C H A P T E R 3 : S E T U P O F T H E E 1 / T 1 B O A R D P A R A M E T E R S
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3.1.7 Coding Law
The coding law parameter defines the companding characteristic that is used
on the PC internal TDM bus. The companding characteristic is a formula
which translates the amplitudes of the sampled voice signal into the 8 bit
code words. Supported coding laws are A-Law and Mu-Law. The coding
law must match the coding law of the speech file that is send through a
system under test. Please note, this parameter does not refer to the telephone
line coding law.
3.1.8 Line Build Out
There are two parameters applicable for the line build out, the Line Build
Out Loss parameter and the Overwrite parameter. The Line Build Out Loss
parameter is used to control loss for different lengths of the line and
applicable only to T1 protocols. The second parameter, Overwrite, enables
users to write to the 3 Pulse Mask (XPM) registers, thus controlling the
trunk’s analog pulse shape (applicable to E1 and T1 trunks).
3.1.9 Destination Numbering Type
The type of the destination (called) number as defined in Q.931(ISDN only).
3.1.10 Destination Numbering Plan
The plan number of the destination (called) number as defined in Q.931
(ISDN only).
3.1.11 Source Numbering Type
In the case of ISDN, this parameter specifies the type of the source (calling)
number as defined in Q.931. For MFC-R2 protocols, the source number type
is used to provide the calling number category.
3.1.12 Source Number Presentation
Presentation of source phone (calling) number as defined in Q.931 (ISDN
only).
3.1.13 Source Number Screening
Screening of source phone (calling) number as defined in Q.931 (ISDN
only).
3.1.14 Source Phone Number
Specifies the phone number of the calling (originating) party for protocols
that use ANI (Automatic Number Identification) or CLI (Calling Line
Identification).
3.1.15 Source Phone Subnumber
Specifies the source sub address phone number for ANI.
