How can I get the music on hold to work on the Panasonic Advance Hybrid System KX-TA624?

A bad connection by your Telco outside, on poles, or underground vaults or a bad connection in the box.

Panasonic Hybrid IP-PBX KX-TDA 50 User Manual.pdf

https://www.pbxmechanic.com > manuals > Panasonic ...
The Panasonic KX-TDA50 has been powering small office communications for now. It's a hybrid IP-PBX System and capable of supporting 48 digital KX-T7600 series ...

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  Panasonic Hybrid IP-PBX KX-TDA 50 Installation Manual.pdf

  https://www.pbxmechanic.com > manuals > Panasonic ...
  The Panasonic KX-TDA50 has been powering small office communications for now. It's a hybrid IP-PBX System and capable of supporting 48 digital KX-T7600 series ...

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

If this is VOIP then the problem is with Comcast. The settings need to be set to recognize a two line phone. The long way around this is to find out the equipment they are using for switching from a digital to an analog signal and call the manufacturer for help.

You don't, it won't fit inside the cover :-)

A Panasonic phone system has a port labeled EXT MUSIC. You run a cable from your music source to the port and program Background Music in software. Most of the phones then let you press "1" if you only have one music source, or dial a code and choose music 1 or 2.


Carl

Not sure of the model number, but Panasonic phones normally not connected to a TDA/TDE/NCP and TAW system have a toggle to turn background music ON/OFF. On the idle phone, press "1".

If that works, then I guessed right again :-) If not, try dialing *7510 on the intercom which will work on the systems mentioned above.

Carl

From the phone connected to Jack 01 (usually 101) press PROGRAM *#1234 and dial 000 and the SP PHONE button. Your display should show a blinking cursor over the year. Use the FWD and CONF buttons to go forward (and back) and the AUTO ANS or keypad to change the entries. Finish by pressing STORE

Carl

my telephone is lock forget pasword

to store a speed dial on the kx-t7730 with the Advanced Hybrid System KX-TA624 you press the following keys

<pick up the receiver>
2
*
<the number you want to have as speed dial>
<the number you want to dial>
<press the square shaped key next to 0 and 9>
<wait for dial tone to return>
<hang up>

To call using the now saved speed dial, press the square shaped key and then the number you have saved to speed dial

For example

<pick up receiver> 2*1555555555<square key> <wait for dial tone> <hang up>

This will mean that when you press the square key and 1, it will dial 555555555