Table of Contents

GXP-1400, GXP-1610, GXP-1620, GXP-1625

Where can I obtain a cheat sheet or user manual for my GXP14XX or GXP16XX model phone?

How do I disable Do Not Disturb on my Grandstream GXP14XX or GXP16XX model phone?

How do I disable Call Forwarding on my Grandstream GXP14XX or GXP16XX model phone?

Why does my phone display occasionally disappear?

Conference fails on my Grandstream GXP14XX or GXP16XX model phone when Call Compression is enabled.

How do I set volume levels on my Grandstream GXP14XX or GXP16XX model phone?

What headsets are compatible with my GXP14XX or GXP16XX model phones?

Technical Troubleshooting

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 GXP14XX or GXP16XX model phone?

My Grandstream phone displays MISSED CALLS but I am unable to clear the missed calls log.

My phone was successfully activated but displays the incorrect extension on my Grandstream GXP14XX or GXP16XX model phone display.

Phonebooks

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?