P300H P300 Series Modem Installation and Operating Handbook Page 197
ALPHABETIC FEATURE LIST
Included as standard
Feature
P300
VSAT
P300
IBS
P300
IDR
P300
TCM
Letter
Description of Feature
P300
User
Base
Modem
A
Tx path: without this the modem can be Rx only
B
Rx path: without this the modem can be Tx only
P
Variable rate:
Variable
data rate if enabled (see `R`),
fixed
if not (See `Q`)
S
70MHz IF interface: IF frequencies in the range 50 - 90MHz
(Provides 50-180MHz if feature `T` also)
U
100Hz IF synth steps: 2.5KHz if not enabled
V
Misc ASIC functions: Terrestrial CRC support & BER monitoring
Viterbi FEC
N
*
Viterbi FEC (to IESS 308/309), rate 1/2, 3/4, 7/8 in BPSK, QPSK and OQPSK.
Sequential
FEC
M
*
Sequential FEC (to IESS 312) , rate 1/2, 3/4, 7/8 in BPSK, QPSK, OQPSK
INTELSAT
Reed-
Solomon
L
Reed-Solomon outer FEC (to IESS 308/310), with n, k, t = 126, 112, 7
(Switches to 225, 205, 10 or 219, 201, 9 with 4/8 deep interleaving as required for IDR &
TCM/IDR if options are available)
Wideband
IF
T
140MHz IF interface: IF frequencies in the range 100 - 180 MHz
(Provides 50-180MHz if feature S also available)
High Data
rates
R
If data rate is
Variable
by feature `P`, then data rate range is 4.8kbps to 5.0Mbps if this feature
enabled otherwise limited to rates between
Low_Rate
and
High_Rate
(see bottom of table).
No effect if feature `P` disables variable rate
Async ESC
G
Variable rate ESC channel for Closed Net plus ESC operation
High rate IBS/SMS ESC (with IBS/SMS feature)
Async ESC access to IDR 8k sync ESC channel (with IDR option).
IBS/SMS
E
IBS/SMS framing (to IESS 309) with low rate INTELSAT ESC (to IESS 403).
Drop/Insert
C
Normal T1/E1 linear order Drop/Insert, excludes `Odd values of N` such as N=7, 9 etc (see
feature D)
IDR
F
*
IDR operation (to IESS 308): Two audio ESC channels Sync 8kbps ESC; Four form `C`
backward alarms.
H
Aux: IBS variable rate synchronous Aux channel, IDR 32/64kbps in place of one/both audio
ADPCM ESC channels
J
P1348 emulation: Emulation of P1348 / P1448 cards popular in SNG applications. Includes
generation of 64kbps carrier from 2 x 32k ADPCM audio (using IDR Audio ESC ports), or
128kbps from 2 x Audio + 64kbps data.
PRBS
Tester
K
PRBS tester: Internal BERT (can run through Main, ESC and Aux channels in any o/h modes)
8PSK/TCM
O
8PSK with
rate Trellis Code Modulation (TCM, to IESS 310).
Extended
D/I
D
Arbitrary Timeslot re-ordering on Tx & Rx paths. Timeslot ID maintenance for the `Odd values
of N` giving N=1 to 31 with IBS/SMS or Closed Net plus ESC operation. E1 CAS & T1 RBS
signalling support. Rx Partial Insert (for multi-destinational working)
Custom
Features
I
Arbitrary `n` & `k` when using Reed-Solomon, Custom and Minimum Overhead framing modes,
Custom allocation of IBS o/h between Async ESC & Sync Aux ports.
Dual Rate
Q
Dual rate: If data rate is
fixed
by feature `P`, then fixed at
Low_Rate
unless this feature
enabled when choice of
Low_Rate
or
High_Rate
is available (see below). No effect if feature
`P` enables Variable rate
