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PERCEPTIONehex
LCR/TR PROGRAMMING GUIDE
MARCH 1991
6.20 Programming
Example
#2
6.21 Least
Cost Routing
a)
b)
c)
d)
e)
f )
9)
In this case, the system is located in the Chicago
area (NPA = 312).
For Least Cost Routing purposes,
the outgoing
trunk calls are divided into four different
areas.
1) Route Table #I = Local area (NPA = 312).
2) Route Table #2 = Metro area (NPA = 312).
3) Route Table #3 = Illinois.
4) Route Table #15 = Rest of North America.
3) CLS 2 = Local/Metro,
Illinois, Wisconsin,
and
Indiana calls allowed only, with one exception-
(714)730-XxXx
(also allowed).
4) CLS 3 = No restriction
at all.
Time = 7 p.m. (= 1900).
Number
dialed = (618)NNX-XXXX.
Station Class of Service = COS 1.
Station Toll Restriction
(TR) class = CLS 2.
6.23
Sequence
of events:
There are five trunk groups:
1) Trunk Group #0 = Local lines.
2) Trunk Group #l = Metro lines.
3) Trunk Group #2 = Illinois WATS lines.
4) Trunk Group #3 = Local lines. Available
to
LCR class 1 only.
5) Trunk Group #4 = WATS lines to all North
America.
1)
2)
3)
4)
User pushes DN button.
l
Dial tone is received.
LCR access code 5 is dialed.
l
Dial tone is still received.
Digit 0 is dialed.
l
Dial tone is removed.
One Special Common
Carrier (SPCC) is used.
An access code (730 0000) and an authoriza-
tion code (65432)
are used to access SPCC.
Three LCR classes (routing priorities) are used
in this application.
1) COS 0 = LCR class #l .
2) COS 1 = LCR class #2.
3) COS 2 = LCR class #3.
Local calls are routed according
to Route Table
#I.
This is defined
by the Area Office
Code
Table #I (TNOOl).
Area Code and Office Code are dialed, which in
this case = (618)NNX
(non-555
call).
l
No overflow tone received (this number is not
restricted).
5)
6)
7)
8)
Station number
(XXXX) is dialed.
Route Table #3 is selected.
At this time, all trunks in Trunk Group #2 are
busy. Trunks in Trunk Group #0 are idle.
Route3
(RT3) is selected and the SPCC signals
sent out on Trunk Group
#00 are: l-second
pause, 730 0000,6-second
pause, 654321618
NNX XXXX.
Other Route Tables are addressed
(pointed
to)
in the Area Code Tables 0 w 15.
9)
If an SMDR
is connected,
the printout
for the
called number
= l-61 8-NNX-XXXX.
NOTE:
NOTE:
No numbering
relationship
exists between
the
Area
Code
Tables
and Area
Office
Code
Tables,
unless defined
as such in the Area
Office Code Table.
This sequence
can be followed
step-by-step
in the Detailed
Logic Flowchart.
6.22 Toll Restriction:
For toll restriction
purposes,
there are, in this case, four Restriction
Class Tables
used:
1) CLS 0 = Internal calls only.
2) CLS 1 = 312 Area Code (local and metro) calls
only,
with
one
exception-(71
4)730-XxXx,
which is allowed to be dialed.
-14-
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