Cisco Mc3810 - 16MB Flash Memory Quick guide

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Cisco IOS Release 12.1(2)T
Configuring Cisco MC3810 Series Concentrators
to Use High-Performance Compression Modules
This document describes feature changes introduced in Cisco IOS Release 12.0(7)XK and supported in
Cisco IOS Release 12.1(2)T and later for Cisco MC3810 series concentrators that contain
high-performance voice compression modules (HCMs).
This document includes the following sections:
•“Feature Overview” on page 1
•“Supported Platforms” on page 2
•“Supported Standards, MIBs, and RFCs” on page 3
•“Prerequisites” on page 3
•“Configuration Tasks” on page 3
•“Command Reference” on page 7
Feature Overview
High-performance voice compression modules (HCMs) provide voice compression according to the
voice compression coding algorithm (codec) specified when the Cisco MC3810 is configured. Table 1
shows the number of voice channels each type of compression module can support.
Table 1 Voice Compression Module Application Information
Type Codec Packaging Complexity (see Table 2)
Voice Channels
per HCM
HCM2 High complexity (codec complexity set to high)4
Medium complexity (codec complexity set to medium)8
HCM6 High complexity (codec complexity set to high)12
Medium complexity (codec complexity set to medium)24

Configuring Cisco MC3810 Series Concentrators to Use High-Performance Compression Modules
Supported Platforms
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Benefits
HCMs support more voice channels than the earlier voice compression modules (VCMs) used in the
Cisco MC3810 series.
Restrictions
The following restrictions apply to HCMs:
•HCMs should not be combined with VCMs in a Cisco MC3810 chassis.
•HCMs require Cisco IOS Release 12.0(7)XK or 12.1(2)T or later.
Related Features and Technologies
Voice over Internet Protocol (VoIP)
Voice over Frame Relay (VoFR)
Voice over Asynchronous Transfer Mode (VoATM)
Related Documents
•Cisco IOS Multiservice Applications Configuration Guide, Cisco IOS Release 12.1
•Cisco IOS Multiservice Applications Command Reference, Cisco IOS Release 12.1
Supported Platforms
•Cisco MC3810 series
Table 2 Codec Packaging Information
Codec Packaging Codecs
High complexity G.711ulaw, G.711alaw
G.723.1(r5.3), G.723.1 Annex A(r5.3), G.723.1(r6.3), G.723.1 Annex A(r6.3)
G.726(r16), G.726(r24), G.726(r32)
G.728
G.729, G.729 Annex B
fax relay
Medium complexity G.711ulaw, G.711alaw
G.726(r16), G.726(r24), G.726(r32)
G.729 Annex A, G.729 Annex B with Annex A
fax relay

Configuring Cisco MC3810 Series Concentrators to Use High-Performance Compression Modules
Supported Standards, MIBs, and RFCs
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Cisco IOS Release 12.1(2)T
Supported Standards, MIBs, and RFCs
RFCs
•RFC 1890— RTP: A Transport Protocol for Real-Time Applications
•RFC 1889—RTP Profile for Audio and Video Conferences with Minimal Control
MIBs
•CISCO-ENTITY-VENDORTYPE-OID-MIB
•OLD-CISCO-CHASSIS-MIB
•CAS_INTF_MIB
International Telecommunication Union (ITU-T) G-Series Codec Compression Specifications
– G.711 A Law at 64,000 bps
– G.711 u Law at 64,000 bps
– G.723.1 Annex A at 5300 bps
– G.723.1 Annex A at 6300 bps
– G.723.1 at 5300 bps
– G.723.1 at 6300 bps
– G.726 at 16,000 bps
– G.726 at 24,000 bps
– G.726 at 32,000 bps
– G.728 at 16,000 bps
– G.729 at 8000 bps
– G.729 Annex A and B at 8000 bps
– G.729 Annex A at 8000 bps
– G.729 Annex B at 8000 bps
Prerequisites
One or two HCM modules must be installed in your Cisco MC3810 chassis.
Note An HCM may not be combined with a VCM in one chassis.
Configuration Tasks
Complete the following tasks to configure the Cisco MC3810 voice ports for operation with one or two
HCMs installed:
•Configuring Codec Complexity
•Specifying Codecs for Network Dial Peers

