PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
5
APPLICATION EXAMPLES
5.1 Multi-Service Access – IADs, Access Concentrators
Multi-Service 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 multi-service access box using IMA over multiple T1/E1 lines for
WAN access.
Figure 1
- Multi-Service Access – IADs and Access Concentrators.
AAL1
UTOPIA L2 /
UTOPIA L2
Any-PHY
PM73124
AAL1gator-4
AAL2
PM7326
PM73140
MECA-4A
S/UNI-APEX
Clock/Data
PM4354
COMET-
QUAD x 2
PM7340
S/UNI-IMA-8
Frame Relay over AAL5
PM7324
S/UNI-ATLAS
PM7366
FREEDM-8
IWF/AAL5
SAR
On the lineside, the S/UNI-IMA-8 interfaces seamlessly to standard devices such
as the PM4354 COMET-QUAD T1/E1 Framer plus LIU.
5.2 Remote DSLAM WAN Uplink
IMA is ideally suited for remote DSLAM applications for several reasons. Firstly,
remote DSLAMs are physically located at remote sites of which many are served
by T1 or E1 lines. Secondly, the benefits of ATM have resulted in its almost
exclusive use in DSLAMs. Coupled with ATM, DSLAMs enable service providers
to utilize the bandwidth of the T1/E1 infrastructure for delivering integrated
services such as high-speed Internet access and real-time voice and video. ATM
over T1/E1 is a suitable DSLAM WAN uplink technology and IMA, due to its
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
10
PMC [ PMC-SIERRA, INC ]
