4RF Aprisa XE User Manual page 120

118 | Configuring the Traffic Interfaces
14. The DFXS Signalling Advanced options are used to control the four CAS bits ABCD in the DFXO to DFXS
direction of transmission and one CAS bit A in the DFXS to DFXO direction of transmission. This option
sets the signalling for both DFXS card ports.
Transparent Normal mode is used for normal traffic and Transparent Inverted mode can be used for
special signalling requirements when a function needs to be reversed e.g. to change the idle polarity
of the DFXS line feed voltage.
Forced modes are used to disable particular functions e.g. when polarity reversals are not required.
They can also be used for system testing e.g. to apply DFXS continuous ringing output
Selection
Transparent Normal
Transparent
Inverted
Forced Normal
Forced Inverted
DFXO to DFXS
CAS Bit
A bit (fault)
B bit (ring)
C bit (billing)
D bit (reversal)
From DFXS to DFXO
CAS Bit
A bit (off hook)
Description
Normal transparent transmission of the CAS bit
Transparent transmission of the CAS bit but inverts the
polarity.
Sets the CAS bit to 1 (inactive).
Sets the CAS bit to 0 (active).
Forced Normal
Sets the CAS A bit to 1
continuous fault state
Sets the CAS B bit to 1
no DFXS ringing output.
Sets the CAS C bit to 1
no DFXS billing tone output.
Sets the CAS D bit to 1
no DFXS polarity reversal
Forced Normal
Sets the CAS A bit to 1
no DFXO off hook
Aprisa XE User Manual
Forced Inverted
Sets the CAS A bit to 0
no fault state
Sets the CAS B bit to 0
continuous DFXS ringing output.
Sets the CAS C bit to 0
continuous DFXS billing tone
output.
Sets the CAS D bit to 0
continuous DFXS polarity reversal
Forced Inverted
Sets the CAS A bit to 0
continuous DFXO off hook
Default