Cisco Wireless :: 7921 Wi-Fi Phone Calls Have No Audio With UC540 And AP541n

Mar 24, 2010

We 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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Cisco Wireless :: MSE Not Showing 7921 Phone On WCS Map

Sep 27, 2011

We just installed MSE with CAS ( 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.

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Cisco Wireless :: Getting High Utilization From A 7921 Ip Phone?

Apr 17, 2013

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

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Cisco Wireless :: 7921 Phone Doesn't Have Hold Option

Dec 11, 2011

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).

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Cisco :: H-REAP APs And Fast Roaming For 7921 Phone?

Dec 21, 2011

We have some remote H-READ APs at a branch office and a 7921 phone which drops calls/loses audio when roaming between APs.We are just using WPA2 without any 802.1x or CCKM/PKC.
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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Cisco Wireless :: AP541N Is Registering Phone With A UC500 System

Feb 14, 2011

I know the AP541N can support the 7921 phone but all the documentation I've read assumes the AP541N is registering the phone with a UC500 system. I was curious if there would be any problems using this AP with a 7921 at a remote site (881SRST gateway used). It would be tieing into a CUCM BE system at the central office.

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Belkin Connection Lost During Phone Calls

Jan 30, 2013

About 2 years ago I bought my first laptop and the person I was with recommended my purchasing of a Belkin router. I bought the router, it worked great until this past summer when suddenly whenever somebody called my house phone, my connection was dropped. I was angry cause naturally I have those family members that want to call and talk on the phone with my mother for hours. Eventually I figured out I could work about the problem by hooking the Ethernet cord on my Westel directly to my laptop. Its a temporary fix though in my opinion because this requires me having to sit on the floor against my bed room door and this isn't comfortable, not to mention its also confining, I miss walking around the house with my laptop. Anyway this past weekend I decided to try buying a new Belking N300. This however didn't solve the problem, I still got my signal dropped whenever somebody called the house.

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Cisco WAN :: 3825 Convert Phone Calls From PSTN To SIP

Jan 5, 2011

We have a Cisco Router 3825 which we use to convert phone calls from PSTN to SIP.Can any one suggest us (or point to a documentation) as to how can we use this router as a load balancer (to balance load among different SIP terminals) ?

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Cisco WAN :: 3750-x Output Drop / Remote IP Phone Calls Keep Going Off

Dec 4, 2012

We have a 100Mbps metro-ethernet link connecting to a remote site. This link is terminating in our 3750-x stack switch.We are getting a LOT of output drop on that interface and our remote IP Phone calls keep going off because of that.I've disabled all kind of QoS, but no luck.

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Cisco Routers :: RVS4000 QoS Configuration / Phone At Remote Site Drops Calls

Aug 22, 2011

We have an RVS4000 router at two ends of a VPN tunnel. The VPN tunnel is  working fine, however a phone at the remote site drops calls, even  though they sound clear and unblemished. I have set highest priority on  the port the phone is hooked up to at the remote site, and have set a  priority for upload traffic on both routers, but the phone stills drops  calls after 2 to 3 minutes.

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Cisco Wireless :: 7921 Will Not Pick Up IP Address

Mar 26, 2012

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.

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Cisco Wireless :: How Radio Works On 7921

Feb 20, 2012

 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.

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Cisco Wireless :: UC540 Roaming Does Not Seem To Work

Mar 1, 2012

I currently have a UC540 system with 12x aironet 1130 APs.  Seamless roaming does not seem to work, and the recommendation seems to be to introduce a WLAN controller. 

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Cisco Wireless :: 7921 Phones Disconnect Ten Time An Hour

Jun 27, 2011

One 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.

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Cisco :: 7921 Certificate Verification Failed

Mar 31, 2009

I am trying to install a digi cert on a 7921 and I get the message on import of "certificate verification failed".as there does not seem to be much documentation with the above error message.

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Cisco Wireless :: Getting WAP4410N To Stream Audio And Video?

Sep 21, 2010

I have the WAP4410n connected to a SLM2008. I tried to change to 100Mb the port in the switch but then I lost the connectivity.
But it's a giga port and it must work as a giga port. The new firmware must resolve the problem, and not to be a work around. Or what will be the next, not to use N, only G, or only 20MHz or...
I need the WAP4410n for streaming audio and video?

