PEF20550HV21XT Lantiq, PEF20550HV21XT Datasheet - Page 40

• Manufacturer Part Number: PEF20550HV21XT
• Manufacturer: Lantiq

Specifications of PEF20550HV21XT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

1.6.4.2 DECT Line Card Design for an Existing PBX
Today most of the PBX´s have a modular design, meaning they can be extended by
adding an analog or digital line card. This enables a user to integrate a DECT system
into his PBX by simply inserting a DECT line card that behaves like a digital line card.
To communicate over the existing PCM highway, a PCM4 to PCM converter must be
integrated onto the line card.
Compared to a digital line card a DECT line card requires additional efforts to
synchronize all line cards.
v
Figure 22
Line Card Architecture for DECT Subscribers
The tasks of the ELIC are:
• 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
• Signaling control to the group processor
Semiconductor Group
1
Base Stations
2
3
U
PN
4
OCTAT -P
40
R
IOM -2
PCM
R
SYNC
HDLC
C µ
D
ADPCM
ELIC
PCM
HDLC
R
2 Mbit/s
DECT Line Card
QUAD
ADPCM
QUAD
ADPCM
DSP
ITS07315
PEB 20550
PEF 20550
Overview
Signaling
Highway
PCM
Highway
01.96