S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
5
Application Examples
5.1 Integrated Access Device (IAD)
Multiservice access equipment such as Integrated Access Devices (IADs) and Access
Concentrators consolidate voice, data, Internet, and video wide-area network services over ATM
unifying the functions of many different types of equipment including CSUs, DSUs,
multiplexers and FRADs. Figure 1 illustrates an example of a multiservice access box using
IMA over multiple T1/E1 lines or IMA over G.shdsl for WAN access.
Figure 1 Multiservice Access – IADs and Access Concentrators
PM7328
S/UNI-
ATLAS1k800
T1/E1 x 4
COMET-
Quad
PM73124
T1/E1x4
AAL1gator-4
To PBX, Video
CODEC
PM7340
COMET-
Quad
S/UNI-IMA-4
PM7329
S/UNI-
APEX1k800
Packet
AAL5 SAR
Processor
To Router
SDRAM
Cell FIFO
On the network side, the S/UNI-IMA-4 interfaces seamlessly to standard T1/E1 framers such as
the PM4354 COMET-QUAD T1/E1 Framer Plus LIU and to any device with a clear-channel
clock and data interface. Alternately, the S/UNI-IMA-4 interfaces seamlessly with G.shdsl
Modems via the PCM interfaces to allow multiple DSL links multiplexed into a single higher
bandwidth channel. An external low-cost standard 1Mx16 SDRAM is required to buffer data
for tolerating up to a maximum of 282 msec (T1) / 226 msec (E1) of differential delay across
the serial clock and data links.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
23
PMC [ PMC-SIERRA, INC ]
