PEF2054 SIEMENS [Siemens Semiconductor Group], PEF2054 Datasheet - Page 20

• Manufacturer Part Number: PEF2054
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

1.7.1.3 Central D-Channel Processing
In this application the EPIC not only switches the B-channels and performs the C/I- and
monitor channel control function, but switches also the D-channel data onto the system
highway. In upstream direction the EPIC can combine up to four 16-kbit/s D-channels
into one 64-kbit/s channel. In downstream direction it provides the capability to distribute
one 64-kbit/s channel to four 16-kbit/s channels.
Figure 7
Digital Line Card Architecture with a Completely Central D-Channel Handling
Semiconductor Group
IOM -2
Interface
R
P
EPIC
B,
D
R
HSCX
20
B
PCM
Highway
Signaling
Highway
Example Frame Structure
B
...
B
D D D D
PEB 2055
PEF 2055
Overview
ITS09535
B