3cx Good day! I want to connect 3cx and grandstream Phone GXV-3000! How to do it! Regards Serge!

https://forums.grandstream.com/t/phones-randomly-ringing/9518

From the Granstream User Manual (Page 44):
Restore Factory Default Setting
WARNING: Restoring the Factory Default Setting will delete all configuration information of the phone.
Please backup or print all the settings before you restoring factory default settings. Grandstream is not
responsible for restoring lost parameters and cannot connect your device to your VoIP service provider.
INSTRUCTIONS FOR RESTORATION:
Step 1: Press "OK" button to bring up the keypad configuration menu, select "Config", press "OK" to
enter submenu, select "Factory Reset" (Please refer to Table 5-1 of keypad flow chart)
Step 2: Enter the MAC address printed on the bottom of the sticker. Please use the following mapping:
0-9: 0-9
A: 22 (press the "2" key twice, "A" will show on the LCD)
B: 222
C: 2222
D: 33 (press the "3" key twice, "D" will show on the LCD)
E: 333
F: 3333
Example: if the MAC address is 000b8200e395, it should be key in as "0002228200333
395".
NOTE: If there are digits like "22" in the MAC, you need to type "2" then press "->" right arrow key to
move the cursor or wait for 4 seconds to continue to key in another "2".
Step 3: Press the "OK" button to move the cursor to "OK". Press "OK" button again to confirm. If the
MAC address is correct, the phone will reboot. Otherwise, it will exit to previous keypad menu interface.

https://www.grandstream.com/products/gxp_series/general/documents/gxp_usermanual_english.pdf

A copy of the user manual for your IP phone is found here: http://www.grandstream.com/user_manuals/GXV3000_User_Manual.pdf

I have browsed through and found no mention of an RJ-11 port on the back, only two RJ-45 Network ports, one for connecting to a PC in switch mode and one for ethernet mode.

If your phone is different and DOES have an RJ-11 port (as some IP phones do), I can only assume it is to connect to a landline to offer landline services as well as IP services.

Under those circumstances of course DO NOT attempt to plug in your landline RJ-11 into an RJ-45, it will not work and you risk shorting something out.

UNPLUG BATTERY FOR A FEW MIN. THEN PLUG BACK IN.

Here is a step by step that is very good:

http://grandstream.com/support/gxp_series/general/documents/gxp_interop_3cx.pdf

If you have any more specific questions, please let me know in a follow up. I just set up a 3CX system with these phones last month and it's pretty fresh in my mind.

Good luck!

I have the same problem Did you get an answer. Verizon wants I should talk to there expertise tech for a fee. Did anyone try it?

Go to internet
Type your the ip phone address
type admin as password if you never changed it
That's it

Sorry, not familiar with the Cisco products. Try to post generally and see if anyone else can identify with this product line.

Good luck.

if you have a password reset disk use that.otherwise
you must use the password recovery software

DEVICE BURNT OR NO FIRMWARE