Question about Cisco 7960G IP Phone

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Cisco ip phone boot frequently..

My IP phone is connected to 3550 switch.
and boot frequently..
Wat may be the cause.. and solution...

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Reset it

Posted on Jul 02, 2009

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Are you powering the phone via PoE from the switch? If so, it might be pushing PoE that the phone is not completely happy with. You could try purchasing a Cisco Power Cube and powering it locally.

Posted on Dec 05, 2012

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1 Answer

I cant test my 7941g because i keep getting a small bullseye on the bottom left corner of the screen


Your phone is trying to connect to a TFTP server address to download a firmware and/or config file update. You need to figure out what IP address it is trying to connect to (You may have to use wireshark or another packet sniffer to determine this).

Once you know the IP it is trying to connect to, you'll need to set up a small network with a TFTP server running on that same address, and feed the phone a firmware update and/or config file. It will likely not fully boot unless it gets a firmware update.

Cisco Phone 48V Power Supply

Dec 05, 2012 | Cisco 7941G IP Phone

1 Answer

How to recovery from boot loop?


Are you familiar with wireshark or other packet sniffers? You might consider running wireshark on the network to see exactly what the phone is doing when it boots. It might be configured to connect to a TFTP server or something on boot, to look for a firmware or config file update.

Cisco Telephone Power Supply

Nov 14, 2012 | Cisco SPA502G IP Phone

1 Answer

Cisco SPA504G Firmware update issue


You need to make sure that your laptop and IP phone are on the same network subnet. For instance, if you IP phone's IP address is 192.168.2.24 than your laptop must be on the same network addressing scheme, such as 192.168.2.23.

<a href="http://www.ciscopowercube.com">Cisco CP-PWR-CUBE3</a>

Sep 07, 2012 | Cisco SPA504G IP Phone

1 Answer

I have upgraded my 3550 to a 3560v2 48portPOE and can not get my cisco 7940G to power up. The switchport is green but when I look at the power inline log it does not see the phone or that it is a POE...


Are you sure it is a PoE model? The 3650v2 comes in both a PoE and non PoE model.

PoE models: 3560V2-24PS, 3560V2-48PS
non-PoE models: 3560V2-24TS, 3560V2-48TS

Apr 15, 2011 | Cisco 7940 IP Phone

1 Answer

Why can't I connect my corporate Cisco IP Phone 7941 to a switch? I can connect a switch to Cisco phone switch and connect multiple devices. But the phone will only work when connected directly to the wall...


Connecting a hub or switch to the "PC" port on the back of the phone is not a recommended best practice by Cisco as the IP phone does not support spanning tree protocol.

Sep 28, 2010 | Cisco 7940 IP Phone

2 Answers

Hello, my cisco ip phone does not start


Confirm if the Phone has power supply. and If it's connected to a POE switch confirm that it connects to the Switch port on the phone.

Oct 14, 2009 | Cisco Computers & Internet

1 Answer

One way audio on NEC ITL 12 button IP Phone at remote site. Main site has IP Phones which are working fine. IP Phone connected to Cisco 3560 24 port poe switch. Switch connected to 2801 router. Point to...


This is likely a config problem on the NEC or a hardware/software issue on the NEC. Do a Wireshark capture on the NIC on both ends. Examine the RTP streams and see if they are intact. You may have to decode the stream from UDP to RTP depending on if it is a peer to peer call or if it is going through the 8100. Plenty of documentation on how to do that at Wireshark's website.

Aug 01, 2009 | NEC Computers & Internet

1 Answer

Doesn't answer calls or answers with speaker only


This is happening because your "Self-Cleaning" hookswitch is going bad. Since it's a carbon contact design, this will happen more and more frequently. I recommend sending your Cisco IP phones to IdacomUSA for repair and refurbishment. If you are the DIY type of person, we are also selling the pad and assembly for the Cisco hookswitch at $15 each (w/minimum order)

Jun 04, 2009 | Cisco 7940 IP Phone

1 Answer

7906G Home VOIP installation Problem


Then you need power adapter for Cisco 7960 IP phone ( -40V DC).
Cisco phones work best with Cisco, and sometimes ONLY Cisco switches.

One question which voice gateway you will use for your 7960 VoIP phone calls to go through ?
(AT&T probably supports only their IP Phones with special and usually hidden settings from end user)

Jan 17, 2009 | Cisco 7906G IP Phone

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