Transfer Calls with a Grandstream Phone
Explore the different types of transfers you can use to connect a caller's call to another person.
Written by Val Campos
Updated at May 15th, 2025
While handling a call, it may be necessary to pass the phone call along to a user, call queue, or an external phone number. This can be done through transferring.
While handling a call on your Grandstream desk phone, there are three different types of transfer that can be utilized depending on how exactly the call needs to be transferred and handled:
- Blind Transfer - Transfer a call directly to another person without talking to that second person. This is method of transferring is also referred to as a “cold” or "unassisted" transfer.
- Attended Transfer - Speak with the person being transferred to before completely transferring the call. This method of transferring is also referred to as a “warm” or “assisted” transfer.
- Voicemail Transfer - Transfer a caller directly to a general mailbox or the voicemailbox of another user.
Use the module below to view step-by-step instructions about how you can perform these different transfers:
Blind Transfer
When you use a blind transfer, you transfer a call without speaking to the party that the call will be transferred to. The person receiving the transfer will need to answer the transferred call.
To perform a blind transfer…
1. While on an active call, press the Transfer button or softkey.
Note: The caller will be placed on hold automatically where they will listen to music on hold.
2. On the Dial screen, do one of the following:
• Dial the extension or phone number you want to send the call to.
• Press the speed dial or BLF button of the person that should receive the transfer.
3. Press the BlindTrnf softkey to complete the transfer.
Attended Transfer
Perform an attended transfer if you want to talk to the person receiving the transfer. This can be a great way to check that the person being transferred to is actually ready to receive a transfer. If the second person answers your call and an attended transfer is completed, the caller will be directly connected to the second person without the need for them to answer the call.
Quick Tip: If you decide you do not want to talk to the person you are transferring to, you can perform a semi-attended transfer. To do so, you can press the Transfer button or softkey while the call is still ringing.
1. While on an active call, press the Transfer key.
Note: The caller will be placed on hold automatically where they will listen to music on hold.
2. On the Dial screen, do one of the following:
• Dial the extension or phone number you want to send the call to.
• Press the speed dial or BLF button of the person that should receive the transfer.
3. Press the AttTrnf softkey.
4. Wait for the second person to answer and talk to them as needed.
5. Press the Transfer key again to complete the transfer.
Transfer to Voicemail
In some instances, a caller may need to reach out to a user that is not able to accept a transfer at the moment. If this is the case, the caller can instead be transferred to a user's voicemailbox to leave a message.
To transfer a caller to a user's voicemailbox…
1. While on an active call, press the Transfer button or softkey.
Note: The caller will be placed on hold automatically where they will listen to music on hold.
2. On the Dial screen, do one of the following:
• Dial 03 and the mailbox's extension number.
• Dial 03 and press the BLF button of a coworker.
For example… To transfer the caller to the mailbox of user 100, dial 03100. To transfer the caller to general mailbox 500, dial 03500.
3. To complete the transfer, press the BlindTrnf softkey.
