pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 69
pef2256e
Manufacturer Part Number
pef2256e
Description
E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF2256E.pdf
(518 pages)
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Figure 19
4.1.9
There are different definitions for detecting Loss-Of-Signal (LOS) alarms in the ITU-T
G.775 and ETS 300233. The FALC
is performed by generating an interrupt (if not masked) and activating a status bit.
Additionally a LOS status change interrupt is programmable by using register GCR.SCI.
•
User’s Manual
Hardware Description
Detection:
An alarm is generated if the incoming data stream has no pulses (no transitions) for
a certain number (N) of consecutive pulse periods. “No pulse” in the digital receive
interface means a logical zero on pins RDIP/RDIN/ROID. A pulse with an amplitude
less than Q dB below nominal is the criteria for “no pulse” in the analog receive
interface (LIM1.DRS = 0). The receive signal level Q is programmable by three
Loss-of-Signal Detection (E1)
Long Haul Protection Switching Application (E1)
®
56 covers all these standards. The LOS indication
69
Functional Description E1
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
56
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