20 Most Recent Cisco 7940G IP Phone Questions & Answers


Hi

This happens when you IP phone communicated with the Voice vlan with the IP address of data vlan.

To solve it manually enter the IP address of the TFTP server and option 150 on the DHCP server.
remove the voice vlan from the switch port and reboot the phone
again add the voice vlan and reload the phones

Cisco 7940G IP... | Answered on Aug 13, 2010


Try unplugging the phone from the power or POEthernet cable and waiting a minute and then plugging it back in.

Cisco 7940G IP... | Answered on Oct 27, 2009


connect a crosscable between your cisco 7940 and the laptop
start a dhcpserver and a tftpserver on your laptop
The files i mentioned (SIP license) have to be purchased at Cisco.
start the IPPhone, thats all

Cisco 7940G IP... | Answered on Aug 27, 2008


you need different files to upload by tftp
by example version 8
P0S3-08-2-00.sb2
P0S3-08-2-00.sbn
P0S3-08-2-00.bin
P0S3-08-2-00.loads
OS79XX.TXT (tells the version)
SIPDefault.cnf


Cisco 7940G IP... | Answered on Aug 26, 2008


Try to manually reset the phone - **#"Settings" (this will unlock the configuration) + Network + menu under number "33" - erase the configuration. Then the phone configuration will be erased. Also you can manually set IP address and TFTP server

Cisco 7940G IP... | Answered on Jun 10, 2008


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Cisco Computers... | Answered on Nov 12, 2019


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Cisco Computers... | Answered on Nov 12, 2019

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