PMP Synchronization Solutions User Guide
CMM4 and Controller Board
PMP-0297 007v001 (January, 2017)
3-2
CMM4 and Controller Board
The Cluster Management Module 4 (CMM4) provides power, sync, and network connectivity for
up to eight APs, backhauls, and Ethernet terrestrial feeds in a variety of configurations. The CMM4
provides
•
Sync over Power over Ethernet and integrated surge suppression on the controller board for
up to 8 APs or BHs. Both a custom 30 VDC power scheme and a custom 56 VDC power
scheme are available. Neither is the same as the later IEEE Standard 802.3af, and neither is
compatible with it.
•
Managed switching using a hardened EtherWAN switch (1090CKHH models). The CMM4 ships
with a 14-port EtherWAN switch and is also available without a switch. The CMM4 originally
shipped with a 9-port EtherWAN switch.
•
A weather-tight enclosure with either 4 or 7 glands/ports for Ethernet and power cables (1090
and 1091 models).
•
Surge suppression on the controller board for the incoming 30V DC and 54V DC power lines
and GPS coax cable.
•
Auto-negotiation on the Ethernet ports. Ports will auto-negotiate to match inputs that are
either 100Base-T or 10Base-T, and either full duplex or half duplex, when the connected device
is set to auto-negotiate. Alternatively, these parameters are settable.
•
An always-on NTP (Network Time Protocol) server that can provide date and time to any radio
that can reach the CMM’s management IP address.
shows model numbers and Ethernet switch configurations.
Table 1 CMM4 model numbers and Ethernet switch configurations
CMM4
Model No.
CMM4
Extended
Model
No.
EtherWAN Switch
Cable
glands
(ports)
Total
Ports
10/100
Base-
TX
Ports
10/100/1000
Base-TX
Ports
1090CK
1090CKHH
(current
units)
14
12
2
7
1090CKAA
(earlier
units)
9
8
1
4
1091HH
–
No Switch
7
1092HH
(Rackmount)
–
No Switch
–
