Premier Mounts CDM-600 사용자 설명서

CDM-600 Satellite Modem 

Revision 7 

Open Network Operations 

MN/CDM600.IOM 

9–2  

Performs clock and data recovery on the G.703 format. Clock de-jitter and data 
encoding/decoding is done as with the IDR configuration. 

Multiplexes/demultiplexes the primary data in compliance with the standard IESS-309 
overhead ratio of 1/15 (4 overhead bytes per 60 data bytes) and provides the rate 
exchanged transmit clock to the modulator portion of the base modem. 

Bi-directional processing of the components of the ESC channel, including the ASYNC 
or SYNC EIA-232 data channel, and fault/alarm indications.  

For units with FW version 1.3.1 or greater a second high-rate ESC channel, at up to 1/20

th

 

of the primary data rate, is available, using async EIA-232 format. 

Provides the synchronous scrambling/descrambling of the satellite-framed data specified 
in IESS-309. Base modem scrambling/descrambling is disabled in this mode. 

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)