Premier Mounts CDM-600 사용자 설명서

CDM-600 Satellite Modem 

Revision 7 

Clock Modes and Drop and Insert (D&I) 

MN/CDM600.IOM 

10–9 

The general arrangement for Drop and Insert clocking in the CDM-600 is shown below: 

 

Note that are two inputs and two outputs shown for Drop and Insert Operation. These are: 

• 

Drop Data In (DDI) 

• 

Drop Data Out (DDO) 

 

• 

Insert Data In (IDI) 

• 

Insert Data Out (IDO) 

 

 
This arrangement permits the user to choose between fully independent operation of the 
incoming and outgoing E1/T1 signal, or to use the same T1/E1 signal for both Dropping 
and Inserting (looped mode). If ‘Loop’ has been selected under the Drop and Insert 
configuration menu, the Drop Data Out (DDO) signal is automatically looped internally, 
to become the Insert Data In (IDI). 
 
In this mode, timeslots are dropped from an incoming E1/T1 signal for transmission over 
the satellite, and the same E1/T1 signal has time slots re-inserted into it that will over-
write data in existing timeslots.