Mocomtech CDM-570 - Manual (Page 152)

CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Front Panel Operation MN/CDM570L.IOM
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6.9.1 (CONFIG, FRAME) UNFRAMED
No framing is selected. No overhead is added, and the unit will be compatible with other
manufacturer’s equipment, when operating in a ‘standard’ configuration.
6.9.2 (CONFIG, FRAME) EDMAC or EDMAC-2
Comtech EF Data’s proprietary framing is added. 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 completely
backwards compatible with the modems listed above, but is in some modes (for example,
in Turbo BPSK modes and at rates above 2.048 Mbps).
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 ENTER.
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, then the user is further prompted to select whether the
unit is an EDMAC master, or an EDMAC slave:
(CONFIG, FRAME, FRAMED EDMAC+AUPC, MODE)
Select either Master or Slave, using the ◄ ► arrow keys, then press ENTER.
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 which 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 (
◄ ►,ENTER)
Framing mix: AUPC-Only
AUPC+EDMAC (
◄ ►,ENTER)