Comtech EF Data CDM-500 - Manual (Page 21)

Function CDM-500 Closed Network Satellite Modem
3–2 Rev. 1.3
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.