Sony SPP-Q200 - Manual (Page 22)

Memory dialing
If you use a Private Branch Exchange (PBX)--------
You need to dial a digit (such as 9) to access an outside line before
you dial a phone number.
To store the phone number:
1 Enter the outside line access digit.
2 Press REDIAL/PAUSE to enter a pause (to allow the phone
time to access the outside line.)
3 Enter the phone number you want to store.
To keep a directory
Use the directories supplied. Following is an example of directory
usage.
Remove.
Attach back to directory.
Be sure not to cover the ringer
hole. If you do, it will be
difficult to hear the ringer.
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Memory dialing