CDM-Qx Satellite Modem

Revision 5

Front Panel Operation

MN/CDMQx.IOM

(Config„Frame„EDMAC, or Config„Frame„EDMAC-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-2is 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:

Framing mix: AUPC-Only

►,

AUPC+EDMAC

(

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-Onlyis 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„AUPC+EDMAC, or Config„Frame„EDMAC-2„AUPC+EDMAC) -

AUPC+EDMAC MODE

EDMAC Mode:

(◄ ►, ENT)

Master Slave

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:

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Mocomtech CDM-QX operation manual Framing mix AUPC-Only, Aupc+Edmac, Edmac Mode, Master Slave