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Product Overview
The Ideal Solution for VoIP-Enabled POTS Line Cards in IP-DSLAMs, MSANs, NGDLCs, and xPON ONUs
Mindspeed’s Comcerto 300 family of VoIP processing devices, in concert with the carrier-grade Media Stream Process-
ing software, delivers a complete, integrated VoIP media, signaling and control processing solution for next-generation
network (NGN) POTS/ISDN line cards focused on Class 5 replacement and IP-PBX applications.
Leveraging a dual-core ARM + DSP processing architecture along with a rich set of interfaces and features, Comcerto
300 devices provide complete low-cost/high-value VoIP media and control processing between narrowband TDM and
Ethernet, allowing inexpensive POTS termination systems to be built on an Ethernet / LAN-based architecture.
Comcerto 300 devices are available with an integrated host controller supporting call control, signaling, (SIP/H.248/
MEGACO/H.323….), and other application-specific functions. Devices are available in seven performance levels to sup-
port from 18 to over 150 G.711/20ms channels including echo cancellation, tone detection, and other POTS-focused
features. The Comcerto family supports channel-level feature “mix and match” capabilities: multiple codecs, ECAN
parameters, and features can be run simultaneously. Devices are also available without the integrated host for applica-
tions using external control and signaling.
Features
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Dual-gigabit Ethernet with serdes (sGMII)
Dual-core ARM11 architecture
Common memory for VoIP and Host S/W
Local TDM clock generation from packet stream
Common footprint and software API across device family
Dual SPI, TDM and Expansion bus for SLIC/SLAC I/O
Flexible boot options: local flash/EPROM/network boot
Runs Mindspeed’s carrier-class VoIP processing S/W
Benefits
Gluelessly supports redundant Ethernet backplanes
Simplifies software through real-time/non-RT separation
Minimizes memory cost and allows software feature growth
Improves fax/modem passthrough performance
Cost scales with performance needs, maximizes design reuse
Simplifies board layout for reduced cost
Supports remote or low-cost SDRAM-only configurations
Robust, mature software with worldwide deployments
The Comcerto 300 family’s architectural advantage is gained through the use of two separate ARM11-based sub-
systems which are coupled through a shared memory subsystem. The Media Stream Processing (MSP) subsystem,
derived from Mindspeed’s flagship Comcerto 900 product, couples one ARM to powerful DSP resources and integrated
memory. This MSP subsystem provides real-time, low-latency voice processing. The Control and Signaling Processing
(CSP) subsystem (on M8235x devices), typically built on a Linux or VxWorks kernel, handles customer applications with
less-stringent real-time requirements such as call control and setup, signaling, and supervisory functions.
Dual independent Gigabit Ethernet interfaces support a rich set of configuration options including sGMII, supporting
direct backplane connectivity for high-availability/high reliability MSAN/IP-DSLAM architectures using “dual-star” Eth-
ernet switch fabrics. Internal boot ROM supports the ability to allocate a unique MAC address to each of the Ethernet
ports on multiple line cards in a multi-line card system, without the need for central controller assignment of MAC
addresses. This facilitates rapid startup with each line card having a predetermined, unique pair of MAC addresses.
Dual SPI, I2C, two UARTs, 32 GPIOs, and an expansion bus connect to a wide array of devices.
Mindspeed provides a variety of tools to evaluate the Comcerto 300 device to accelerate designs to production. The
Comcerto Performance Analyzer, available on Mindspeed’s website, provides customers with the ability to determine
which Comcerto 300 device is appropriate for their application. Various codec/feature mixes and channel densities may
be modeled to determine which devices best suit the target application.
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Product Brief
M823xx
Comcerto® 300 Series Access Voice Processor Family
The Comcerto 300 Evaluation Module (EVM) allows custom-
ers to investigate device capabilities, or to start their own
software development concurrently with their hardware
development. The Comcerto 300 EVM provides all neces-
sary memory, a TSI, four FXS POTS lines, one FXO trunk
line, two 10/100/1000BaseT ethernet interfaces (with SFP
option for optical connectivity), and a T1/E1 interface. The
EVM also includes a System Expansion connector designed
to mate with Zarlink’s family of SLIC/SLAC EVMs, allowing
customers to quickly and easily configure POTS systems
of 8 to 72 ports.
