Comtech EF Data SDM-300A - Manual (Page 271)

SDM-300A Satellite Modem Revision 6
Open Network Operations MN/SDM300A.IOM
10–15
Table 10-5. D&I Specifications (Continued)
Parameter Specification
Buffer Depth
T1, T1_ESF, E1_CCS,
1, 2, 4, 8, 16, or 32 ms
E1_31_TS
E1_CAS
7.5, 15, or 30 ms
Depth Status Monitored accurate to 1%
Buffer Centering Automatic (start of service), manual
Overflows/Underflows Logged as stored fault
Engineering Service Channel
ESC Data Interface Type
EIA-232
ESC Data Rate
(Maximum Asynchronous) 1/2000 of satellite data rate, maximum (over sampled)
ESC Data Circuits
Supported
SD, RD, DSR
Faults and Alarms
Backward Alarms
Supported
1 (looped per IESS-309)
Backward Alarm Output Sums into secondary alarm
Modulator Fault Open collector, 15V maximum, 20 mA maximum, used by protection switch, if in
system
Demodulator Fault Open collector, 15V maximum, 20 mA maximum, used by protection switch, if in
system