
TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
486
Agere Systems Inc.
21 28-Channel Framer Block Functional Description
(continued)
21.1 28-Channel Framer Introduction
The next two sections describe the switching and transport mode of the superframer. The framer can be configured
into two basic modes: DS0/E0 switching mode and DS1/E1 transport/monitoring mode.
21.1.1 DS0/E0 Switching Applications
The switching application of the Supermapper/superframer is shown in
Figure 53
and
Figure 54
. The system inter-
face is either a parallel interface (e.g., system telecom bus interface) or a serial system interface (e.g., CHI) that
transmits or receives framed (channelized) or unframed (unchannelized) DS0/E0 time slots.
In the transmit line direction (Tx, to the mapper), the framer receives data from the DS0/E0 switch through the sys-
tem interface and sends this data (framed or unframed) to the mapper Section via the internal DS1 cross connect
block. The data consists of data, clock, and frame sync.
In the receive line direction (Rx), the mapper sends the line data and clock (through the internal DS1 cross con-
nect) to the framer block. The framer then takes this data and transmits it to a DS0/E0 switch through the system
interface. Links provisioned for extended superframe format (ESF) can automatically generate and send perfor-
mance message reports (PRMs) from the Rx path performance monitor through a Tx path HDLC channel assigned
to the facility data link in the transmit line path.
5-8924(F)r.1
Figure 53. Switching Application of the Supermapper
FRAMER
MAPPER
PM
FRAMER
MAPPER
PM
FRAMER
MAPPER
PM
FRAMER
MAPPER
PM
FRAMER
MAPPER
PM
FRAMER
MAPPER
PM
SUPERMAPPER #1
SUPERMAPPER #1
SUPERMAPPER #2
SUPERMAPPER #2
SUPERMAPPER #3
SUPERMAPPER #3
MAPPER
TELECOM
BUS
STS-3
SYSTEM
INTERFACE
SYSTEM
INTERFACE
DS0/E0
SWITCH
DS0/E0
SWITCH