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CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
LOCAL END
ETHERNET
A
O
2048 or
1544 KHz
G.703 input (T1/E1)
CDM-625
CDM-570/570L
from high stability
network source
Tx timing mode:
Internal clock, locked to
external G.703
Rx:
Buffer disabled
CLK
Demod
DATA
(HDLC)
DATA
Mod
CLK
Notes:
Any desired
1) The IP interface can be set to
data rate
any desired data rate, with 1 bps
resolution
Clock
Synth
Core
2) Tx and Rx rates can be
asymmetrical
Figure 9-9. G.703 Clock Extension Mode 3
Rx clock at desired link data rate
Timing mode:
Rx buffer disabled
END RESULT:
The G.703 signal at
at
, regardless of the exact link data rate
B
9–14
MN-0000036 (Ref MN/CDM625.IOM)
DISTANT END
Mod
ETHERNET
(HDLC)
RD
Demod
RT
Clock
Synth
Core
2048 or
1544 KHz
G.703 output (T1/E1)
CDM-625
(all ones pattern)
CDM-570/570L
A
is perfectly reproduced
Revision 1
B
O
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