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Called party
Calling party
0
CV-A
1
2
3
4
Figure A-2 CV-CV Convertor Type Table.
A trunk line has a CV of 4 and the internal DTE has a CV of 2. The CV connection
allowance is 2, which indicates `allowed with convertor' for both incoming and outgoing
data calls. Looking at the convertor type table gives convertor type 23, which will be
included in the data path for both an incoming and for an outgoing call.
• User Determines Convertor Type Used
If the CV connection allowance indicates that a modem is required either the ISPBX or the
extension user can indicate what type of modem must be used.
If the ISPBX makes that decision the second table as described above is used. With this
mechanism however, a DTE can only access the same convertor type every time the
extension makes the same outgoing data call (dialling the trunk access code and the
external number).
If the extension user wishes to select another modem type, for instance with another data
speed, then the user can select which convertor type is switched into the data path. The
user has to dial the `Convertor Prefix' and `Convertor Type Number' followed by the
trunk access code for the required destination and the external number. ISPBX now
selects a modem from the pool with the dialled convertor type number, overruling the
CV-CV convertor type table.
-
The convertor prefix (with res. id. 68) must be assigned in the analysis tree of the
calling party.
-
The convertor type number is defined using the OM command CRCTYP.
62
CV-B
0
1
2
3
4
15
15
23
23
Digits inside the array represents the
required MODEM Pool Type (0...254)
for the CV-CV Combination.
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