Few things. 802.3af has nothing to do with CDP. CDP is used with Cisco pre-standard inline power, which is ever-so-slowly being phased out (802.3af is more widely supported, delivers more power, and, well, doesn't rely on the ever so patented CDP).
Also, the power reporting in both pre-standard inline power and 802.3af doesn't save power, it just allows the switch to manage its own power and not be overloaded.
Anyway, I'm having fun. This is one of those topics I actually know things about.
You can configure the 6500 with PoE blades as redundant or non-redundant. In redundant mode, you can only load up to what one power supply can support. This might explain the discrepancy.
To me the more exciting bit is that you can fully populate a 4500 with PoE blades and power every port. I don't know how many people are running 6500s in the access layer, but I'd hope there are more running the 4500s.
Oh, and that can be gigE on every port too. Excitement:).
Video phones are pretty much here in the enterprise. There's still not a lot of use for them, and they don't add value, but adding video capabilities to your (at least Cisco-based) IP phone systems is as simple as putting a webcam on the computer attached to the phone. There are also purpose-built video phones available.
It's as simple as making a normal call. If you're vid-capable, and you call someone else who is, a video window pops up. If you mute the phone, the video mutes as well. Easy.
Ethernet cables have tiny wires in the. Those tiny wires can't deliver enough current to provide power to a switch. The Right Way to do it is to get good, fault-tolerant power to your switch.
If you're paranoid, you can dual-home a good IP phone (*cough*Cisco*cough*) and give it local power so it has redundant data and power. I've never actually seen this done in the wild, but it's a supported configuration on all the Cisco IP phones that have a built in switch (i.e., 7912, 7940, 7960, 7970).
Why would you want this? TDM is 64kbit, which is the same if not better than analog lines. The better VoIP codecs (g.729) get that down around 12kbit without any noticeable reduction in quality.
It's a phone, not a stereo. What could you possibly need more sound quality for?
He probably thought of it as a way to increase efficiency and ultimately reduce our workload.
More realistically, he was a smart person, and realized that humans like and need to work. Or should we all model ourselves after Paris Hilton?
Increased workload? Less human contact? Bullshit. The microchip brought us manufacturing automation and advanced communications, amongst many other things. Faster and more transparent communication has brought us more individual involvement in world events.
The problem is not in the computer, it is in your mind.
I think you'd need one of their I'm-a-radio PCMCIA cards to really tell. I'm betting the processor in my wee A630 isn't really designed to do this quickly, and that a lot of latency is in the first hop. Of course, on the other side, you have to translate from freaky GPRS over-the-air protocol to a traditional data network, which can't be cheap time wise. I actually interviewed for a job with the guys who produce interface cards for Cisco routers to connect to the cell network; they have about 30 people working on it world wide. It was definitely the most complex technical interview I've ever been in:).
Anyway, no one wants to use GPRS with it's wopping 56k transfer speeds all the time, but it's great for times like this, when you're do 70 down an interstate in the middle of Nevada. I couldn't be happier with T-Mobile's internet access plans.
This is via Bluetooth to a Motorola A630, out through T-Mobile via NAT. I'm sure the second (BT) radio hop doesn't help. Things might be a bit better on their "VPN" connectivity that gives you a real IP:
ping www.slashdot.org
Pinging www.slashdot.org [66.35.250.151] with 32 bytes of data:
Reply from 66.35.250.151: bytes=32 time=917ms TTL=50 Reply from 66.35.250.151: bytes=32 time=688ms TTL=50 Reply from 66.35.250.151: bytes=32 time=789ms TTL=50 Reply from 66.35.250.151: bytes=32 time=721ms TTL=50
Ping statistics for 66.35.250.151:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds:
Minimum = 688ms, Maximum = 917ms, Average = 778ms
Point conceded about KVMs. I really like random USB HID devices (like the Griffin Powermate); maybe there's a market here for a few nice looking programmable buttons on a USB cable. I'm an IBM Model M addict, so the modern split keyboards or ones swith lots of shortcut keys are something of an abomination to me.
who needs Print Screen? Scroll lock? Lose one of those, and save yourself from buying ugly crappy kayboards. Need to control the volumen? Get a Griffin Powermate!
Won't this punish the families of artists who die young?
Take the guy who wrote the hit Broadway musical Rent. He died shortly before the first performance. I think someone is still deserving of his residuals.
"For asterisk"? By the same logic, you could say a Cisco 7960, because SIP firmware is available, is "for asterisk". The linksys PAP2 (Vonage-bundled ATA) is a SPA-2000 repackaged. Sipura isn't in the same market as Cisco in this case; Sipura makes cut-rate stuff, Cisco makes large-deployment stuff. It's a good purchase for the linksys group, and I'd be amazed if the ATA products (all 3 of them!) weren't assimilated.
What happens to Sipura's new IP phone is another question entirely, though.
Hmm, I can't find any data on how fast people can/key/ morse, but the record for copying it is 75+ WPM. I also have an A630, and I wouldn't be surprised at all if an experienced operator with a good key could beat me.
Slashdot Mirror
Few things. 802.3af has nothing to do with CDP. CDP is used with Cisco pre-standard inline power, which is ever-so-slowly being phased out (802.3af is more widely supported, delivers more power, and, well, doesn't rely on the ever so patented CDP).
Also, the power reporting in both pre-standard inline power and 802.3af doesn't save power, it just allows the switch to manage its own power and not be overloaded.