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Configuration Tasks
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Cisco IOS Release 12.1(2)T
Configuring Codec Complexity
To configure codec complexity for voice ports, enter the following commands, beginning in privileged
EXEC mode. Commands apply to both analog and digital voice ports unless otherwise indicated. You
enter the codec complexity command in voice-card configuration mode. On the Cisco MC3810 series,
voice-card 0 is used as a virtual voice-card, and the setting applies to all voice ports on a Cisco MC3810.
This procedure does not cover other voice-port configuration commands that may be required. To learn
more, see the Cisco IOS Multiservice Applications Configuration Guide and the Cisco IOS Multiservice
Applications Command Reference for Cisco IOS Release 12.1.
Verifying Codec Complexity Settings
To verify the codec complexity configuration, enter the show running-config command to display the
current voice-card setting. If medium complexity is specified, the codec complexity setting is not
displayed. If high complexity is specified, the setting codec complexity high is displayed. The
following example shows an excerpt from the command output if high complexity has been specified:
Router# show running-config
.
.
.
hostname router-alpha
voice-card 0
codec complexity high
.
.
Command Purpose
Step 1 router# show voice dsp Check the DSP voice channel activity. If any DSP voice channels are in the
busy state, you cannot change the codec complexity.
When all of the DSP channels are in the idle state, continue to step 2.
Step 2 router# configure terminal Enter global configuration mode.
Step 3 router(config)# voice-card 0 Enter voice-card configuration mode and specify voice card 0. Voice card 0
provides the configuration mode for setting the codec complexity on a
Cisco MC3810.
Step 4 router(config-voicecard)# codec
complexity {high | medium}Specify the codec complexity for this Cisco MC3810 according to the
bandwidth requirements and the number of voice channels to be supported
per DSP. The default is medium complexity, which provides four voice
channels per DSP.
See the “codec complexity” section on page 11 in the Command Reference
for information about the codec complexity command.
Step 5 router(config-voicecard)# exit Exit from voice-card configuration mode.

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Configuration Tasks
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Specifying Codecs for Network Dial Peers
Follow these steps to specify a codec for each network dial peer according to the codec complexity
setting selected for this Cisco MC3810. If you do not set codec complexity and specify a codec, the
defaults remain in effect: medium complexity and G.729, 8000 bps.
This does not cover the complete dial-peer configuration procedure. To learn more, see the Cisco IOS
Multiservice Applications Configuration Guide and the Cisco IOS Multiservice Applications Command
Reference for Cisco IOS Release 12.1.
Verifying Network Dial Peers
Follow the procedure below to verify dial-peer configuration. To learn more about these commands, see
the Cisco IOS Multiservice Applications Configuration Guide and the Cisco IOS Multiservice
Applications Command Reference for Cisco IOS Release 12.1.
Enter the privileged EXEC show dial-peer voice command. The following text is sample output from
the show dial-peer voice command for a VoIP dial peer:
Router# show dial-peer voice 10
VoiceOverIpPeer10
information type = voice,
tag = 10, destination-pattern = `555....',
answer-address = `', preference=0,
group = 10, Admin state is up, Operation state is up,
incoming called-number = `', connections/maximum = 0/unlimited,
DTMF Relay = disabled,
application associated:
type = voip, session-target = `ipv4:10.1.1.1',
Command Purpose
Step 1 Router# configure terminal Enter global configuration mode.
Step 2 Router(config)# dial-peer voice tag {voip |vofr |
voatm}Enter dial-peer configuration mode and specify a
network dial peer for which to specify a codec.
tag is one or more digits to identify the dial peer. Valid
entries are 1 to 2147483647.
Step 3 Router(config-dial-peer)# codec codec [bytes
payload-size]Specify a codec for the dial peer. Codec types are as
follows:
g711alaw, g711ulaw,
g723ar53, g723ar63, g723r53, g723r63,
g726r16, g726r24, g726r32,
g728,
g729abr8, g729ar8, g729br8, g729r8
The default is g729r8.
Optionally specify the voice payload (in bytes) of each
frame.
For information about the options available for the
codec command, see the command reference section or
enter ?.
Step 4 Router(config-dial-peer)# exit Exit from dial-peer configuration mode.

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Configuration Tasks
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technology prefix:
ip precedence = 0, UDP checksum = disabled,
session-protocol = cisco, req-qos = best-effort,
acc-qos = best-effort,
fax-rate = voice, payload size = 20 bytes
codec = g711alaw, payload size = 160 bytes,
Expect factor = 10, Icpif = 30,signaling-type = cas,
VAD = enabled, Poor QOV Trap = disabled,
voice class perm tag = `'
Connect Time = 0, Charged Units = 0,
Successful Calls = 0, Failed Calls = 0,
Accepted Calls = 0, Refused Calls = 0,
Last Disconnect Cause is "",
Last Disconnect Text is "",
Last Setup Time = 0.
The following text is sample output from the show dial-peer voice command for a VoFR dial peer:
Router# show dial-peer voice 20
VoiceOverFRPeer20
information type = voice,
tag = 20, destination-pattern = `555....',
answer-address = `', preference=0,
group = 20, Admin state is up, Operation state is up,
incoming called-number = `', connections/maximum = 0/unlimited,
DTMF Relay = disabled,
application associated:
type = vofr, session-target = `Serial0 120',
called number = `',
session-protocol = cisco-switched,
fax-rate = voice, payload size = 30 bytes
codec = g729r8, payload size = 30 bytes,
signaling-type = cas,
VAD = enabled,
Voice Sequence Numbers = disabled,
voice class perm tag = `'
Connect Time = 0, Charged Units = 0,
Successful Calls = 0, Failed Calls = 0,
Accepted Calls = 0, Refused Calls = 0,
Last Disconnect Cause is "",
Last Disconnect Text is "",
Last Setup Time = 0.
The following text is sample output from the show dial-peer voice command for a VoATM dial peer:
Router# show dial-peer voice 1
VoiceOverATMPeer1
information type = voice,
tag = 1, destination-pattern = `555....',
answer-address = `', preference=5,
group = 1, Admin state is up, Operation state is up,
incoming called-number = `', connections/maximum = 0/unlimited,
DTMF Relay = disabled,
application associated:
type = voatm, session-target = `ATM0 pvc 101/1001',
session-protocol = cisco-switched,
fax-rate = voice, payload size = 30 bytes
codec = g729r8, payload size = 30 bytes,
signaling-type = cas,
VAD = enabled,
Voice Sequence Numbers = disabled,
voice class perm tag = `'
Connect Time = 0, Charged Units = 0,
Successful Calls = 0, Failed Calls = 0,

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Command Reference
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Accepted Calls = 0, Refused Calls = 0,
Last Disconnect Cause is "",
Last Disconnect Text is "",
Last Setup Time = 0.
Command Reference
This section documents new or modified commands. Modified commands are indicated by an
asterisk (*). All other commands used with this feature are documented in the Cisco IOS Release 12.1
command reference publications.
•codec (dial-peer)*
•codec complexity*
•ds0-group*
•voice-card*

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codec (dial-peer)
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codec (dial-peer)
To specify the voice codec for a network dial peer, enter the codec dial-peer configuration command.
Use the no form of this command to restore the default value.
codec codec [bytes payload-size]
no codec
Syntax Description
Defaults If no codec is specified, dial peers are configured for g729r8 and the voice payload is as shown in Table 3
for G.729r8.
If a codec is specified without the bytes keyword, the voice payload is as shown in Table 3.
Command Modes Dial-peer configuration
codec Codec options on Cisco MC3810 series equipped with HCM, and with codec
complexity set to high or medium:
•g711alaw—G.711 A Law, 64000 bps
•g711ulaw—G.711 u Law, 64000 bps
•g723ar53—G.723.1 Annex A, 5300 bps
•g723ar63—G.723.1 Annex A, 6300 bps
•g723r53—G.723.1, 5300 bps
•g723r63—G.723.1, 6300 bps
•g726r16—G.726, 16000 bps
•g726r24—G.726, 24000 bps
•g726r32—G.726, 32000 bps
•g728—G.728, 16000 bps
•g729abr8—G.729 Annex A and Annex B, 8000 bps
•g729ar8—G.729 Annex A, 8000 bps
•g729br8—G.729 Annex B, 8000 bps
•g729r8—G.729, 8000 bps
bytes (Optional) The voice payload for each frame.
payload-size (Optional) Number of bytes you specify as the voice payload of each frame.
Values depend on the codec type and the packet voice protocol. See Table 3 for
valid entries and default values.

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codec (dial-peer)
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Command History
Usage Guidelines A codec type can be configured on the dial-peer if it is supported under the codec complexity setting
you have specified.
The dial-peer configuration command is particularly useful when you must change to a
small-bandwidth codec. Large-bandwidth codecs, such as G.711, do not fit in a small-bandwidth link.
However, g711alaw and g711ulaw provide higher-quality voice transmission than other codecs. For
almost toll quality (and a significant savings in bandwidth), g729r8 provides near-toll quality with
considerable bandwidth savings.
If the destination router does not support a codec required by the originating router, the call setup fails.
You can change the payload of each voice packet frame by using the bytes payload-size setting. However,
increasing the payload size can add processing delay for each voice packet. Table 3 describes the voice
payload options and default values for the codecs and packet voice protocols.
Release Modification
11.3(1)T This command was introduced as a Cisco 3600 series VoIP dial-peer
configuration command.
12.0(4)T This command was modified for VoFR dial peers. On the
Cisco MC3810 series, this command was first supported as a dial-peer
command.
12.0(5)XK The g729br8 codec and pre-ietf keyword were added for the
Cisco 2600 and 3600 series.
12.0(7)T This command was implemented in the 12.0(7)T release.
12.0(7)XK The g729abr8 and g729ar8 codecs were added for the Cisco MC3810
series and the keyword pre-ietf was deleted.
12.1(2)T This command was implemented in the 12.1(2)T release.
Table 3 Voice Payload-per-Frame Options and Defaults
Codec Protocol Voice Payload Options (bytes)
Default Voice
Payload (bytes)
g711alaw
g711ulaw
Vo I P
Vo F R
Vo AT M
80, 160
40 to 240 in multiples of 40
40 to 240 in multiples of 40
160
240
240
g723ar53
g723r53
Vo I P
Vo F R
Vo AT M
20 to 220 in multiples of 20
20 to 240 in multiples of 20
20 to 240 in multiples of 20
20
20
20
g723ar63
g723r63
Vo I P
Vo F R
Vo AT M
24 to 216 in multiples of 24
24 to 240 in multiples of 24
24 to 240 in multiples of 24
24
24
24
g726r16 Vo I P
Vo F R
Vo AT M
20 to 220 in multiples of 20
10 to 240 in multiples of 10
10 to 240 in multiples of 10
40
60
60
g726r24 Vo I P
Vo F R
Vo AT M
30 to 210 in multiples of 30
15 to 240 in multiples of 15
30 to 240 in multiples of 15
60
90
90

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Examples The following example configures VoIP dial peer number 10 to use codec type g723r53 (G.723.1 at
5300 bps), and specifies a non-default voice payload size of 40 bytes:
router(config)# dial-peer voice 10 voip
router(config-dialpeer)# codec g723r53 bytes 40
Related Commands
g726r32 Vo I P
Vo F R
Vo AT M
40 to 200 in multiples of 40
20 to 240 in multiples of 20
40 to 240 in multiples of 20
80
120
120
g728 Vo I P
Vo F R
Vo AT M
10 to 230 in multiples of 10
10 to 240 in multiples of 10
10 to 240 in multiples of 10
40
60
60
g729abr8
g729ar8
g729br8
g729r8
Vo I P
Vo F R
Vo AT M
10 to 230 in multiples of 10
10 to 240 in multiples of 10
10 to 240 in multiples of 10
20
30
30
Table 3 Voice Payload-per-Frame Options and Defaults
Codec Protocol Voice Payload Options (bytes)
Default Voice
Payload (bytes)
Command Description
codec complexity This voice-card configuration command sets codec complexity and
call density.
show dial-peer voice Displays the codec setting for dial peers.