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CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®
Front Panel Operation
5.4.5
CONFIG: Frame
Framing requires a modulator/demodulator pair grouped into a modem (refer to
the previous section, Sect. 5.4.4 CONFIG: Group, for details).
Framing Mode: Unframed
EDMAC-2
Select Unframed, EDMAC, EDMAC-2, or D&I++ using the ◄ ► arrow keys, then press
5.4.5.1
CONFIG: Frame
With this selection, there is no framing – no overhead is added, and the unit will be compatible with
other manufacturer's equipment when operating in a 'standard' configuration.
5.4.5.2
CONFIG: Frame
Framing mix:
AUPC+EDMAC
From either submenu – EDMAC or EDMAC-2 – select AUPC-Only or AUPC-EDMAC using
the ◄ ► arrow keys, then press
EDMAC
EDMAC-2
This Comtech EF Data proprietary framing permits the bidirectional passing of M&C and AUPC
data between local and distant-end units. Note that, if framing is enabled (either EDMAC or
EDMAC-2), 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:
CONFIG: Frame
EDMAC Mode:
Master
Select Master or Slave using the ◄ ► arrow keys, then press
•
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.
D&I++
Unframed
EDMAC, EDMAC-2
AUPC-Only
(◄ ►,ENT)
ENTER
EDMAC is backwards compatible with Comtech EF Data's CDM-500, CDM-550,
CDM-550T, CDM-600, and CDM-600L modems.
EDMAC-2 is a reduced overhead version of EDMAC, and is not backwards
compatible with the modems listed above.
EDMAC, EDMAC-2
Slave
EDMAC
(◄ ►,ENT)
. Note the following:
AUPC+EDMAC
(◄ ►,ENT)
5–31
MN/CDMQX.IOM
. Note the following:
ENTER
Revision 7
.
ENTER
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