Lock extension with my Panasonic KX T7730

It depends what telephone system the KX-T7730 is connected to. You should have a Panasonic box that says 'KX-TA624', 'KX-TEA308, 'KX-TES824' or similar somewhere.
Depending which Telephone System you have, it may just need programming or it may need an additional card (circuit board) installing. Panasonic KX TEA TES Telephone Systems Tiny Telecom

Press PROGRAM ** (then system password default is 1234) Use volume key to shoe extension name in display Use ENTER and ARROW keys and ALPHA NUMERICAL entry to change Press STORE to complete

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If you have an extension locked with electronic station lock, the system owner can unlock it from the attendant console. In fact, if the system owner locked it, you can't do anything about it to unlock it from the extension.

So, because this is a public forum and I have no idea who you are, I suggest you speak with the system owner and look in your OM for attendant functions.


Carl

that is not pssible to set from telephone
there is a PABX device (panasonic kx-tes824 ) fixed in wall
from that PABX check 101 extension number (maybe 10, wich phone connected jack1 )
from there is only you can program



Please let me know this useful

If you are using the KX-T7730 phone on a Panasonic KX-Txx 308 or 824 system.
From the Switchboard / Main telephone ( usually ext 101, 10 or 9 ) with the handset on the cradle/hook :
1. Press PROGRAM * # followed by the system password ( default is 1234).
2. Now press 604 and then SP-PHONE. Enter the jack number you wish to change ( 01 is extension 101, 02 is extension 102 etc. ).
3. Enter the name ( basically the same as texting on a cellphone ). Press AUTO DIAL / STORE to save your change.
4. To go to the next extension press SP-PHONE. Don’t forget to press AUTO DIAL / STORE to save your change after each name entered.
5. Press PROGRAM to exit program mode and you are done.

how to retrieve the password?

If you are using the KX-T7730 phone on a Panasonic KX-Txx 308 or 824 system. From the Switchboard / Main telephone ( usually ext 101, 10 or 9 ) with the handset on the cradle press PROGRAM * # followed by the system password ( default is 1234). Now press 604 and then SP-PHONE. Enter the jack number you wish to change ( 01 is extension 101, 02 is extension 102 etc. ). Enter the name ( basically the same as texting on a cellphone ). Press AUTO DIAL / STORE to save your change. To go to the next extension press SP-PHONE. Don’t forget to press AUTO DIAL / STORE to save your change after each name entered. Press PROGRAM to exit program mode and you are done.
PLEASE rate / vote this answer if it was helpful.
Thank you.

I assume that you want to program the extension names.

If you are using the KX-T7730 phone on a Panasonic KX-Txx 308 or 824 system. From the Switchboard / Main telephone ( usually ext 101, 10 or 9 ) with the handset on the hook/cradle press PROGRAM * # followed by the system password ( default is 1234). Now press 604 and then SP-PHONE. Enter the jack number you wish to change ( 01 is extension 101, 02 is extension 102 etc. ). Enter the name ( basically the same as texting on a cellphone ). Press AUTO DIAL / STORE to save your change. To go to the next extension press SP-PHONE. Don’t forget to press AUTO DIAL / STORE to save your change after each name entered. Press PROGRAM to exit program mode and you are done.
PLEASE rate / vote this answer if it was helpful.
Thank you.

If you lost the password the only way to get into programming mode is to reset the telephone system to factory default. If you are not accustomed to all programming features this is not recomended because resetting will whipe out all programming including ringer settings, extension names, speeddials, routing and class of service. If you still want to reset let me know.

If you are using the KX-T7730 phone on a Panasonic KX-Txx 308 or 824 system. From the Switchboard / Main telephone ( usually ext 101, 10 or 9 ) with the handset on the cradle press PROGRAM * # followed by the system password ( default is 1234). Now press 604 and then SP-PHONE. Enter the jack number you wish to change ( 01 is extension 101, 02 is extension 102 etc. ). Enter the name ( basically the same as texting on a cellphone ). Press AUTO DIAL / STORE to save your change. To go to the next extension press SP-PHONE. Don’t forget to press AUTO DIAL / STORE to save your change after each name entered. Press PROGRAM to exit program mode and you are done.
PLEASE rate / vote this answer if it was helpful.
Thank you.