to configure your hard drive to UDMA2. Configuring a SCSI or SATA hard drive to UDMA2 is not possible. " Well there goes disk performance :-P and "Please ensure that you are not running X-Windows, frame-buffer, or serial console, as these will cause problems with our hardware." oh, and "If you are still having IRQ misses with our hardware you could try booting your kernel with "acpi=off" and/or "noapic" to disable ACPI power management andAPIC. These has been known to cause interrupt sharing problems as well." The good news is that it will probably work if you do all that stuff ;-) - Ben -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050419/55daefa2/attachment.htm
Hmmmm...I thought it was done via a resistance signature...but I could be wrong.... Some of the better (maybe read newer) mid-spans won't toast things. (Redhawk, for example) Later, PaulH -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of SCollins Sent: Tuesday, 19 April 2005 9:40 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Asterisk & POE What PoE Switch are you thinking of using or own? The 802.3af Spec, as I understand it, uses a special Fast Link Pulse to detect if the Powered Device needs to receive power. However, there are vendors that have pre-spec (before 2003) Switches that MAY NOT follow the spec. There are also (2) differant types of PoE Sourcing Switches. End-Span and Mid-Span Mid-Span sits between the IP phone that needs powers and the Data Switch that connects to the network. The Mid-Span ONLY supplies power to the IP Phone and thus requires the addition of an Ethernet Sitch or Hub to provide the connectivity to the network. End-Span devices incorporate the Power Sourcing capabilities of the mid-Span and the Ethernet connectivity of a Switch. Now it gets tricky. As I understand the spec, and from my own experience, a PoE Switch can source power over pins 1,2,3, and 6 as well as Ethernet connectivity OR it can source PoE over the unused pins 4,5,7 and 8 BUT it does not have to do both. On the other hand, a 802.3af compliant PoE device (IP phone, Wireless AP, Surveilance Camera)must be able to detect the FLPs on either of the (4) pairs and then source according to what the PoE Switch is sending. Yes, a PoE Switch can toast a NIC/PCMCIA card if the PoE Switch is a Mid-Span device or power Injector (I don't believe these device are capable of detecting the capabilities of a Powered Device and thus they just source power down the designated Rx pairs - someone correct me if I'm wrong). I would look at the product Data Sheet for your phone and find out how it handles sourced power and if it's 802.3af IEEE spec compliant. Look at the PoE Swtich options Cisco, 3Com, Netgear, Asante, HP etc. I know from experience that Cisco is a great solution if you have a big budget for a Cat 3550. 3Com is Spec compliant and provides Power over pins 1,2,3 and 6 ONLY. Netgear is the least expensive solution, but with my experience it's hard to get support if you have problems with their product, unless you purchase a Service Contract (warranty support only entitles you to speak to 1st level Tech who can answer basic questions) Hope some of this helped. Sean tOn Tue, 19 Apr 2005 17:32:00 +1000, Paul Hales <paulh@adairs.com.au> wrote:> Snom 200's & Polycom 600's. > > Polycom 500's with the special lead. > > Later, > > PaulH > > -----Original Message----- > From: Kristof Hardy [mailto:kristof.hardy@catsanddogs.com] > Sent: Tuesday, 19 April 2005 5:05 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Cc: paulh@adairs.com.au > Subject: Re: [Asterisk-Users] Asterisk & POE > > Paul Hales wrote: >>> From our experience (with a HP 2626-PWR) it hasn't been an issue. >> PaulH > > Paul, > > Would you like to share wich phones you're using on this switch? > > > Cheers, > Kristof. > CAUTION: This email message and accompanying data may contain > information that is confidential. If you are not the intended > recipient, you are notified that any use, dissemination, distribution > or copying of this message or data is prohibited. If you have received > this email message in error, please notify us immediately and erase > all copies of this message and attachments. Thank you. > CAUTION: This email message and accompanying data may contain > information that is confidential. If you are not the intended > recipient, you are notified that any use, dissemination, distribution > or copying of this message or data is prohibited. If you have received > this email message in error, please notify us immediately and erase > all copies of this message and attachments. Thank you. > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-- http://www.1and1.com/?k_id=8358073 _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you. CAUTION: This email message and accompanying data may contain information that is confidential. If you are not the intended recipient, you are notified that any use, dissemination, distribution or copying of this message or data is prohibited. If you have received this email message in error, please notify us immediately and erase all copies of this message and attachments. Thank you.