Comtech EF Data SDM-300A - Manual (Page 270)

SDM-300A Satellite Modem Revision 6
Open Network Operations MN/SDM300A.IOM
10–14
10.4.1 D&I Specifications
Table 10-5. D&I Specifications
Parameter Specification
Primary Data Circuits Supported T1 DSD, DRD, ISD, IRD
E1 DSD, DRD, ISD, IRD
Primary Data Rates Supported 1544 kbps per G.703
2048 kbps per G.703
Satellite Data Rates Supported N x 64 kbps
N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, or 24 (T1)
N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30 (E1)
Terrestrial Framing Supported G.732/G.733, G.704
Satellite Overhead Rate 1/15 of data rate per IESS-308 Rev. 6 and IESS-309 Rev. 3
Drop Time Slot Selection
(Time Slot 0 not Allowed) 1 to 24 (T1)
1 to 31 (E1)
Arbitrary order
Insert Time Slot Selection
(Time Slot 0 not Allowed) 1 to 24 (T1)
1 to 31 (E1)
Arbitrary order
Interface Type Transformer coupled symmetrical pair
Terrestrial Input Data Rate T1 1544 kbps ± 100 bps
E1 2048 kbps ± 130 bps
Pulse Width T1 324 ± 50 ns
E1 244 ± 25 ns
SD Amplitude T1 3.0 +0.3/-1.5 V-pk into 100 Ω
E1 3.0 +0.3/-1.5 V-pk into 120 Ω
RD Amplitude T1 3.0 ± 0.3 V-pk into 100Ω
E1 3.0 ± 0.3 V-pk into 120Ω
Pulse Mask T1 G.703.2
E1 G.703. 6
Line Code Selectable AMI, B8ZS, HDB3
Jitter Attenuation T1, per AT&T 43802
T1, per CCITT G.824
E1, per CCITT G.823
Transmit Clock Reference Normal (derived from drop SD)
Internal (10-5 accuracy)
External (EIA-422 input)
Plesiochronous Buffer Included in receive path
Buffer Clock Reference Derived from insert input
External (EIA-422)
Internal