Comtech EF Data CDM-625 - Manual (Page 396)

CDM-625 Advanced Satellite Modem Revision 15
Ethernet Network Configuration MN-CDM625
16–18
Accordingly, the third segment between the CDM-625 ‘B’ (distant-end modem) LAN
port and the BTS defines the distant-end modem’s LAN port as the master and the BTS
as the slave.
As configured here, each modem has established independent Wireless Receiver/Transmitter
(WRT) protocol segments – one for LAN and other one for WAN. This defines the boundary clock
time distribution configuration, where the slave to one interface provides a master clock to the
other interfaces.