I work for a call center and I work with a 7942 Cisco IP Phone. I’m always impressed by the quality of the phone. The feature that I love a lot would be the speaker phone. I thought it would be a perfect addition to my room and so I searched for it online and see where I can get a good deal. I was lucky enough to get multiple phones for a cheap price on Craigslist. At that time, my dad was telling me that you can convert SCCP to SIP only if you are a Cisco Certified so I had to do some digging online. I found a lot of tutorials on how to do it and sites where you can download firmwares and upgrade it via TFTP.
I have read a lot of tutorials and all of them seemed to vary. I followed one after another until I got the hang of it. (trial and error, I know it is not good especially when messing with firmwares. I do it a lot..)
Things that you need for this:
- TFTP Server – I used my laptop with Windows 7 and used the program TFTPD32. I have not tried setting up a tftp server in my Ubuntu.
- 7940/7960 Cisco IP Phone – I have only tried this with these models. If you do try it on any other models, let me know what happens but I do not recommend it if you do not want to brick anything.
- Router or switch
- Firmware – I got my firmwares from this FTP site or I found this one from Jtech.
First thing you want to do is figuring out what firmware your Cisco phone is running. There are several ways to do this. Check out my tutorial on how to check your firmware here.How to check firmware for Cisco IP Phone 7940/7960
In this tutorial, you would want to see “0” as the third character on your Application Load ID. It means you are running SCCP firmware.
Now that you know what version you have, time to figure out how to proceed on upgrading. The upgrading process will actually depend on the firmware you are running. With the older firmwares, it requires you to upgrade to a certain version before you can go up on a higher version. Basically, you can’t just skip to the latest firmware. You can take a look at the matrix here:
or there’s this guide which is very helpful. It can save you a lot of time reading through the Cisco’s Upgrade Matrix.
One phone that I bought had an SCCP version 5. Here’s the upgrade matrix that I had to do.
From SCCP version 5 -> SIP version 6.3 -> SCCP 7.0 -> SIP 8.11 -> SIP 8.12
* I don’t know if you can upgrade from SCCP 7.0 directly to SIP 8.12. I just read it on one forum and just followed it.
Files that you would need:
Download the firmware. Link is above. Once you have extracted the firmware zip file, it should contain the following:
*** I will use P0S3-8-12-00 as an example for the files needed. ***
- OS79XX.TXT – This is the first file your IP phone will look for and this is where you will specify the version you are upgrading to. So if I was to upgrade to SIP version 8.12, I would edit this file and input
Since this tutorial is mainly for converting SCCP to SIP, you have to remember, the third character is supposed to be the letter ‘S‘ which stands for SIP.
Along with these files, you would need to add two more files. I just used Notepad to add these files.
- SIPDefault.cnf – in this file you would input
- SIP<mac_address>.cnf – This file is for the configuration of the phone. Rename this file and put your MAC Address for your SIP phone. You can locate the MAC address on the back of the phone at the very bottom. You will edit the file and input
# SIP Configuration Generic File# Line 1 appearance line1_name: 1234567 # Line 1 Registration Authentication line1_authname: "UNPROVISIONED" # Line 1 Registration Password line1_password: "UNPROVISIONED" # Line 2 appearance line2_name: 12345678 # Line 2 Registration Authentication line2_authname: "UNPROVISIONED" # Line 2 Registration Password line2_password: "UNPROVISIONED" ####### New Parameters added in Release 2.0 ####### # All user_parameters have been removed # Phone Label (Text desired to be displayed in upper right corner) phone_label: "" ; Has no effect on SIP messaging # Line 1 Display Name (Display name to use for SIP messaging) line1_displayname: "User ID" # Line 2 Display Name (Display name to use for SIP messaging) line2_displayname: "" ####### New Parameters added in Release 3.0 ###### # Phone Prompt (The prompt that will be displayed on console and telnet) phone_prompt: "SIP Phone" ; Limited to 15 characters (Default - SIP Phone) # Phone Password (Password to be used for console or telnet login) phone_password: "cisco" ; Limited to 31 characters (Default - cisco) # User classifcation used when Registering [ none(default), phone, ip ] user_info: none
In order for the phone to get all those configuration, the phone and the TFTP server needs to be in the same network. That is why it requires a switch or router.
Setting up TFTP
At this point, we are ready to set up our TFTP server. As I specified above, I used TFTPD32. Install it. I made sure I ran it as an administrator on my Windows 7.
You will see Current Directory. Point it to where you unzip the firmware files.
For the Server Interface, this is usually the IP address of your computer where your TFTP server is installed.
Now you will go to Settings.
Under Global, you will only need to tick TFTP Server, Syslog Server and DHCP Server (Optional, if you need to use DHCP.)
Under TFTP, change the TFTP Security to ‘None‘. Also, you can change the Base Directory in here.
Under DHCP, these are my settings. You might only need to set this if you are using a switch. I used a switch but it was connected to a router so I still had DHCP Server. I had to use it when I encountered an error “Application Protocol Invalid” I will make a tutorial on how to fix that in the future.
Once you have setup your TFTP Server, we are ready to move on to our Cisco IP Phone.
Upgrading the Cisco Phone
**PLEASE DO NOT UNPLUG THE PHONE AT ANY COST WHILE UPGRADING. IT WILL BRICK YOUR PHONE.**
Before we change or do anything on the phone, we would want to clear out the previous configuration.
If you haven’t done it before, you can see how I cleared out the configuration in this tutorial.
After we cleared out the settings, we will configure the phone to pull files from our TFTP Server.
We must first unlock the settings so we can make changes.
*These options may vary on which model and version you have.
Press Settings and Option #9 Unlock Config. It will ask you for your password. The default would be ‘cisco’.
Then go to Option# 3 Network Configuration -> Option 32 Alternate TFTP and change this to ‘YES‘
Then go to Option #7: TFTP Server and change this to the IP Address of your TFTP Server and press ‘Validate‘ and ‘Save’
Usually after you press ‘Save‘ it will reset the phone, if it does not in one minute, go ahead and reset it by unplugging it from the power source.
The phone will now start communicating with our TFTP Server and get the firmware. You will see that status on the phone. It will verify the load and start uploading it on the phone. While it is uploading, if you look at your TFTP Server and go to Log viewer tab, you will see the events occurring and what file the phone is trying to get.
Once done and rebooted, you will now see an “SIP” logo on the upper right corner of the screen. This confirms that you are successful on converting your Cisco IP Phone. Congratulations!!
If you have any questions or comments, feel free to write below. If you like my contents, don’t forget to subscribe!