Operator's Manual

OM-E 2072-09689-00
A-6
Table A-2. Use of “?” Wildcard Symbol
Pattern Interpretation
A B C
“Standard” 3-character address, shown here for reference. All the characters in this
word must be evaluated
A B ?
A ? C
? B C
“Standard” “wild-1” address word. Indicates that only the positions occupied by other
characters (“A” and “B”) need be evaluated: the position occupied by the “?” symbol
can be ignored (ignored in this context means that any valid character is accepted)
A ? ?
? B ?
? ? C
“Standard” “wild-2” address word. Indicates that only the position occupied by an
character (“A”, “B” or “C”) need be evaluated: the positions occupied by the “?” symbols
can be ignored
? ? ?
“Standard” “wild-3” address word. Indicates that all of the three positions in this word
can be ignored
A B @
“Stuff-1” reduced address field, shown here for reference. Only the first two characters
in this word must be evaluated
A ? @
? B @
“Wild-1” “stuff-1” address. Only the character “A” or “B” in this word must be evaluated
? ? @
“Wild-2” “stuff-2” address. Only the character “A” or “B” in this word must be evaluated
A @ @
“Stuff-2” reduced address field, shown here for reference. Only the first character in this
word must be evaluated
? @ @
“Wild-1” “stuff-2” address. Only t
he first character in this word must be evaluated, and is
ignored
@ A B
“Double selective AnyCall” address word, shown here for reference: only the last two
characters in this word must be evaluated
@ A ?
“Double selective AnyCall” “wild-1” address word: only the middle character “A” in this
word must be evaluated
@ ? B
Not permitted. Use “selective AnyCall”
@ ? ?
Not permitted. Use “global AnyCall”
@ @ A
“Selective AnyCall”: see Table A-1
@ @ ?
“Global AnyCall”: see Table A-1
@ A ?
“Selective AllCall”: see Table A-1
@ ? @
“Global AllCall”: see Table A-1
? @ ?
“Inlink address”: see page A-7
A-6.2.5 AllCall Addresses
An AllCall is a general broadcast that does not request responses and does not designate any specific
addressee: a call with this address is accepted by any station, which then stops scanning and listens to
the call. The most common use of AllCalls is in cases of distress: when in distress, it is more likely to
want to make any available connection in the minimum period of time than to issue a call to an
individual or to a select group.
The global AllCall address is @?@. As a variation, the calling station can also use selective AllCall.
Basically, the selective AllCall address is identical in function to the global AllCall, except that it
specifies the last single character of the addresses of the desired subgroup of receiving stations (that is,
it replaces the ? with an alphanumeric – see more details in Table A-1). Any station whose address
matches the pattern stops scanning and listens.