VCS VideoJet X.21, Руководство пользователя

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Introduction
19
VideoJet X.21/G.703
Manual
The G.703 port of the
VideoJet G.703
is directly connected to
this termination. The transmission rate is always 2.048 Mbit/s.
Also X.21/G.703 dial-up networks exist, when the connection is
established by dialling. However, the
VideoJet X.21/G.703
operates on the basis of a X.21/G.703 leased line for which the
function for establishing the connection via a dial-up connection is
not supported.
VideoJet X.21/G.703
is available in two versions, as a
VideoJet
XS/GS
sender or as a
VideoJet
XE/GE
receiver. The
sender links every PAL or NTSC video source at that side, which is
being monitored to the X.21/G.703 transmission port. The receiver
displays the video image on any standard PAL or NTSC monitor on
the receiving end of the X.21/G.703 leased connection. Remote
control of peripheral components like pan/tilt/zoom cameras is facil-
itated by the bidirectional serial interface.
With the audio option, bidirectional transmission of audio signals
across the X.21/G.703 leased line is also possible. An additional “A”
in the name indicates that the audio option is included. For exam-
ple,
VideoJet
XS/GS
senders with the audio option have the des-
ignation
VideoJet
XSA/GSA
.
VideoJet
XE/GE
receivers with
audio are called
VideoJet
XEA/GEA
. Two additional cinch sockets
for audio input and output and an RJ11 socket for a telephone
handset are led out of the housing for the audio option only.
Subsequent reconfiguration of a
VideoJet
XS/GS
sender to a
Vid-
eoJet
XE/GE
receiver is not possible. A complete system always
comprises an encoder (sender) and a decoder (receiver).
Subsequent upgrading to include the audio option is not possible
either.