peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 198

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

Specific T1/J1 Initialization
The following is a suggestion for a basic initialization to meet most of the T1/J1
requirements. Depending on different applications and requirements any other
initialization can be used.
Table 54
Register
FMR0.XC0/1
FMR0.RC0/1
LIM1.DRS
CCB(3:1)
SIC3.CMI
PCD = 0A
PCR = 15
LIM1.RIL(2:0)
GCR.SCI = 1
LIM2.LOS1 = 1
Data Sheet
= 02
H
H
H
Line Interface Initialization (T1/J1)
Function
The FALC56 supports requirements for the analog line interface
as well as the digital line interface. For the analog line interface the
codes AMI (with and without bit 7stuffing) and B8ZS are
supported. For the digital line interface modes (dual- or single-rail)
the FALC56 supports AMI (with and without bit 7 stuffing), B8ZS
(with and without B8ZS precoding) and NRZ.
LOS detection after 176 consecutive “zeros” (fulfills G.775/
Telcordia (Bellcore)/AT&T)
LOS recovery after 22 “ones” in the PCD interval (fulfills G.775,
Bellcore/AT&T).
LOS threshold of 0.6 V (fulfills G.775).
Additional Recovery Interrupts. Help to meet alarm activation and
deactivation conditions in time.
Automatic pulse-density check on 15 consecutive zeros for LOS
recovery condition (Bellcore requirement)
198
Operational Description T1/J1
FALC56 V1.2
PEB 2256
2002-08-27