Switch board phone needed to transfer lines, etc.?

For the extension or for an outside line?

If the number matches the CID number, you should get the name as well. But here is the hard part.
IF your system requires you to dial an access code (say 9 to get an outside line) you may have that speed dial number saved as:
913125551212

If so, the incoming caller ID would have to match exactly, meaning CID would need to show 913125551212 in order for this to work.

BUT, caller id probably only shows 13125551212, and as such, wont work.

Your system might be restricted from transferring calls to another trunk (outside line)

This is a digital phone handset to use with a Avaya DIgital PBX. You will not be able to use this as a "regular" phone at your home with a tranditional phone line.

Do you have embedded voicemail, voicemail lite or voicemail Pro?

The auto attendant greeting, or the general mailbox greeting?

Press the voicemail button and enter whatever extension number you are trying to change. Kisten before you record, to make sure you are in the right place.

There is no default way to do this. The technician that set the system up will need to tell you the code to get in aand modify that wav file. There is no way to do so by default, it has to be set up, and can be anytihng.

Look at your config, for a short code that goes to a "vociemail collect" with the name recordings.....that is the code you use to modify.

What voicemail do you have?

Make sure that you have allow analog trunk to trunk connect enabled in lines, analog options.
That will take care of your problem unless someone deleted Call forward short code