Nortel Communication Server 1000 Series Manual page 32

32 Product description
Table 5 "Fiber-optic transmit and receive signal levels" (page 32)
the transmit and receive signal power level at the signal source and the
signal destination. The receive circuit on the electro-optical interface will
detect a signal at a level as low as –30 dBm.
Table 5
Fiber-optic transmit and receive signal levels
Signal source
Fiber Remote
Multi-IPE Interface
Fiber-optic link loss characteristics
The fiber-optic link components add to the total end-to-end link signal
attenuation. The fiber-optic cable attenuation depends on the type of cable
selected. The manufacturer's data sheet provides parameter values, which
must be considered when engineering the link. In addition, the signal
attenuation is also affected by the number of splices in the link and the
signal loss in the link terminating the fiber-optic connectors.
Table 6 "Example of fiber-optic link components and their attenuation
factors" (page 32)
components and the total signal attenuation for a 10 km link of 10.2 dB
for a high quality single-mode fiber.
Table 6
Example of fiber-optic link components and their attenuation factors
Component
High quality
single-mode fiber
(10 km)
Medium quality
splices
ST connector
pairs
Note: XMIT A and RCV A connector pairs on the faceplate do not count when
calculating the attenuation across the link.
Copyright © 2007-2009 Nortel Networks
.
shows an example of different fiber-optic link
Quantity
1
10
4
Nortel Communication Server 1000
Fiber Remote Multi-IPE Interface Fundamentals
NN43021-556 03.01
11 May 2009
Transmitted power
Min
–15 dBm
Attenuation
in (dB)
0.5/km
0.2/splice
0.8/connector pair
shows
Received power
Min
–30 dBm
Total
attenuation
in (dB)
5.0
2.0
3.2