Mindspeed offers a Comcerto 300 design kit which in-
cludes a Silicon Support Package software bundle (SiSP),
18 months of development support and MSP firmware
upgrades via web download, access to Mindspeed’s is-
sue tracking system, Comcerto 300 schematic design
review, and access to Mindspeed’s worldwide Application
Engineering team. Silicon Support Packages (SiSP) are
available for both VxWorks (6.x) and Linux (2.6), and include
a flexible, customizable UBoot based bootloader and the
driver software required for customers to quickly access
the power of the Comcerto 300 platform for their own
CSP-based applications.
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Features List
General
Compact, 484-ball, 1mm pitch,
Hardware Features
Dual ARM1136J processors with
8/16/32 bit local expansion bus
Software/Firmware Features
The Comcerto 300 family runs the
“Comcerto Software for Carrier
Applications” suite. The features
and capabilities of this software
are constantly being enhanced.
For a comprehensive list of these
capabilities, refer to the latest
“Comcerto Software for Carrier
Applications” Features Descrip-
tion document, available on the
Mindspeed website, or contact your
sales representative.
A brief list of features includes
23mm
2
PBGA
-
Leaded and non-leaded ver-
sions available
System footprint, with SDRAM
and Flash, less than 35 cm
2
Downloadable controller firmware
+ DSP code with local and remote
network boot options
VoIP processing from TDM-to-
Ethernet
Unified, remote, real-time
diagnostics via Ethernet
TDM timing from external or
packet source
Process geometry: 90nm
memory management unit
64-bit co-processor assisted
DSP resource pool available in 7
performance levels
DDR1 SDRAM controller, 16 bit
wide, up to 512MB
Two independently configurable
10/100/1000 Ethernet interfaces
-
sGMII/serdes, TBI/serdes,
rGMII, GMII, rMII, MII options
-
Auto-MAC address assignment
via GPIO strapping
Two Serial Peripheral Interfaces
(SPI)
Two UART ports
I2C Interface
for connectivity to NAND/NOR
flash, and other peripherals
External host interface
-
M8235x: 8-bit uP bus (Intel/
Motorola)
-
M8234x: 8/16/32 bit uP bus
(Intel/Motorola) or PCI 2.1,
33MHz
2 software-configurable TDM
interfaces
-
128 timeslot max each
interface, 256 total timeslots.
Timeslots may be ganged for
wideband support. Out-Of-
Band “robbed-bit” signaling
support for T/E framers
Up to 32 GPIOs
1, 2.5, 3.3VDC, 2W Max
over 20 codecs, T.38 Fax
Relay, G.168 Echo Cancellation,
RFC2833, V.150.1 VBD, and more
DDR
SDRAM
DDR
Controller
uP
Bus
Comcerto 300 Family
Shared Memory
Internal Bus
Media Stream
Processor (MSP)
ARM11
S
P
I
2xSPI
MMU
Universal
Expansion Bus
NAND
FLASH
NOR
FLASH/
Boot PROM
Other
Peripherals
ARM11
G
P
I
O
U
A
R
T
U
A
R
T
10/100/
1000
EMAC
10/100/
1000
EMAC
Voice
DSP Resources
T
S
I
2xTDM
EXP
BUS
I
2
C
Board
Components
(Switches, LEDs)
Thermal Sensors,
Peripherals
Console
“
craft
”
Port
10/100
/1000
PHY, NP,
Switch
10/100
/1000
PHY, NP,
Switch
T1/E1 Framer,
HMVIP bus
Comcerto 300 Series Functional Block Diagram
SLICs / SLACs
Control & Signaling
Processor
(CSP)
Comcerto 300 Evaluation Module
For more product information, please visit
www.mindspeed.com.
www.mindspeed.com/salesoffices
General Information: (949) 579-3000
Headquarters – Newport Beach
4000 MacArthur Blvd., East Tower
Newport Beach, CA 92660-3007
823xx-BRF-001-D.pdf
© 2007 Mindspeed Technologies, Inc. All rights reserved. Mindspeed and the Mindspeed logo are
trademarks of Mindspeed Technologies. All other trademarks are the property of their respec-
tive owners. Although Mindspeed Technologies strives for accuracy in all its publications, this
material may contain errors or omissions and is subject to change without notice.
This material is
provided as is and without any express or implied warranties, including merchantability, fitness
for a particular purpose and non-infringement.
Mindspeed Technologies shall not be liable for
any special, indirect, incidental or consequential damages as a result of its use.
Ordering Info:
M8235x includes integrated host
M8234x requires external host
(x=1,2,3,4,6,8, or 9, in increasing
performance levels)
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