Hello & Welcome,
I'm Greg and will do my best to assist you today.
Many land line phones do not have the ability, but let's check and find out.
To help you with this issue, may I ask:
1) The FULL Model Number of the phone system you are working with?
2) What phone service provider (phone company) you have for this phone line?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved?
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)