Comtech EF Data MIDAS Version 4.X NMS Configuration User Manual
Page 88
MIDAS 4.X NMS Configuration, Rev.6
2–60
Setup and Operation
F
F
r
r
o
o
m
m
/
/
A
A
Set up these parameters for the origination (From/A) side of the Predefined
circuit. These parameters consist of the Node number, Channel number, and
Modem type.
Note: If activation type is RTS and CiM modems are used, the From/A
side will have to configure the RTS Teardown Delay.
R
R
T
T
S
S
T
T
e
e
a
a
r
r
d
d
o
o
w
w
n
n
D
D
e
e
l
l
a
a
y
y
The Tear Down Time Out field is displayed in the Communications Setting
window ONLY when a Comtech IP Modem (CiM) is selected. This field is
provided to keep a circuit from being inactivated prematurely due to the bursty
nature of the IP traffic. It is used only for RTS circuits to define how long after
the last packet was routed that a circuit connection should remain active. Valid
entries include any number of seconds from 1 to 65,535 (more than 18 hours).
Note: These two fields do not display simultaneously as each is specific to
a modem type.
P
P
o
o
w
w
e
e
r
r
Enter the power level for the traffic modem.
C
C
l
l
o
o
c
c
k
k
M
M
o
o
d
d
e
e
Use this drop-down list to select the clock mode for the traffic modem:
Terrestrial, Internal, Satellite, or Ext Ref (External Reference).
M
M
o
o
d
d
u
u
l
l
a
a
t
t
i
i
o
o
n
n
Use this drop-down list to select the modulation type for the traffic modem,
either BPSK, QPSK, OQPSK, 8PSK, or QAM16.
F
F
E
E
C
C
R
R
a
a
t
t
e
e
Use this drop-down list to select the Forward Error Correction (FEC) rate for
the traffic modem, either 1/2, 3/4, 2/3, 7/8, 5/16, 21/44, 8/9, or 1/1.
D
D
a
a
t
t
a
a
R
R
a
a
t
t
e
e
Select a valid data rate for the traffic modem.
R
R
e
e
e
e
d
d
-
-
S
S
o
o
l
l
o
o
m
m
o
o
n
n
Use this control for enabling or disabling the Reed-Solomon function.
E
E
n
n
c
c
o
o
d
d
i
i
n
n
g
g
Select the Encoding type, Viterbi, Sequential, Turbo, TCM, or Uncoded.
D
D
o
o
p
p
p
p
l
l
e
e
r
r
B
B
u
u
f
f
f
f
e
e
r
r
Enter the Doppler Buffer size, in bits, to compensate for satellite movement.
The depth of the receive buffer will depend upon four parameters: