NetComm SmartVoice Gateway - Manual (Page 49)

SmartVoice Gateway(s) User Guide 49
YML832 Rev1
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.