PEF20550HV21XT Lantiq, PEF20550HV21XT Datasheet - Page 39

• Manufacturer Part Number: PEF20550HV21XT
• Manufacturer: Lantiq

Specifications of PEF20550HV21XT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

PEB 20550
PEF 20550
Overview
In this configuration the base stations are connected to the line interface of the CCFP via
U
(OCTAT-P). The 4 bit ADPCM voice channels provided by the base stations are
PN
switched (by the ELIC) to the PCM - ADPCM converter (QUAD ADPCM), expanded to
an 8 bit ADPCM value and then switched (by the ELIC) to the analog trunk interface
(SICOFI-4 + SLIC).
The additional DSPs are necessary, to compensate short end echoes occurring at
analog nodes
The line card controller ELIC (PEB 20550) fulfills four major tasks:
• Layer-1 monitoring and controlling via IOM-2 C/I and MONITOR channel
• Signaling control (HDLC controller multiplexed to the subscribers)
• 4 bit switching of the PCM4 channels
• 8 bit switching of the PCM channels
Semiconductor Group
39
01.96