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Chapter 3. Operation
61200300L1-1
FXS+ Quad & Dual Voice Option Module User Manual
3-7
MODE
Mode
sets the type of 2-wire to T1 signalling and supervision
to be used. Choices include:
FXS_LS
This mode sets the port to use FXS loop-start signalling on
the T-Span and loop-start supervision on the analog 2-wire
interface.
It also supports far-end disconnect by removing tip-ground
during the call if signalled to do so over the T-Span. When
used with an ADTRAN FXO+, this feature allows line-
current dropouts to be passed on to equipment connected to
the FXS+ 2-wire port.
Line Side Answer Supervision (LSAS) reverses Tip and Ring
polarity when a call originated from the FXS+ is answered.
To use this feature,
ANSWER S’VSN
must be enabled and
the port must receive Reverse Loop Current Feed (RLCF)
signalling on the T-span. Ringing cadence will follow that
provided over the T-Span or detected by the FXO port at the
far-end.
FXS_GS
This mode sets the port to use FXS ground start supervision
on the analog 2-wire interface. Ground start operation is
often used with trunk interfaces to PBS and key systems to
prevent glare conditions. Ringing cadence will follow that
provided over the T-Span or detected by the FXO port at the
far-end. Line Side Answer Supervision is also supported.
TANDEM_LS
This mode sets the port to use E&M signalling on the T-Span
and loop-start supervision or on the analog 2-wire interface.
When using this mode, line-current dropout for 500 ms is
provided when a call terminates and the far-end hangs up.
This may be useful for voice-mail or modem systems that
need far-end disconnect supervision. This mode also requires
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Страница 12: ...List of Figures xii FXS Quad Dual Voice Option Module User Manual 61200300L1 1...
Страница 14: ...List of Tables xiv FXS Quad and Dual Voice Option Module User Manual 61200300L1 1...
Страница 42: ...Chapter 3 Operation 3 18 FXS Quad Dual Voice Option Module User Manual 61200300L1 1...
Страница 44: ...Appendix A FXS Failure Messages A 2 FXS Quad and Dual Voice Option Module User Manual 61200300L1 1...
Страница 52: ...Appendix B Signalling States B 8 FXS Quad and Dual Voice Option Module User Manual 61200300L1 1...
Страница 56: ...Index Index 4 FXS Quad and Dual Voice Option Module User Manual 61200300L1 1...
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