peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 65

• Manufacturer Part Number: peb2256
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

Figure 16
4.1.8
There are different definitions for detecting Loss-Of-Signal (LOS) alarms in the ITU-T
G.775 and ETS 300233. The FALC56 covers all these standards. The LOS indication 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.
• Detection:
Data Sheet
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 control
Receive Line
E1/T1/J1
E1/T1/J1
Transmit
Line
Loss-of-Signal Detection (E1)
Protection Switching Application
65
XL1
XL2
RL1
RL2
XL1
XL2
RL1
RL2
(stand by)
(active)
FALC
FALC
TRIST
TRIST
Functional Description E1
®
®
RDO
RDO
XDI
XDI
1
FALC56 V1.2
PEB 2256
F0075
2002-08-27