Call Features

Call Handling Features

✓ Warm Transfer
✓ Blind Transfer
✓ Do Not Disturb (DND)
✓ Call Forward All
✓ Call Forward Busy
✓ Call Forward No Answer
✓ Hold
✓ Reject
✓ Multi-way Calling*
✓ Redial
✓ Call Waiting
✓ On-hook Dialing
✓ Speakerphone

User Interface Features

✓ Call Logs
✓ LDAP Directory*
✓ On Device Directory
✓ Adjustable Ringer Volume
✓ Electronic Hook Switch (EHS)

*Not centrally provisionable.

Feature Keys

✓ 2 SIP Accounts
✓ 2 Upper Multifunction Keys
✓ Mute Button
✓ Voicemail Button


✓ Black & White Display
✓ Message Waiting Indicator (MWI)
✓ Caller ID (CID)
✓ Time/Date Display
✓ On-Screen Message Display

Network & Provisioning

✓ On Device Ethernet (PoE)
✓ PC Connection
✓ Web Interface Provisionable


✓ Wired Headset


Grandstream GXP1625

Quick Start

Tip: You do not need to dial any numerical prefix before dialing an extension or external number. Simply dial the extension or 10 digit number.

Call Forwarding
1.Press GrandstreamGXP1625_menu.
2.Select Call Features.
3.Select the desired Call Forward Type. ◦All: Forwards all incoming calls.
◦No Answer: Forwards all unanswered incoming calls.
◦Busy: Forwards calls that arrive when you’re already in a call.

4.Enter the internal extension or external number to which calls will be forwarded.
5.Press the Enable softkey*

To disable call forwarding, repeat steps 1-3 and then select Disable.

Tip: While your phone rings, press the Forward softkey* to forward the incoming call to another person.

Do Not Disturb (DND)

Enabling DND stops your phone from ringing and sends all incoming calls directly to voicemail. Calls are logged in your Missed Calls.
1.When the phone is idle, press GrandstreamGXP1625_dnd to enable/disable.

Voicemail Access
1.Press GrandstreamGXP1625_messages.
2.Dial your password (default 0000).

Speed Dial

Please contact your system administrator regarding your speed dial assignments.

3-Way Calls
1.While on an active call, press grandstreamGXP1625_conference.
2.Dial the internal extension or external number to add to the conference.
3.Press GrandstreamGXP1625_send.
4.Wait for the second party to answer.
Note: It is best practice to consult with the second party before adding them to a 3-way call.

5.Press grandstreamGXP1625_conference again.

Transfer Calls

Warm (Attended) Transfer

Places the current call on hold and initiates a call with the transfer destination to confirm whether the call is wanted or not. The two calls are then merged together.
1.Press an unprogrammed LINE key to place the current call on hold and initiate a new call.
2.Dial the internal extension or external number.
3.Speak with the destination party.
4.Press GrandstreamGXP1625_transfer and then press the flashing LINE key of the call that is on hold.

Note: If you hang up before the call rings, the transfer will fail and the call will be disconnected.

Blind Transfer

Routes the call to a third party, the original call is ended, and no confirmation is made to determine whether the transferred call is answered or if the number is busy.
1.While on an active call, press GrandstreamGXP1625_transfer.
2.Dial the internal extension or external number.
3.Press the Transfer softkey*.

Tip: To transfer a call directly to voicemail, dial 0 + extension.

1.Press GrandstreamGXP1625_hold.
2.Press the flashing LINE key to retrieve the call.

Modify Ringtone
1.Press GrandstreamGXP1625_menu.
2.Select Preference > Ring Tone.
3.Select the desired ringtone (highlight to sample ringtones).
4.Press GrandstreamGXP1625_menu.

Note: This device does not support silent mode.

Presence Monitoring

This device does not support this feature.

* Softkeys are buttons located around the display whose function changes depending on the context. These keys are managed by your system administrator.