Nortel Networks Passport 241-5101-200 - Manual (Page 17)

Chapter 1 Passport 8250 17
Passport 8250 Installation Guide R2.2
See “Passport 8250 front panel” (page 17) for an illustration of the hardware
components.
Figure 2
Passport 8250 front panel
Board modules
The Passport 8250 device has a field-replaceable network board and up to
three field-replaceable DS-1/E1 service boards.
Network board
The network board is a single-mode or multi-mode integrated dual trunk. The
network board controls the Passport 8250 device and contains the
communication ports.
DS-1 and E1 service boards
The Passport 8250 device can hold one, two, or three DS-1 or E1 service
boards. Service boards send and receive DS-1/E1 signals and convert between
ATM cells and DS-1/E1 traffic. Each service board has 16 physical DS-1/E1
ports.
Ethernet
port
Serial
port
DS-1/E1 ports
Fan
module
Network board
Service board 3
Service board 2
Service board 1
ATM uplink port
Dual power supply modules