Chapter 2: System hardware
GPS synchronization
Page
2-62
CMM3/CMMmicro
The CMM3 or CMMmicro (Cluster Management Module micro) provides power, GPS timing, and
networking connections for an AP cluster. The CMM3 is configurable through a web interface.
The CMM3 contains an 8-port managed switch that supports Power over Ethernet (PoE – this is
Cambium PoE, not the standard PoE) on each port and connects any combination of APs, BHMs, BHSs,
or Ethernet feed. The Cambium fixed wireless broadband IP networks PoE differs from IEEE Standard
803.3af PoE, and the two should not be intermixed. The CMM3 can auto-negotiate speed to match
inputs that are either 100Base-TX or 10Base-T, and either full duplex or half duplex, where the
connected device is set to auto-negotiate. Alternatively, these parameters are settable.
A CMM3 requires only one cable, terminating in an RJ-45 connector, for each connected module to
distribute
•
Ethernet signaling.
•
power to as many as 8 co-located modules—APs, BHMs, or BHSs. Through a browser interface to
the managed switch, ports can be powered or not.
•
sync to APs and BHMs. The CMM3 receives 1-pulse per second timing information from Global
Positioning System (GPS) satellites through an antenna (included) and passes the timing pulse
embedded in the 24-V power to the connected modules.
GPS status information is available at the CMM3, however
•
CMM3 provides time and date information to BHMs and APs if both the CMMmicro is operating on
CMMmicro Release 2.1 or later and the AP/BHM is operating on System Release 4.2 or later. See
Configuring Time Settings in Configuration Guide for more details.
•
CMM3
does not
provide time and date information to BHMs and APs if either the CMM3 is operating
on a release earlier than CMMmicro Release 2.1 or the AP/BHM is operating on a release earlier than
System Release 4.2.
A CMM3/CMMicro is shown in
Содержание PMP 450 AP
Страница 79: ...Chapter 2 System hardware System Components Page 2 29 Figure 20 Gigabit Enet Capable power supply...
Страница 160: ...Chapter 3 System planning Radio Frequency planning Page 3 30 Figure 55 Sector Antenna...
Страница 161: ...Chapter 3 System planning Radio Frequency planning Page 3 31 Figure 56 cnMedusa Antenna...
Страница 189: ...Chapter 3 System planning Remote AP Deployment Page 3 59 Figure 65 Remote AP wired to SM that serves as a relay...