I just recieved new 7921 phones. I cannot get them to pick up a dhcp address
I keep getting DHCP "Timeout's" and " Configuring IP" . The ould 7921's and the new 7925's work just fine. I have tried removing and reconfiguring the WLAN and Interface on the Controllers. I even removed and reconfigured the DHCP scope in Infoblox.
We just installed MSE with CAS (7.0.201.204 software) and everything works fine and clients are shown on WCS floor maps except for Cisco 7921 wireless phones which dont appear in the WCS map.
View 3 Replies View Related We have two different entities we support and both are set up as autonomouse wireless groups. The SSID is the same though so they can use their 7921's between floors and buildings. The problem we have had is that the phones on the first floor were getting the IP's of the organization on the second floor. When you view the AP's on the phone the ap directly next to it on the first floor (the one its suppose to talk to) is listed first, The strange thing is that shows it is connected to the right AP (the first floor one). The AP on the second floor is also listed but its about third down. After the phone sits it will actually change IP's but not all of them. Their were a few phones that took about a half a day to get the correct IP.
My question is how do these phones grab their ip's? I know how DHCP works but I am needing to know specifically how the radio works on the 7921's. What is the boot up process? It appears that it must cycle through each channel starting with the highest and loop through a process in descending order: compare ssid's and then authenticate if possible. I am assuming it is seeing the second floor first because initially they all get the second floor ip. The second floor is on channel 60 and the one it should connect to is on channel 36 (We are using 802.11a). That's how I came up with my descending channel theory.
I'm getting high utilizatiom from a 7921 ip phone and call quality is getting very low sometimes. What can cause this high utilization?802.11 Mode 802.11a Scan Mode Auto Restricted Data Rates False Call Power Save Mode U-APSD/PS-POLL BSSID xxxAccess Point xxxTx Power 15 dBm Channel 44 RSSI -57 Channel Utilization 153 DTIM period (ms) 2 Security Mode Shared+WEP Encryption WEP Key Management Shared
Load Information
Load Profile................................. PASSED
Receive Utilization.......................... 0 %
Transmit Utilization......................... 0 %
Channel Utilization.......................... 69 %
Attached Clients............................. 4 clients
I have configured a cisco UC520 with inbound called coming in on FXO port 0 and have configured it as a co-line. I have 4 phones set up on the system including the wireless 7921 phone, the problem is that if i answer the call on the 7921 it does not give me the option to hold or transfer the call however the other phones do (7931).
View 1 Replies View RelatedOne of my 7921 phones disconnect ten time an hour and during conversations. Sometimes, people who call on this phone are redirected to the answer message.This phone is connected through WIFI network and Cisco Callmanager 4.2 manage all phones (we have about 80 phones on the network). I thought it was a problem with the phone but I exchange with another one and it's exactely the same problem. The problem is just for a line in particular. All the 7921g phones in my company are configured from mac address in the call manager. This problem occured after a storm but I'm not really sure that it's related to.
View 2 Replies View RelatedWe have a new deployment where we have 5 total 7921G wifi phones connected via 2 AP541n access points, one connected to a ESW520p switch and then to the UC540 and the other connected directly to the UC540. The wifi phones are intermittently giving no audio when calling each other, however, calls to the PSTN consistently do have 2 way audio. Is this a security issue perhaps? We are running the latest CCA software pack as this is a brand new deployment, also the AP's were upgraded to the latest firmware.
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Do we absolutely have to set up a radius server/8021.x/EAP to enable fast roaming?We had 2 AP's autonomous with WPA2 before and roaming didn't seem to be an issue. We now have 4 APs over WLC in the same office and the phone calls are very unstable.
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voice-port 0/0/0
supervisory disconnect dualtone mid-call
secondary dialtone
timeouts call-disconnect 2
timeouts ringing 30
timeouts wait-release 2
timing hookflash-out 500
caller-id enable
dial-peer voice 201 pots destination-pattern 9T port 0/0/0 and I can see it pick up.
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