ZyXEL Communications ISG50 用户手册
ISG50 User’s Guide
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H A P T E R
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LCR
32.1 Overview
This chapter shows you how to configure dialing rules, also referred to as LCR (Least Cost Routing)
on the ISG50.
on the ISG50.
The following figure shows an example of two LCRs. LCR1 is composed of outbound line groups
PSTN and ISDN along with the dial condition 01. (the period (.) is part of the dial condition). LCR2
is composed of outbound line group ITSP along with the dial condition 02.. When a user calls
“021234” the call is routed through the outbound line group defined in LCR2.
PSTN and ISDN along with the dial condition 01. (the period (.) is part of the dial condition). LCR2
is composed of outbound line group ITSP along with the dial condition 02.. When a user calls
“021234” the call is routed through the outbound line group defined in LCR2.
Figure 341
LCR Components Example
When an LCR contains more than one outbound line group, as in the LCR1 example, the
administrator can prioritize the outbound line groups in the LCR. When a call is made using an LCR
with multiple outbound line groups, the ISG50 tries to use the higher priority outbound line group
first and, if the line is not available, then it tries a lower priority outbound line group.
administrator can prioritize the outbound line groups in the LCR. When a call is made using an LCR
with multiple outbound line groups, the ISG50 tries to use the higher priority outbound line group
first and, if the line is not available, then it tries a lower priority outbound line group.
The following figure shows a possible assignment of LCRs to authority groups. In our example, the
Sales authority group has been associated with both LCR1 and LCR2, so extensions that are part
of Sales can use any outbound line group they choose. The second authority group - Research,
Sales authority group has been associated with both LCR1 and LCR2, so extensions that are part
of Sales can use any outbound line group they choose. The second authority group - Research,
PSTN
ISDN
ITSP
LCR1
LCR2
Dial Condition
= 01.
Dial Condition
= 02.