I have a CME 7.1 that I'm trying to configure but I'm having troubles establishing voice path whenever a SIP phone is one party of a call. An SCCP to SCCP call can establish 2-way voice. However, if I make a SIP->SCCP, SCCP->SIP, or SIP->SIP call, I don't get 2-way voice.
I've captured packet traces for both endpoints and I can see that both endpoints are transmitting RTP traffic, and the neither is receiving inbound RTP traffic. One thing I do notice is that when I have a mixed call (one endpoint SIP and one endpoint SCCP) the CME appears to be detecting DTMF RFC2833 packets coming from the SIP endpoint and translates those in to an equivalent SCCP KeypadButtonMessage command so that the SCCP phone will hear the digit that was played by the SIP endpoint. So I know the CME is not only seeing the RTP stream coming from the SIP endpoint, it's also looking for RFC2833 DTMF event messages in the RTP stream.
I noticed there was a 'voice rtp send-recv' command that says "open RTP streams". I issued that command, but it did not make a difference.
I have a pretty straight forward configuration. Here are the related things:
- Code: Select all
!
voice rtp send-recv
!
voice service voip
callmonitor
media statistics
allow-connections sip to sip
fax protocol cisco
sip
header-passing
registrar server expires max 36000 min 600
no call service stop
!
voice register global
mode cme
source-address 192.168.80.205 port 5060
max-dn 42
max-pool 42
load 7960-7940 P0S3-08-6-00
authenticate realm test.com
tftp-path flash:
create profile sync 0000584505541133
!
voice register dn 7
number 4674676007
!
voice register pool 7
id mac 0018.8B85.XXXX
number 1 dn 7
dtmf-relay rtp-nte
username 4674676007 password 1234
codec g711ulaw
!
telephony-service
no auto-reg-ephone
max-ephones 32
max-dn 32
ip source-address 192.168.80.205 port 2000
system message Cisco Unified CME
load 7905 CP79050101SCCP030530B
load 7960-7940 P00308000500
time-zone 8
max-conferences 8 gain -6
transfer-system full-consult
create cnf-files version-stamp Jan 01 2002 00:00:00
!
ephone-dn 6
number 5006 secondary 4445006 no-reg both
name john doe
!
ephone 6
device-security-mode none
mac-address 0014.2291.XXXX
type CIPC
auto-line incoming
mwi-line 1
button 1:6
!
Am I missing some basic configuration parameter here? Can someone point me in a direction for further investigation?
Thanks,
//Robert