m27651 Mindspeed Technologies, m27651 Datasheet

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m27651

Manufacturer Part Number
m27651
Description
Mindcontroller? Oc-12 Atm Shaper
Manufacturer
Mindspeed Technologies
Datasheet
MindController
M 2 7 6 5 1
OC-12 ATM Traffic Shaper
The M27651 provides ATM layer traffic shaping, O p e r a t i o n s,
Ad m i n i s t r a t i o n , and Maintenance (OAM) process i n g ,
header translation, and statistics at OC-12 rates. Up to
64K connections are supported.The M27651 is a part of
the MindController™ family of Application Specifi c
Network Processors (ASNPs) that provide flexible, easy
to upgrade network solutions at competitive prices.
Traffic Shaping
The traffic-shaping function provides two generic cell
rate algorithms (GCRAs) per connection,and conforms
with CBR.1, V B R . 1 , UBR.1 and UBR.2 as defined in the
ATM Forum TM 4.0 specification. Shaping is enabled on
a per-connection basis. Connection rates from 22 cells
per second to line rate are shaped to within one percent
ofthe desired value.
In addition to shaping VCs individually, arbitrary groups of
VCs can also be shaped as a whole. This feature is useful
at VP end-points to shape a collection of VCs using the
traffic parameters ofthe associated VP.
Cells on unshaped connections are sent when nothing
else is scheduled, allowing full use ofthe available line
OC-12 ATM Shaper
rate. Weighted round robin (WRR) access is provided
on these connections to ensure fairness.
OAM Processing
The M27651 supports the fault management (alarm indi-
cation signal (AIS), and remote defect indication (RDI) ),
continuity check, activation/deactivation, and loopback
OAM functions for both path (F4) and channel (F5) levels.
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K EY F E AT U R E S
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OC-12 throughput
ATM Forum TM 4.0-compliant
Shaping rates configurable
from 22 cells per second to
within one percent
Per-connection queuing
traffic shaping supports CBR,
VBR and UBR QoS classes
line rate, with accuracy to
I.610-compliant OAM (F4/F5
alarms, loopback, continuity
check, activation)
with EPD and PPD
Per-buffer class and
per-connection thresholds
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VP (or tunnel) shaping of
channel-switched VCs
Weighted round robin (WRR)
a c c e ss on unshaped co n n e c t i o n s
ATM cell header translation
Per-PHY and per-connection
statistics
Supports 64K connections
Supports UTOPIA Level I/II
ATM cell interfaces
Cell insertion and extraction
via host
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m27651 Summary of contents

Page 1

... OC-12 ATM Traffic Shaper The M27651 provides ATM layer traffic shaping and Maintenance (OAM) process header translation, and statistics at OC-12 rates 64K connections are supported.The M27651 is a part of the MindController™ ...

Page 2

... PPD is optionally applied on AAL5 connections when the buffer limit is reached. Header Translation The M27651 supports the standard 53-byte UNI and NNI cell formats. For channel-switched connections (VCs and VP endpoints), the VPI and VCI fields in the ATM cell header are replaced with new values ...

Page 3

... D S LAMs and wireless base stations. Management Functions Via Host A host processor controls the M27651. The host iss commands via the PCI bus, and receives results back through indications. Commands are available to open, close or modify the following: PHY ports, channels and tunnels ...

Page 4

... I/O voltage levels: 3.3 V • Typical power dissipation: 3.9 W • Package: 474 CBGA • Body size: 32 • Ball pitch: 1.27 mm • ja(ºC/W): 12.6 still air; 9.9 at 200 FPM • Operating temperature: -40ºC to +85ºC • Maximum device junction temperature: 110ºC Ordering Information M27651: M27651-13 ...

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