16: Analogue Leased Line interface
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© Virtual Access 2016
GW6600 Series and GW6600V Series User Manual
Issue: 1.5
Page 150 of 384
16
Analogue Leased Line interface
The Analogue Leased Line (ALL) interface provides a 2- or 4-wire analogue interface. The
behaviour of the interface depends on the application using it. The interface can
currently be used with two applications: Terminal Server or CESoPSN.
The ALL interface has the device name ‘ttyLC0’.
16.1
Terminal Server: V.23 modem emulation
When used with the Terminal Server application the ALL interface enables a V.23 modem
emulation. The V.23 modem emulation passes the decoded modem call data to the
terminal server application.
Note: gain and attenuation cannot currently be controlled when operating in V.23
modem emulation mode.
16.2
CESoPSN: transparent mode
When used with CESoPSN, the PCM encoded data is passed transparently to the
application which then encapsulates in CESoPSN data packets.
16.3
Gain and attenuation control
The ALL interface provides you with the possibility to adjust the gain and attenuation.
The diagram below shows the signal flow and the options available to control it.