Anyway, I'm having fun. This is one of those topics I actually know things about.
--
Phil
You can configure the 6500 with PoE blades as redundant or non-redundant. In redundant mode, you can only load up to what one power supply can support. This might explain the discrepancy.
:).
To me the more exciting bit is that you can fully populate a 4500 with PoE blades and power every port. I don't know how many people are running 6500s in the access layer, but I'd hope there are more running the 4500s.
Oh, and that can be gigE on every port too. Excitement
--
Phil
Video phones are pretty much here in the enterprise. There's still not a lot of use for them, and they don't add value, but adding video capabilities to your (at least Cisco-based) IP phone systems is as simple as putting a webcam on the computer attached to the phone. There are also purpose-built video phones available.
It's as simple as making a normal call. If you're vid-capable, and you call someone else who is, a video window pops up. If you mute the phone, the video mutes as well. Easy.
--
Phil
Most people with an IP phone of any sort are not at home. They're at their office. The home market is a drop in the proverbial bucket.
--
Phil
Umm, why are you rebooting your phones during working hours? That seems like a bad idea.
--
Phil
Ethernet cables have tiny wires in the. Those tiny wires can't deliver enough current to provide power to a switch. The Right Way to do it is to get good, fault-tolerant power to your switch.
If you're paranoid, you can dual-home a good IP phone (*cough*Cisco*cough*) and give it local power so it has redundant data and power. I've never actually seen this done in the wild, but it's a supported configuration on all the Cisco IP phones that have a built in switch (i.e., 7912, 7940, 7960, 7970).
--
Phil
Why would you want this? TDM is 64kbit, which is the same if not better than analog lines. The better VoIP codecs (g.729) get that down around 12kbit without any noticeable reduction in quality.
It's a phone, not a stereo. What could you possibly need more sound quality for?
--
Phil
Why not just put an UPS on the household power supply if you care so much about this?
Because your toaster doesn't need to keep working in a power outage. Your phone does.
Um, duh?
He probably thought of it as a way to increase efficiency and ultimately reduce our workload.
More realistically, he was a smart person, and realized that humans like and need to work. Or should we all model ourselves after Paris Hilton?
Increased workload? Less human contact? Bullshit. The microchip brought us manufacturing automation and advanced communications, amongst many other things. Faster and more transparent communication has brought us more individual involvement in world events.
The problem is not in the computer, it is in your mind.
Clock! Everyone loves clocks!
Anyone know what kind of 1U machines / enclosures those are? They look inexpensive and decent, which is awesome :).
--
lds
I think you'd need one of their I'm-a-radio PCMCIA cards to really tell. I'm betting the processor in my wee A630 isn't really designed to do this quickly, and that a lot of latency is in the first hop. Of course, on the other side, you have to translate from freaky GPRS over-the-air protocol to a traditional data network, which can't be cheap time wise. I actually interviewed for a job with the guys who produce interface cards for Cisco routers to connect to the cell network; they have about 30 people working on it world wide. It was definitely the most complex technical interview I've ever been in :).
Anyway, no one wants to use GPRS with it's wopping 56k transfer speeds all the time, but it's great for times like this, when you're do 70 down an interstate in the middle of Nevada. I couldn't be happier with T-Mobile's internet access plans.
--
lds
Point conceded about KVMs. I really like random USB HID devices (like the Griffin Powermate); maybe there's a market here for a few nice looking programmable buttons on a USB cable. I'm an IBM Model M addict, so the modern split keyboards or ones swith lots of shortcut keys are something of an abomination to me.
--
lds
Volume knob and single button!
After using one for a while, I think it's worth the fifty dollars. Plus, I got to make a lot infantile jokes about my Giant USB Knob!
--
lds
who needs Print Screen? Scroll lock? Lose one of those, and save yourself from buying ugly crappy kayboards. Need to control the volumen? Get a Griffin Powermate!
--
lds
Holy lord, why isn't your IDE doing this? Mine is.
--
Phil
Won't this punish the families of artists who die young?
Take the guy who wrote the hit Broadway musical Rent. He died shortly before the first performance. I think someone is still deserving of his residuals.
--
Phil
Am I the only person out there who really likes the character frequency of ROT13'd english text?
mmmm, the letter V.....
--
lds
Money. Impulse control problems.
The combination thereof.
--
lds
"For asterisk"? By the same logic, you could say a Cisco 7960, because SIP firmware is available, is "for asterisk". The linksys PAP2 (Vonage-bundled ATA) is a SPA-2000 repackaged. Sipura isn't in the same market as Cisco in this case; Sipura makes cut-rate stuff, Cisco makes large-deployment stuff. It's a good purchase for the linksys group, and I'd be amazed if the ATA products (all 3 of them!) weren't assimilated.
What happens to Sipura's new IP phone is another question entirely, though.
--
lds
Hmm, I can't find any data on how fast people can /key/ morse, but the record for copying it is 75+ WPM. I also have an A630, and I wouldn't be surprised at all if an experienced operator with a good key could beat me.
--
lds
Under your proposed system, what prevents me from borrowing money from every bank in town and running out on my debt?
--
Phil
I meant silly as a synonym for "awesome" :).
I'm very excited by having gotten to touch an engineering model of the CRS-1!
--
Phil
You realize that they rewrote the installer for this release, right?
--
lds