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CDM-Qx Satellite Modem Revision 5
Front Panel Operation MN/CDMQx.IOM
5–36
(ConfigFrameEDMAC, or ConfigFrameEDMAC-2) -
EDMAC or EDMAC-2
Comtech EF Data proprietary framing is included. The framing permits the bi-directional
passing of M&C and AUPC data between local and distant-end units. EDMAC is
backwards compatible with the CDM-500, CDM-550, CDM-550T, CDM-600 and
CDM-600L. EDMAC-2 is a reduced overhead version of EDMAC, and is not backwards
compatible with the modems listed above.
If either of these modes is selected, the following sub-menu will be displayed:
Select either AUPC-Only (default) or AUPC+EDMAC, using the ◄ ► arrow keys,
then press ENT.
Note that if framing is enabled (either EDMAC or EDMAC-2), then AUPC is
automatically enabled, but the specific EDMAC feature (passing M&C data from a local
to a distant-end unit) needs to enabled here.
If AUPC-Only is selected then none of the EDMAC features are available, even though
framing will still be enabled.
If AUPC+EDMAC is selected, the user is further prompted to select whether the unit is
an EDMAC master, or an EDMAC slave:
(ConfigFrameEDMACAUPC+EDMAC, or
ConfigFrameEDMAC-2AUPC+EDMAC) -
AUPC+EDMAC MODE
Select either MASTER or SLAVE, using the ◄ ► arrow keys, then press ENT.
An EDMAC MASTER is a unit which is local to the M&C computer, and which passes
messages, via the overhead, to a distant-end modem.
An EDMAC SLAVE is a unit that is not local to the M&C computer, which is at the
distant-end of a satellite link. If MASTER is selected then the following sub-menu is
displayed:
EDMAC Mode:
Master Slave (◄ ►, ENT)
Framing mix: AUPC
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O
nly
AUPC+EDMAC (◄ ►,