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| VoIP: Service Providers & Enterprise |
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| Entropia™ II |
Entropia™ II is part of the family of products targeted at
gateways that bridge traditional circuit and cell/packet switched
networks. A single Entropia™ II chip supports up to 336 full-duplex
voice connections with (or without) compression, echo cancellation
(on TDM side), comprehensive tone/announcement processing
and telephony features as well as complete AAL1, AAL2, and
IP support.
The main function of Entropia™ II is to provide format conversion
and switching between individual voice streams, flowing across
packetized voice and conventional circuit switched voice highways.
Each voice channel from the TDM side is echo canceled, compressed,
and packetized for transmission over the packet network. In
the reverse direction, each packetized voice channel from
the packet network is buffered for de-jittering, decompressed,
and terminated at the TDM interface. The Entropia™ II interfaces
to the circuit switched networks through a standard-compliant
TDM interface and to the packet network through a UTOPIA level-2
interface for cells or a POS-PHY interface for variable size
packets.
The Entropia™ II supports layer 2/3 control plane traffic
transport over the packet network (for example, CAS signaling
for voice over AAL2). Control plane messages received from
the packet network are split and routed to the host processor,
while user plane traffic is scheduled for voice processing
and then routed to the TDM highway. Voice traffic from the
TDM highway is merged with control plane traffic from the
host processor for transmission to the packet network. Additionally,
a single Entropia™ II supports 4:1/8:1 over-subscription on
the ATM (AAL2) interface, where type 3 and refresh messages
from up to 4x336/8x336 channels are transported to-and-from
the host processor to enable call setup and tear-down functions.
| FEATURES |
BENEFITS |
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| High-density and
high-integration voice/data convergence product
that bridges circuit and packet switched networks |
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- Up to 336 voice channels per chip
- Cascadable to OC3 capacity and beyond
- Fully compliant to ITU-T and ATM forum standards
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| Performs all of voice processing,
telephony, and networking functions in one chip |
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| Low power dissipation, 3.3 Watts |
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| Voice compression
with echo cancellation |
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- Up to 336 channels of PCM with ATM AAL1
- Up to 336 channels of PCM/ADPCM with IP and
ATM AAL2
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- Provisionable from 8 to 128 ms of echo cancellation
- Meets G.165 and G.168 ITU-T standards
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- Voice activity detection (VAD)
- Silence insertion descriptor (SID) support
- Comfort noise generation (CNG)
- Per channel A-law and µ-law support
and conversion
- Automatic detection of fax/data modem calls
and revert to 64 kbps PCM
- Comprehensive tone detection and processing
for national and international standards
- Message Announcement support
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- Complete user plane AAL1/2/5 and IP support
- Independent POS-PHY and UTOPIA interfaces
- Support for control plane traffic transport
(AAL2 type 3 messages, OAM cells, TCP, RTCP,
etc.)
- Split and merge of AAL1/2 control and management
traffic with user plane traffic
- 4:1 over-subscription support on the packet
interface
- Support for SSSAR and SSTED
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| Vocoder and feature selection
on a per-call and per-channel basis |
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| Host API provides easy system
integration |
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| Extensive management and performance
monitoring |
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| Support for in-operation and
standby system diagnostics including self tests |
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| Intelligent on-chip power management |
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