PMP Synchronization Solutions User Guide
CMM Planning
PMP-0297 007v001 (January, 2017)
3-13
When powering PMP 450i AP, ePMP 1000 Connectorized with GPS Sync, or Force 110 PTP
devices with a 56 V powered CMM, a crossover cable must be used, or Cambium dongle
N000045L001A may also be used (these devices require pins 8,7 +Vcc and pins 4, 5 DC return).
Configured for 1000Base-T (Gigabit) Ethernet Terrestrial Feed
IMPORTANT!
The surge suppression provided by the controller board does not
efficiently pass 1000Base-T (Gigabit) Ethernet. Connections required to
support Gigabit Ethernet should not pass through the controller board
portion of the CMM4 and should have separate surge suppression.
shows typical cabling for supporting a Gigabit Ethernet feed. A Gigabit port of the
EtherWAN switch is used for a terrestrial Gigabit Ethernet feed. The surge suppression on the
controller board does not efficiently pass 1000Base-T (Gigabit) Ethernet, so the Gigabit Ethernet
from the EtherWAN switch needs to
•
Be cabled so as not to go through the controller board
•
Have surge suppression provided using a HyperLink Technologies AL-CAT6HPJW surge
suppressor available from L-Com (
) or equivalent.
The AL-CAT6HPJW surge suppressor can be either mounted
•
inside the CMM4 enclosure (using stick-and-rip tape like Velcro or other secure mounting),
with the ground lug on the surge suppressor connected to the ground lug on the inside of the
enclosure with 10 AWG (6 mm
2
) green ground wire.
•
outside the CMM4 enclosure, with the ground lug on the surge suppressor connected to
known-good ground/protective earth with 10 AWG (6 mm
2
) green ground wire.
•
in the case where the CMM4 is located in a telecommunication hut, mounted outside the hut
at the point of cable penetration, with the ground lug on the surge suppressor connected to
known-good ground/protective earth with 10 AWG (6 mm
2
) green ground wire.
