Cisco Prisma HDRx Reverse Optical Receiver Platform & Power Supply System
2
78-4000618-01 Rev C
Prisma HDRx Chassis Configuration and Monitoring Information,
Continued
Rear View of HDRx
Redundancy
Up to 42 modular optical receivers are housed in the high-density, low-cost HDRx
chassis. The HDRx chassis has the capability to set up redundant pairs of receivers.
Any two receivers in a chassis can potentially make a redundant pair. In order to set
a redundant pair, optics must be applied to both the primary and the backup
(secondary) receivers. The firmware inside the Network Control Module (NCM)
checks to ensure that the receivers in a redundant pair are installed and active before
creating the pair.
Communication and Monitoring HDRx
It is recommended that all field communication with the HDRx be performed using
Transmission Network Control System (TNCS) software on a computer equipped
with an RS-485 card. The computer is connected to the EM interface ports (EM IN
and EM OUT) on the rear of the chassis.
A terminal emulator program such as Hyperterminal can also be used to
A terminal emulator program such as Hyperterminal can also be used to
communicate with the HDRx via the front panel of the NCM using RS-232, but this is
not as user-friendly.