Understanding Codecs And Maximum Channels Supported - Cisco ASR 1000 Configuration Manual
Aggregation services routers sip and spa software
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- Software configuration manual (602 pages) ,
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Chapter 24
Overview of the Cisco DSP SPA for ASR 1000 Series
Understanding Codecs and Maximum Channels Supported
Each SPA-DSP comprises of seven SP2603 DSP chips having a total of 21 DSP cores (3 DSP cores per
SP2603). Based on the complexity of codec (low, medium, high), the density or maximum number of
channels supported per DSP core and maximum channels supported per SPA-DSP are defined.
Following table provides a matrix for maximum channels supported on DSP core and SPA-DSP and the
complexity type:
Table 24-2
Codec Complexity or Service
LC (Low complexity)
Voice/xcode
MC (Medium complexity)
Voice/xcode
HC (High Complexity)
Voice/xcode
ISAC Voice/xcode
Table 24-3
Codec Name
g711alaw
g711ulaw
g722-64
g723r53
g723r63
g726r16
g726r24
g726r32
g726r40
g728
g729abr8
g729ar8
g729br8
g729r8
gsmamr-nb
ilbc
isac
OL-14127-08
Codec -Complexity-and-Density-Supported Matrix
Maximum supported Density per
DSP Core
43
28
17
8
SPA-DSP-Supported Transcoding Codec List
Codec Description
G.711 A Law 64000 bps
G.711 u Law 64000 bps
G722r64
G.723.1 5300 bps
G.723.1 6300 bps
G.726 16000 bps
G.726 24000 bps
G.726 32000 bps
G.726 40000 bps
G.728 codec
G.729ab 8000 bps
G.729a 8000 bps
G.729b 8000 bps
G.729 8000 bps
GSMAMR codec
ILBC codec
ISAC codec
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
Overview of the Cisco DSP SPA
Maximum supported Density per
SPA-DSP
903
588
357
168
24-3
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