Efficient Drop And Insert Mode - Comtech EF Data DMD-2050E Installation And Operation Manual

DMD2050E Universal Satellite Modem
E.9 Efficient Drop and Insert Mode
With Efficient Drop and 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 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, see 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
SCRAMBLER CTRL
DISABLED
INBAND RATE
150
300
MN-DMD2050E Revision 2
Efficient Drop and Insert is a Closed Network selection
The satellite frame type is Efficient Drop and Insert
The data rate can be set to any N x 64 kbps rate based on the desired
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
The Efficient Drop and Insert mode utilizes a frame synchronous energy
dispersal technique that is always on, thus there is no need for any
additional scrambling
Available when enhanced async is enabled, this field
allows the operator to set the Earth Station to Earth
Any N from 1 to 24
Any N from 1 to 31
Any N from 1 to 30 as TS 16 is
automatically transmitted
Efficient Drop and Insert
E–25