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Connecting Wireless Projector And Old Audio Mixer

Feb 13, 2013

I am trying to hook up a wireless projector and connect an old audio mixer to my Laptop wireless and in sync so that I can operate the projector video and audio from my laptop anywhere in the room. I have a 30' by 60' sanctuary in my church an old audio mixer hooked up to key board, mics and speakers and one cordless mic. I am considering purchasing a Epson Powerlite 96W Projector and the optional wireless LAN module but wondered if there was a way to hook up a Epson EX7210 projector wireless as it does not accept the optional wireless LAN module. Also we currently have a great singer and no musicians so I am trying to find church presentation software that would include lyrics, background effects and music to accompany our singer.

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Cisco VPN :: Server Configure At UC540 Device

Mar 20, 2011

I am facing problem while connecting my VPN server configure at UC540 device. this device is behind my ISP router. i applied port forwording of IPSEC traffice to my cisco device  which configured as vpn server. now if i try to connect with my Live IP i get the following error. [code] I test if i connect using internally it works but if i try to connect using my Live IP it trying and trying but not connect..

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Cisco Switches :: How To Config SLM224P With UC540

Dec 12, 2012

i need supports for how can config SLM224P with UC540.

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Cisco VPN :: Setup VPN Between UC540 And SR520 With Remote IP?

Apr 30, 2010

setting up a link between a Head Office UC540 and a remote SR520 which I want to use a PC and an IP Phone from. This remote site is the first of several.I've found several examples of site to site IPsec VPNs, but none with references to voice and data VLANs, do I need to worry about this or will the phone just work.

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Cisco Routers :: UC540 - Second Public IP Not Accessible From Inside LAN

Apr 2, 2013

I have a client that just got a second public IP (x.x.x.252) for a new program. I've setup that second IP on their UC540 on the public-facing port and it's accessible all day long from the outside, no problem. The problem comes in where users from within the LAN can't see the new public IP at all; however, they CAN get to the original public IP x.x.x.250. I've looked at the rules every which way and can't see anything that either 1) only allows LAN traffic to get to the original public IP, or 2) a NAT rule that only allows the same thing.
[Disclaimer: I just inherited this client and their setup, so other than me adding the IP and opening ports to it, I didn't program it.]
Here is the port configuration:
interface FastEthernet0/0
  description $FW_OUTSIDE$
  ip address secondary
  ip address
  ip access-group 106 in
  no ip redirects
  no ip (code )
I can't figure out why .250 is internally-accessible, but .252 isn't. .252 is in the routing table as a directly-connected address, but I also added ip route FastEthernet0/0 to the routing table and it still won't go. Everything is controlled by the UC540: The internal servers do not run DNS or DHCP or even a domain. There are no NAT outside rules.

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Cisco Routers :: How To Make Vpn Tunnel Between SA520 And Central UC540

Aug 20, 2011

How could i make a vpn tunnel between a router SA520 and a central UC540.

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Cisco VPN :: UC540 Drop Flow Is Denied By Configured Rule

Jan 29, 2013

I have created a VPN tunnel between a UC540 and ASA running software version 9.1, I am unable to ping from the outside from a network / 24 coming in on the outside interface to the inside network /24. I have tried various commands and some of them may not be necessary. [code]

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Linksys Wireless Router :: WRT120N Gives Audio Alarm (beep) About Every 10 Seconds

Aug 27, 2011

Since a few days my WRT120N gives an audio alarm (beep) about every 10 secs. Cannot find how to overcome this or find the root cause. Installed new s/w version. H/W reset. Nothing works.

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Linksys Wireless Router :: E2500 Dropping Skype Calls

Apr 6, 2012

I just bought an e2500 to replace my WRT54g, hoping that it would fix my call dropping problem. I had tried installing some friend recommended third party firmware on the WRT54g that he said would fix my problem, and with my infinite technological wisdom and experience ended up bricking it.

My problem is that randomly during skype calls with my family back home, I will lose internet connection. It drops the skype call and then I cannot open a web page or anything for about 60 seconds. My internets dead, then it just starts working normally again by itself. I can have anywhere from 60 seconds of connectivity up to 20 minutes or more while skyping. This all happens over a wired connection. Changing the router didn't change a thing, the problem still happens in exactly the same way. I have good bandwidth and all that stuff.Also, I watch netflix on my Xbox 360 over a wireless connection. Sometimes it will just lose connection in the middle of a show. However, the difference is that I can reconnect almost instantly after an interruption on that device. I have fixed the settings on the two different channels according to one of the other post I found in this community, and have not tried those settings out yet. This doesn't worry me as much as the wired connection issues.

