Comtech EF Data CDM-500 Installation And Operation Manual page 21

Function
Following this, the data passes to the Plesiochronous/Doppler buffer, which has a
programmable size, or may be bypassed. From here, the receive clock and data signals
are routed to the terrestrial interface, and are passed to the externally connected DTE
equipment.
3–2
CDM-500 Closed Network Satellite Modem
Rev. 1.3