Efficient Drop & Insert Mode - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
D&I
INSTALLED
ENH ASYNC
INSTALLED
AUPC
INSTALLED
I.3 Efficient Drop & Insert Mode
With Efficient Drop & Insert, the terrestrial interface selections, terrestrial framing modes,
terrestrial to satellite mapping, ES to ES channel, satellite and terrestrial backward alarm
functionality, and the In Station Prompt and Deferred Service alarm operation are identical to
that of the Drop & Insert Open Network standard. In addition, the selection and operation of
Enhanced Async and AUPC are identical to their closed network IBS counterparts. For more
information on these selections, refer to the appropriate section of the User's manual.
The following menu selections are utilized for controlling the additional functionality available
with efficient Drop and Insert:
MODULATOR or DEMODULATOR
NETWORK SPEC
CLOSED NET
SAT FRAMING
EFFICIENT D&I
DATA
DATA RATE (bps)
N x 64000 The data rate can be set to any N x 64 kbps rate based on the desired
SCRAMBLER CTRL
DISABLED The Efficient Drop & Insert mode utilizes a frame synchronous energy
MN-DMD50– Revision 3
required
optional, required if desired
optional, required if desired
Efficient Drop & Insert is a Closed Network selection
The satellite frame type is Efficient Drop & Insert
number of drop or insert slots. The following values of N are allowed
based on the terrestrial interface and terrestrial framing types shown
T1 Any framing
E1 Any PCM31
E1 Any PCM30
dispersal technique that is always on, thus there is no need for any
additional scrambling
Efficient Drop and Insert (D&I)
Any N from 1 to 24
Any N from 1 to 31
Any N from 1 to 30 as TS 16 is
automatically transmitted
I–2