Netopia 435 Reference Manual page 172

Other characters are invalid and will result in the rejection of
the entire entry.
The ? character represents a single-digit wildcard. While
matching the incoming caller ID with the Priority Ringing caller
IDs, any digit will be considered to be a match with the ?.
For example, if the caller ID was entered as 415-555-111?,
both incoming numbers 415-555-1112 and 415-555-1113
would be matches for Priority Ringing.
The maximum entry length is 20 characters although most
phone numbers do not exceed ten characters. For internal
matching against an incoming call, all characters that are not
digits or wildcards ignored.
2. For Ringing Tone, press Return twice. Select one of the ringing
patterns listed from the pop-up menu that appears.
1: 201-555-9911
2: 415-555-4018
3: 415-555-1212
4: 510/814-5???
5: 408-533?890
6: 415555111?
7:
8:
9:
10:
Enter Caller ID
You can enter a list of Caller IDs and associate a ringing tone with each ID.
You can test a ringing pattern by positioning the cursor on
Preview Ring and pressing Return. Select one of the ringing
patterns listed from the pop-up menu that appears. When one
or more telephones are hooked up to either of the Phone 1 or
Phone 2 jacks, the pattern will be briefly rung on the telephone
not in use.
Priority Ringing
Caller ID Ringing Tone
Normal
United Kingdom
Silence
PBX
Distinctive 2
Normal
Silence
Silence
Silence
Silence
PREVIEW RING
Telephone Services 8-7