Hi again
Hi whosrdaddy I was waiting for your opinion. You are an Expert
I like Alex and I find code for the application system North America
AS Code = 30
And I find some differences between AS Standard and North America
For example
Amplification/attenuation
AS Standard
Amplification/attenuation
STANDARD law of companding A is used in this application system.
The speech signals can be amplified or attenuated when passing through the switch. The following line types exist which are equal to the value found in the TRM-parameter.
[tt]
TRM Line type
0 Analogue/digital extension lines, IP extensions, PABX operator lines
1 Reserve
2 Reserve
3 Reserve
4 Analogue external line
5 Digital external line
6 2-wire tie line
7 4-wire tie line
[/tt]
AS North America
Amplification/attenuation
USA law of companding MY is used in this application system.
The speech signals can be amplified or attenuated when passing through the switch. The following line types exist which are equal to the value found in the TRM-parameter.
[tt]
TRM Line type
0 Digital extension lines, PABX operator lines, IP extensions
1 Special setup for 203 Phones
2 Analogue on premise Ext. (ONS)
3 Analogue off premise Ext. (OPS)
4 Analogue tie Trunk (A/TT)
5 Digital tie Trunk (D/TT)
6 Analogue external Trunk line (A/CO)
7 Digital external Trunk line (D/CO)
[/tt]
The next what I find is Span Converter
Copy from Alex:
The Span Converter is a K2 board designed to provide carrier adaptation between T1 transmission (1.544 Mbit/s, PCM24) and E1 transmission (2.048 Mbit/s, PCM30, CEPT). The primary purpose of the board is to provide inter-LIM (or Group Switch) communication utilizing T1 public access network. Basic signaling transmission provided by the group switch modules is E1, providing frame and service information in channel 1 (time slot 0). In North America, however, transmission over the digital public network requires T1 transmission.