PMP Synchronization Solutions User Guide
CMM4 and Controller Board
PMP-0297 007v001 (January, 2017)
3-3
Inside the CMM4 enclosure is a controller board, an EtherWAN switch (model 1090CKHH only),
and a GPS coax surge suppressor.
The controller board injects power and synchronization on up to eight Ethernet ports and provides
the equivalent of 600SS surge suppression on each of the eight ports. The controller board is
managed using a web browser, Telnet, or SNMP, and is supported by the Prizm Element
Management System (EMS). The controller board receives 30 VDC power and/or 54 VDC from
external power supplies, and provides 20 VDC power for the EtherWAN switch and other auxiliary
equipment. The controller board includes a GPS module, which provides sync and GPS
information to the CMM, a management port, an override toggle switch, and an auxiliary sync
port for connecting to another CMM.
IMPORTANT
!
The controller board does not convert 30 VDC to 56 VDC or 56 VDC to 30
VDC. To power 56 VDC equipment from a CMM4 you must provide a 54
VDC power supply, and to power 30 VDC equipment from a CMM4 you
must provide a 30 VDC power supply.
The hardened, managed EtherWAN switch (model 1090CKHHonly) provides a full array of
networking features. For details on the EtherWAN switch, see page
Figure 24 CMM4 internal view, including cable glands
Weatherized enclosure
N-type coax connector
for GPS antenna
EtherWAN 14-port
hardened managed
switch
Gigabit Ethernet ports
8 Ethernet ports
supporting Sync over
Power over Ethernet
and providing surge
suppression
Cable Glands
Patch cables between
EtherWAN switch and
controller board
Controller board
Patch cable between
controller board
management port and
EtherWAN Switch
