3Com VCX V7122/SIP VoIP Gateway User Manual
65
E1/T1 Configuration Parameters
In
Table 17
, where there are parameters shown in brackets they refer to the format
in the Embedded Web Server
*
.
Table 17
VCX V7122/SIP E1/T1/J1 Configuration Parameters
INI File Field Name
GUI Parameter Name
*
Valid Range and Description
PCMLawSelect
(TDMBusSettings>PCM Law
Select)
1 = A-law
3 =
µ
-Law
Usually A-Law is used for E1 spans and
µ
-Law for T1 and J1 spans.
FramingMethod
(Trunk Settings>Framing
Method)
For E1
0 = Multiframe with CRC4 (default, automatic mode, if CRC is
identified in the Rx, CRC is sent in Tx, otherwise no CRC)
a = Double frame
c = Multiframe with CRC4
For T1
0 or D = Extended super frame with CRC6 (default)
1 or B = Super frame D4, F12 (12-Frame multiframe)
A = F4 (4-Frame multiframe)
C = Extended super frame without CRC6
F = J1 - Japan (ESF with CRC6 and JT)
Selects the framing method to be used for E1/T1 spans.
FramingMethod_x
(Framing Method)
Same as FramingMethod for a specific Trunk ID (x = 0 – 7).
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