Cisco Unity Express only supports G711 codec which means calls placed from a remote site using another codec (i.e. G729) will need to be transcoded on the CME router. The example below is using a 2811 (IOS 12.4T) with a PVDM2-32 installed. Note that in the real CCIE lab a NM-HDV will be used which is configured differently than below.
R2#show version | include IOS
Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9_IVS-M), Version 12.4(11)T2, RELEASE SOFTWARE (fc4)
R2#show inventory | include PVDM
NAME: “PVDMII DSP SIMM with Two DSPs on Slot 0 SubSlot 4″, DESCR: “PVDMII DSP SIMM with Two DSPs”
PID: PVDM2-32 , VID: NA , SN: FOC09312XE2
R2#
! Enable the DSP Farm Services
voice-card 0
no dspfarm
dsp services dspfarm
!
! Permit h323 to SIP as the communication from CME to CUE is SIP
voice service voip
allow-connections h323 to sip
!
! Enable SCCP and determine the interface used to register
sccp local FastEthernet0/0.120
sccp ccm 177.1.120.254 identifier 1
sccp
!
! Defines the CCM group and enters SCCP configuration mode
sccp ccm group 1
associate ccm 1 priority 1
associate profile 1 register mta001a2f7e9300 <- MTA + MAC Address of Fa0/0.120
!
! Define the DSPFarm profile and specify transcoding
! Next specify the codecs that will be transcoded along with the maximum sessions
! Now associate it with the SCCP application
dspfarm profile 1 transcode
codec g711ulaw
codec g729ar8
maximum sessions 5
associate application SCCP
!
!
dial-peer voice 2999 voip
destination-pattern 2999
session protocol sipv2
session target ipv4:177.1.120.2
dtmf-relay sip-notify
codec g711ulaw
no vad
!
! Finally specify the number of units and transcoding sessions along with binding the session to CME
telephony-service
max-ephones 10
max-dn 100
ip source-address 177.1.120.254 port 2000
sdspfarm units 5
sdspfarm transcode sessions 5
sdspfarm tag 1 mta001a2f7e9300
cnf-file location flash:
voicemail 2999
!
!
ephone-dn 1 dual-line
number 2001
call-forward busy 2999
call-forward noan 2999 timeout 4
!
!
ephone-dn 99
number 8000….
mwi on
!
ephone-dn 100
number 8001….
mwi off
!
!
ephone 1
device-security-mode none
description R2 Phone 1
mac-address 0014.A8AC.D73F
fastdial 1 2002 name Phone 2
speed-dial 1 2002 label “R2 Phone 2″
type 7960
button 1:1 2:11
R2#show sccp
SCCP Admin State: UP
Gateway IP Address: 177.1.120.254, Port Number: 2000
IP Precedence: 5
User Masked Codec list: None
Call Manager: 177.1.120.254, Port Number: 2000
Priority: N/A, Version: 3.1, Identifier: 1
Transcoding Oper State: ACTIVE – Cause Code: NONE
Active Call Manager: 177.1.120.254, Port Number: 2000
TCP Link Status: CONNECTED, Profile Identifier: 1
Reported Max Streams: 10, Reported Max OOS Streams: 0
Supported Codec: g729ar8, Maximum Packetization Period: 60
Supported Codec: g711ulaw, Maximum Packetization Period: 30
Supported Codec: rfc2833 dtmf, Maximum Packetization Period: 30
Supported Codec: rfc2833 pass-thru, Maximum Packetization Period: 30
Supported Codec: inband-dtmf to rfc2833 conversion, Maximum Packetization Period: 30
R2#show sdspfarm units
mtp-1 Device:mta001a2f7e9300 TCP socket:[1] REGISTERED
actual_stream:4 max_stream 10 IP:177.1.120.254 19843 MTP YOKO keepalive 39
Supported codec: G711Ulaw
G729a
max-mtps:5, max-streams:10, alloc-streams:10, act-streams:6
R2#
Call is placed from remote site and forwarded to CUE VM
R2#show voip rtp connections
VoIP RTP active connections :
No. CallId dstCallId LocalRTP RmtRTP LocalIP RemoteIP
1 517 519 18058 31918 177.1.0.2 177.1.30.100
2 519 517 18566 16908 177.1.120.254 177.1.120.2
3 521 522 18562 2000 177.1.120.254 177.1.120.254
4 523 522 19370 2000 177.1.120.254 177.1.120.254
Found 4 active RTP connections
R2#show sdspfarm sessions callID 519
Stream-ID:4, srcCall-ID:519, codec:G711Ulaw64k , dur:20ms, vad:0, dstCall-ID:517, confID:3, mtp:2
Peer Stream-ID: 3, srcCall-ID:517, codec:G729 , dur:20ms, vad:0, dstCall-ID:519, confID:3, mtp:2
R2#
