I have to implement for a new WLAN setup for maily Wireless Voice & Data, and the provided Cisco WLAN components are as follows:-
1. WLC4404 & 4402, 1nos each --- 4402 is installed now. 2. AIR-LAP1242AG-N-K9 - 120 Nos. with AIR-ANT5959 120 Nos. ---- Testing with a single AP 3. CP-7921G-A-K9 ( Wireless IP Phone ) - 150 Nos. ---- Testing with 2 nos. Wireless IP phone 4. WCS ( 100+50) License ---- Not installed now 5. ACS - CSACS-1120-K9 - 1no. --- Not installed now 6. Call Manager - Version 7.1 - PUB & SUB both are installed and configured now 7. Cisco 7940 ( Wired IP Phone ) - 450 Nos. --- 4 Nos are installed and Wires IP phones are working properly.
I have configure WLC 4404 as below:-
Service Port :- 18.104.22.168/24 Managerment :- 172.16.41.51/24 AP-Manager :- 172.16.41.52/24 Virtual Gateway :- 22.214.171.124
Both Management & AP Manager with DHCP Server - 172.16.100.53/24, a Windows 2008
Cisco LAP 1242 - IP address on 172.16.41.53/24
Voice VLAN ( ALL Wired & Wiressless IP phone ) 172.30.28.0/22
The wires Phones are working properly with all required feature like call divert, perk, conf, fwd etc., but Wireless IP phones are getting erros like Call failed. They are getting IP address, & registering properly with Call manager details, TFTP etc, calls are coming / going to other extn ( Wired & Wireless Both ) but when trying to pickup, Wirelss IP Phone getting error call failed.
I have tested the a Laptop getting the same IP, in which the IP phones are connected, the laptop is working fine with all application.
Please help me and suggest me what could be the problem.
Wired Phones are getting DHCP ip address like 172.16.100.53, but the Wireless Phones are getting DHCP as 126.96.36.199, rest all other configuration is getting perfectly fine compare to Wired phone.
Also, your APS and phone are not for the same regulatory domain, if you configure your WLC like guide says and if the phone is still disconnected, please make a debug client to see what can be happening. WLC by default has 802.11d world mode enabled; it may not be the problem.
technically the AP's and Phones are not the same regulatory domain, but they are both America's although the -N domain is for non-FCC North America.. so I wouldn't think this would be an issue since they are both still americas and it's connecting it's just not getting the bandwidth to make a call.
In the CAC screen shot you sent; the 7920 settings should be disabled and WMM should be enabled.. The CAC I was referring to is under the Wireless Tab at the top, then on the left hand side you'll see a header that says 802.11a/n and one that says 802.11b/g/n if you expand those you will see many more options like Network, RF Grouping, Etc...
Depending on the version of code on the controller there will either be a voice category or a Media Category which will then display a page that has the following on it.
Call Admission Control (CAC)
Admission Control (ACM)
Max RF Bandwidth (5-85)(%)
Reserved Roaming Bandwidth (0-25)(%)
As the other poster indicated this is all in the 7921G Deployment Guide.