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Linksys Wireless Router :: Can No Longer Make Wifi Calls With E1200

Feb 23, 2013

For some reason I can no longer make Wi-Fi calls with my E1200 router. I have checked with my ISP and T-mobil. They both tell me that everything on their respective ends is working correctly. The only piece of the equation is the router.

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Cisco Wireless :: New AP541n With No SSIDs?

Feb 28, 2012

I just installed a brand new AP541N-A-K9 (running AP541N-K9-2.0(1) software) and cannot seem to add a SSID.  I've tried both from CCA and directly from the Web interface (Wireless:Wireless Network Setup menu).  The Add Another button doesn't seem to do anything.  I've even tried multiple browser versions.

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Cisco Wireless :: AP541N How To Configure APs

Jun 19, 2011

I have 3 AP541N. I become this not in a cluster. The APs standalone in the room. The first AP connect with cable to a DHCP Router from a other manufacturer. The other both APs should be connect over WLAN.How I must configure the APs? Which parameters must install?

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Cisco Wireless :: AP541N - No Access Or IP Address

Feb 12, 2013

I have 2 AP541N access points. Have been working well for a couple of years. Later last year they just dissapeard from CCA one day. COundt access them but they were still delivering 'wireless' so to speak I have recently put them back to defaults to try and get them back in to CCA. i had one, but not the other. They would work fine via GUI/web access.Then i updated them to 2.0.4 (both images) and since doing that i have no access to either of them via any form.

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Cisco Wireless :: Misconfiguration Of Management ACL On AP541N-A-K9

Nov 20, 2012

I mistakenly mis-configured "Management ACL mode" on my AP541N.
Administration>Administration Access Control>Managment ACL Mode
I set this to "Enabled", the problem is I only entered 1 IP address, and that IP address is the SAME IP as the AP's own internal interface.  I was not thinking and entered that IP out of habit when I meant to enter my workstation's IP.  The FW does not have a safeguard against this.
So, as you can see, this is a big problem, because now I have completely cut off all access (That I can think of) to the router.  I can never access the AP as that IP because if I set my workstation to that IP, 1) There will be an address conflict, 2) My computer won't route traffic to the AP out its NIC because it recognizes that IP as itself.

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Cisco Wireless :: AP541N Drops All Clients?

Jun 20, 2010

As I posted about in the other AP541N thread about degraded performance, mine did a strange client disconnect last week. It dropped all authenticated clients, but they all thought they were still connected. A quick disable/enable of the wireless card on the laptop would get the computer back on the AP.
This same thing happened again today.
Device information and configuration:
Device: AP541N
H/W: V01


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Cisco Wireless :: AP541N Connectivity And Web Management

Apr 18, 2013

we have two AP541n APs that were clustered togehter.  They are powered using PoE.  The other day I discovered one of them wasn't working properly.  I couldn't log into it from the web interface so I unplugged it and plugged it back in from the PoE switch.  That didn't work.  Since then I have taken it off the network and have tried to reset it and I still can't access it.  I've tried connecting to it from the default IP, which according to the admin guide is, and that doesn't work.  I have tried using Telnet and SSH to connect to it using the default IP and the static IP we had set for it.  I have set up a little linksys router and plugged the AP and a laptop into it in hopes it might get DHCP, but that hasn't worked either.  I have also noticed the WLAN 2.4G and WLAN 5G lights are not coming on.  The PWR, SPEED, and LAN lights all come on.  The DIAG light comes on when it's furst plugged in and then turns off.  Right now it is not plugged into PoE so that light is off too.  We had both APs plugged into an ESW-520 that was plugged into a UC560 which had recently been updated to the latest firmware: 8.6.1. The short story is I don't have any connectivity to my AP541n, even after being reset. No wireless, no Web GUI, no ping, nothing.  Has this thing become a large paperweight?

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Cisco Wireless :: AP541N Bridge With WPA2

Aug 23, 2010

I purchased quite a few of these APs as they listed the ability to function in WPA2-PSK mode, but on initial configuration I see that this may only apply to standard AP mode?  Is there any way to configure WPA2-PSK on an AP541 to AP541 bridge?  Unfortunately, this is a must have for our client.  If not, what would allow for this with an external antenna port?

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