Q. Will the Cisco Aironet 1250 Series support the Cisco Unified Wireless IP Phone 7921?
A. Yes. The Cisco Unified Wireless IP Phone 7921 is Wi-Fi-compliant and will interoperate with any Wi-Fi-compliant access point, including the Cisco Aironet 1250 Series. The 802.11n standard ensures backwards compatibility for 802.11a/b/g devices.
Thanks Rob for this very concise answer (and 4 for you!).
- To add to it, the difficulty for an 802.11n phone is to stick enough antennae in the (small) body of the phone, knowing that the antennae are supposed to be a certain distance apart from each other, which is a bit incompatible with the idea of keeping the phone small... but I am sure that engineers at Cisco and elsewhere will solve this difficult equation someday. There already are some "802.11n" phones on the market, but I am not too sure on how "802.11n" their performances are, or if they are just compatible, like the 7921 is.
- When in a mixed environment, 802.11n devices with non 802.11n devices, the performances of the 802.11n devices will degrade, in the sense that they would not be as high as if no non 802.11n would be in the cell. They will still be higher than pure 802.11a, to take this spectrum as an example. So if you get 150 Mbps throughput, you may degrade down to 72 Mbps when a non 802.11n is around (don't take these number as absolute references, they are just example). Note that your non 802.11n devices will also benefit from the fact that the 1252 AP is 802.11n, not as far as speed is concerned, but as far as link quality vs distance, basically getting a better link at a farther distance...
So over the air, depends on the enabled data rates. Think of 802.11b as the tortoise and 802.11a/g as the hare. The tortoise has to get out of the way before the hare can show its speed. So basically wouldn't advise to enable all data rates, but only the rates, where you would the system to perform at a miminum (i.e. 12 mbps).
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...
I have created a Powershell script to automatically add a Wireless Guest
User on Cisco WLCs. (tested on 2500 Series) The script should be
completely self explanatory. Prerequisites: Powershell SNMP Module
(Install-Module -Name SNMP) SNMP Write Access to y...