Comtech EF Data CDM-625 - Drop and Insert (D&I)

CDM-625 Advanced Satellite Modem Revision 13
Open Network Operations MN-CDM625
14–3
14.3 Drop and Insert (D&I)
Primary Data Rates Supported
G.703, EIA-422, V.35 and Serial
LVDS
1544 kbps SD, RD, DDO, IDI
2048 kbps SD, RD, DDO, IDI
Satellite Data Rates Supported
(all have 16/15 overhead)
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-CCS)
N = 1, 2, 4, 6, 8, 12, 16, 24, 30 (E1-CAS)
Terrestrial Framing Supported
G.732/G.733, G.704
Satellite Overhead Rate
16/15 of data rate per IESS-308 Rev. 6 and IESS-309 Rev. 3, or
higher
Timeslot Selection Range
1 to 24 (all T1 modes)
1 to 30 (E1-CAS and E1-CCS)
Arbitrary order, non-contiguous available
Plesiochronous Buffer Sizes
Selectable size of 64 to 262,144 bits, in 16-bit steps (with added
limitations for G.704 frame boundaries)
Buffer Clock Reference
Derived from Insert Data In (Insert Clock)
External, RX (satellite) or TX (Terrestrial)
Asynchronous Engineering Service Channel
ESC Data Interface Type
EIA-232, Asynchronous
ESC Data Rate
1/2000 of primary data rate
ESC Data Circuits Supported SD, RD, DSR
Synchronous Engineering Service Channel
ESC Data Interface Type
EIA-232, synchronous to primary data
ESC Data Rate
1/480 of primary data rate
ESC Data Circuits Supported
SD, ST, RD, RT, DSR
Faults and Alarms
Satellite Backward Alarm 1 (per IESS-309)
Receive BWA Output Enabled onto terrestrial secondary alarm