Black Box ME260A, Руководство пользователя

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18
MODULAR MODEM ELIMINATOR
2.3 Applications
This section provides a description of the functions performed by the Modular
Modem Eliminator. For illustration purposes, this section includes typical
diagrams of interface signals flow. The signal names used on these diagrams
are in accordance with the conventions that apply to the RS-232 interface;
for information on the signals corresponding to other interface standards,
refer to the interface-conversion table in
Appendix A
.
2.3.1 I
NTERFACE
-C
ONVERTER
A
PPLICATIONS
Typical interface-converter applications for the Modular Modem Eliminator are:
• Connection of a DTE to a DCE that has a different interface. Any combination
of DTE and DCE interfaces can be supported, by installing the appropriate
type of plug-in interface modules in the Modular Modem Eliminator.
In a typical application, a Modular Modem Eliminator could be used to connect
a V.35 host port to an X.21 data network ( Figure 2-6 , for example). In this case, the
Modular Modem Eliminator will be equipped with a V.35 plug-in module on the
host side, and with an X.21 module on the network side. During the installation,
the DCE/DTE switches of the plug-in modules are set in accordance with the
function to be simulated by the Modular Modem Eliminator (DCE on the host
side, DTE on the network side).
Figure 2-6. V.35 port to X.21 modem interface-converter application.
PCU
ME260A
64 kbps
X.21
V.35
DTE
DTE
DCE DCE
Modem
Line