ZyXEL Communications IP PBX X6004 - Manual (Page 323)

X6004 User’s Guide
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H A P T E R
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LCR
20.1 Overview
This chapter shows you how to configure dialing rules, also referred to as LCR
(Least Cost Routing) on the X6004.
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.
Figure 177 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 X6004
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
PSTN
ISDN
ITSP
LCR1
LCR2
Dial Condition
= 01.
Dial Condition
= 02.