If any portion of the documentation below is inaccurate or incomplete please submit a ticket with a link to the document. A member of our staff will review your request as soon as possible.

Where can I obtain a cheat sheet or user manual for my Grandstream GXP21XX, GRP26XX model phone?

How do I unlock the keypad on my Grandstream GXP21XX or GRP26XX model phone?

How do I disable Do Not Disturb on my Grandstream GXP21XX or GRP26XX model phone?

How do I disable Call Forwarding on my Grandstream GXP21XX or GRP26XX model phone?

Conference fails on my Grandstream GXP21XX or GRP26XX model phone when Call Compression is enabled.

How do I set volume levels on my Grandstream GXP21XX or GRP26XX model phone?

How do I change the ring tone on my Grandstream GXP21XX or GRP26XX model phone?

What headsets are compatible with my Grandstream GXP21XX or GRP26XX model phone?

How do I pair my mobile phone with my Grandstream GXP21XX or GRP26XX model phone?

How do I access the programmable keys on my Grandstream GXP21XX or GRP26XX model phone?

How do I configure BLF keys to monitor device status for other phones on my account from my Grandstream GXP21XX or GRP26XX model phone?

How do I configure a speed dial key to call a home phone or cell phone from my Grandstream GXP21XX or GRP26XX model phone?

How do I configure a programmable key to use a specific line or Caller ID when placing a call from my Grandstream GXP21XX or GRP26XX model phone?

How do I configure a one-touch transfer key to automatically transfer a call to another extension, home phone or cell phone from my Grandstream GXP21XX or GRP26XX model phone?

How do I configure call parking so I can place a call on hold from my Grandstream GXP21XX or GRP26XX model phone and answer the call from another phone?

My Grandstream GXP21XX or GRP26XX model phone contains paper labels. How do I find printable PDF key labels for my Grandstream GXP21XX or GRP26XX model phone?

What is the user password for the web interface on my Grandstream GXP21XX or GRP26XX model phone?

Why does the date on my phone say 1969, my phone display says NETWORK DOWN or a flashing network cable has appeared on my display?

Why does my phone show 0.0.0.0 as my IP address?

How do I test audio quality on my Grandstream GXP21XX or GRP26XX model phone?

How do I setup Grandstream individual phonebook or global phonebook for my account?

My individual or global phonebook has been applied. How do I update my phones to see the new phonebook?

I updated my phonebook but some entries still contain old entries.

How many Phonebook entries can my phone store?