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SmartVoice Gateway(s) User Guide 49
YML832 Rev2
Long-Distance Control Table
This table controls the level of authority of an outgoing (transit out) call that is dialed through FXO and
diverted to PSTN, as below:
Descriptions:
•Digit strings in this table are prefixes that the gateway will check on dialed numbers in transit out
calls.
•This table is used to prohibit dialing any numbers started with specified prefixes.
•If Level 0 (the highest level) is set to prohibit dialing any number started with prefix 0204, then any
level below 0 (including Levels 1 to 5) are also prohibited.
•If Level 1 is set to prohibit dialing any number with prefix 0, then any level below 1 (including Levels
2 to 5) are also prohibited. Since Level 0 is not restricted to any prefix, therefore at level 0 users can
dial a number with the prefix 0.
Principle: Downward Restriction —If users at a higher level cannot dial a number with a
certain prefix, then users at lower levels also cannot dial a number with the same prefix.
Long Distance Exception Table
This table handles any exceptions to the long-distance call table.
Instruction:
•According to the Long Distance Control Table, users at Level 0 are prohibited from dialing a number
with the prefix 0204. But, if the number 020488988 is set in the Exception Table as above, then
users can dial this number.
Principle: Upward Opening — If the users at a lower level can dial a number with a certain
prefix, then the users at higher levels can also dial a number with the same prefix.