Comtech EF Data CDM-625, Инструкция по установке и эксплуатации

Страница: 81 / 322

CDM-625 Advanced Satellite Modem Revision 1
Front Panel Operation MN-0000036 (Ref MN/CDM625.IOM)
•
Audio
•
LVDS
•
HSSI
•
IP
•
ASI
The
AUDIO
choice permits the user to carry 2 x 32 kbps ADPCM audio as the primary data.
This mode restricts the available framing types to IBS or EDMAC.
The second parameter is the
Framing
type. The options are:
•
None
•
IBS
(FAST option)
•
IDR
(FAST option)
•
D&I s
(FAST option)
(Drop & Insert), which include:
o
D&I
(FAST option)
o
D&I++ (
FAST option
)
o
QDI (Quad Drop & Insert) (
FAST option
)
•
EDMACs, which include:
o
EDMAC
o
EDMAC2 (as in the CDM-570)
•
ESC++
EDMAC
is Comtech EF Data’s proprietary framing. The framing permits bi-directional passing
of M&C and AUPC (Automatic Uplink Power Control) 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 (e.g., in Turbo BPSK modes and
at rates above 2.048 Mbps). For further information, refer to
Chapter 11. EDMAC CHANNEL
.
D&I++
is another Comtech proprietary framing – it is a closed-network frame structure, similar
to D&I, but which permits AUPC and EDMAC. See
Chapter 9. CLOCK MODES and DROP
& INSERT (D&I)
for further information.
D&I Enhanced
is available – when in E1-CCS, may enable ESC, and then AUPC.
ESC++
is another Comtech proprietary framing – it is a closed-network frame structure, which
permits AUPC, EDMAC and ESC. For further information, refer to
Chapter 12. ESC++.
5–9