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C H A P T E R
4
F E A T U R E S
4.3.15 The LOG HELP menu
In most cases, the commands are self-explanatory with [S]tart, [E]nd, [U]p, [D]own moving the viewing
window to the relevant point in the trace buffer. [L]ist outputs the contents of the whole trace buffer,
which may be useful when capturing the trace to a file and [C]lear empties the buffer. The [P]ause
command freezes the trace buffer and stops recording status messages. When the[R]esume command is
entered, the last page in the buffer is repeated together with the next five messages from live output. The
display then continues in real-time.
4.4
Call Progress Tones
With the ability to dynamically route telephone calls through the network, the V100 can act as a small
PABX. It is therefore the case that in order to provide the subscriber with meaningful information while a
call is connected, the V100 must provide audible call progress tones. Many applications for the V100
involve a satellite delay between subscribers and so no tones are generated for 600mS after a call
sequence is commenced, to avoid confusion during the latency.
In the simplest scenario, the telephone is lifted and if bandwidth is available via the prescribed route and
the destination party is not busy, the call is connected and the caller hears a ringing cadence, according to
the country code selected, until the call is answered.
If the call is connected but the destination party is busy, the caller hears an "unavailable" tone pattern
(long beeps, slow repeat).
V100 Versatile Multiplexer Technical Manual Version 2.2
Page 145 of 231
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