Efficient Drop & Insert Mode - Radyne DMD2050 Operation Manual

Appendix E
E.2 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 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
SCRAMBLER CTRL
DISABLED
INBAND RATE
150
300
600
1200
2400
4800
9600
19200
E-2
Efficient Drop & Insert is a Closed Network selection
The satellite frame type is Efficient Drop & 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 & 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
station in-band rate. In most cases, this should be set to the
same rate or higher than the ES port baud rate. When this
rate is set lower than the ES port baud rate, the user must
insure that the actual transmission rate does not exceed the
in-band rate, otherwise, characters will be dropped
DMD2050 Universal Satellite Modem
Any N from 1 to 24
Any N from 1 to 31
Any N from 1 to 30 as TS 16 is
automatically transmitted
TM110 – Rev. 1.3