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Matrix NAVAN CNX200 System Manual
Behind the PBX Application
It is common for small and medium PBXs to be connected to larger PBX systems, where the trunks of the larger
PBX are connected to the extension ports of the smaller system. This is usually done for the purpose of expanding
the capacity of the large PBX already in use.
Such configurations are referred to as 'Behind the PBX Application'.
How it works
Consider the following illustration.
PBX-A is connected behind NAVAN. In this 'Behind the PBX' configuration, the Trunk Lines T4, T5, T6 of NAVAN
are connected to the Extensions (SLT) S4, S5, S6 of PBX-A.
However, Trunk lines T1 and T2 of PBX-A are connected directly to the CO.
In such application scenarios, implementing toll control restrictions for the trunks becomes difficult for NAVAN.
For example: Extension Number 21 of NAVAN in the above illustration is not allowed the facility of long distance
dialing. It has access to all the CO trunks.
When the user of Extension 21 wants to access T1, T2 or T3 (which are direct trunks from the CO to NAVAN) the
user dials '0' (or the Trunk Access Code assigned) and gets CO dial tone. When the user dials the number, NAVAN
applies Toll Control.
Similarly, when the user of Extension 21 tries to grab a trunk T4, T5 or T6 (which are connected to extensions of
PBX-A) by dialing Trunk Access Code '0', the user gets the dial tone of PBX-A. This means, the user of Extension
21 must dial '0' again to grab CO dial tone of the T1 or T2 connected to PBX-A.
However, when the user dials '0' again, NAVAN applies Toll Control. It detects the dialed number as ‘00’ and
interprets this as an attempt to dial a long distance number. Since Extension 21 is not allowed long distance dialing
in its Toll Control, NAVAN rejects dialing on the trunk and plays an error tone to Extension 21.
Summary of Contents for NAVAN CNX200
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Page 26: ...16 Matrix NAVAN CNX200 System Manual NAVAN CNX226 3G NAVAN CNX226 2G2 ...
Page 27: ...Matrix NAVAN CNX200 System Manual 17 NAVAN CNX208 3G2 NAVAN CNX244 3G2 ...
Page 28: ...18 Matrix NAVAN CNX200 System Manual Application of NAVAN ...
Page 118: ...108 Matrix NAVAN CNX200 System Manual To exit the SA mode click Logout on the top of the page ...
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Page 419: ...Matrix NAVAN CNX200 System Manual 409 1 Click Device Settings Location1 to expand options ...
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Page 900: ...890 Matrix NAVAN CNX200 System Manual Pick up the handset Dial 1070 Replace handset ...
Page 912: ...902 Matrix NAVAN CNX200 System Manual Exit System Administrator mode ...
Page 930: ...920 Matrix NAVAN CNX200 System Manual Replace handset ...
Page 994: ...984 Matrix NAVAN CNX200 System Manual You may log out of Jeeves ...
Page 1072: ...1062 Matrix NAVAN CNX200 System Manual To Retrieve Message Wait Pick up the handset Dial 1077 ...
Page 1086: ...1076 Matrix NAVAN CNX200 System Manual To resume outgoing speech Press Flash Key Dial 1052 ...
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Page 1308: ...1298 Matrix NAVAN CNX200 System Manual The End IP Address ...
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Page 1356: ...1346 Matrix NAVAN CNX200 System Manual NAVAN Features tested on IP Phones of different Brands ...
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