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A.1.3.1
D&I Specifications
Refer to Table A-2 for D&I specifications.
Parameter
Primary Data Circuits Supported
Primary Data Rates Supported
Satellite Data Rates Supported
Terrestrial Framing Supported
Satellite Overhead Rate
Drop Time Slot Selection
(Time Slot 0 not Allowed)
Insert Time Slot Selection
(Time Slot 0 not Allowed)
Interface Type
Terrestrial Input Data Rate
Pulse Width
SD Amplitude
RD Amplitude
Pulse Mask
Line Code
Jitter Attenuation
Transmit Clock Reference
Plesiochronous Buffer
Buffer Clock Reference
A–8
Table A-2. D&I Specifications
T1 DSD, DRD, ISD, IRD
E1 DSD, DRD, ISD, IRD
1544 kbit/s per G.703
2048 kbit/s per G.703
N x 64 kbit/s
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)
G.732/G.733, G.704
1/15 of data rate per IESS-308 Rev. 6 and IESS-309 Rev. 3
1 to 24 (T1)
1 to 31 (E1)
Arbitrary order
1 to 24 (T1)
1 to 31 (E1)
Arbitrary order
Transformer coupled symmetrical pair
T1 1544 kbit/s ± 100 bit/s
E1 2048 kbit/s ± 130 bit/s
T1 324 ± 50 ns
E1 244 ± 25 ns
T1 3.0 +0.3/-1.5 V-pk into 100Ω
E1 3.0 +0.3/-1.5 V-pk into 120Ω
T1 3.0 ± 0.3 V-pk into 100Ω
E1 3.0 ± 0.3 V-pk into 120Ω
T1 G.703.2
E1 G.703. 6
Selectable AMI, B8ZS, HDB3
T1, per AT&T 43802
T1, per CCITT G.824
E1, per CCITT G.823
Normal (derived from drop SD)
Internal (10-5 accuracy)
External (EIA-422 input)
Included in receive path
Derived from insert input
External (EIA-422)
Internal
SDM-300A Satellite Modem
Specification
Rev. 4
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