Call signaling issue

HamzaD · ‎01-29-2020

Hi,

I have a CUCM V11 connected to a PBX System using a VG.

The calls from and to the two systems works fine, the problem is the following:

-when calling from the IP phones registered to the CUCM to the PBX system the call works but I didn't get the ring back tone neither the caller name on my IP Phone.

-when calling from PBX System to the CUCM I get no audio (I can't hear anything) only one way.

I am a beginner and I know that the problem is probably in the voice gateway!

Any help would be much appreciated.

Thank you all.

Regards,

silvervoip · ‎02-18-2020

Hello,

Can you please confirm below flow?

IP Phone --> (SIP or SCCP ? ) --> CUCM --> (MGCP/SIP/H323 ?) --> Voice Gateway

Model of VG?
IOS code of VG?

Thanks.

HamzaD · ‎06-30-2020

@silvervoip wrote:
Hello,
Can you please confirm below flow?

IP Phone --> (SIP or SCCP ? ) --> CUCM --> (MGCP/SIP/H323 ?) --> Voice Gateway
Model of VG?
IOS code of VG?

Thanks.

Hi,

Sorry for the delay.

IP Phones: SIP

H.323 Gateway:

Cisco 2811

Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(15)T9,

Configuration of the Cisco Gateway:

sh run
Building configuration...


Current configuration : 4304 bytes
!
!
hostname CCO-VG-01
!
boot-start-marker
boot-end-marker
!
card type e1 0 0
logging buffered 4096
!
aaa new-model
!
!
aaa authentication login defu local
!
!
aaa session-id common
network-clock-participate wic 0
dot11 syslog
!
!
ip cef
no ip dhcp use vrf connected
!
ip dhcp pool srst
   network 192.168.3.0 255.255.255.0
   option 150 ip 192.168.27.1
   default-router 192.168.27.50
!
!
multilink bundle-name authenticated
!
isdn switch-type primary-qsig
!
voice-card 0
 no dspfarm
!
!
!
!
!
!
voice class h323 1
 h225 timeout tcp establish 3
!
!
!
!
!
!
!
!
!
!
!
!
crypto pki trustpoint TP-self-signed-1473155935
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-1473155935
 revocation-check none
 rsakeypair TP-self-signed-1473155935
!
!
!
!

archive
 log config
  hidekeys
!
!
controller E1 0/0/0
 pri-group timeslots 1-31
!
controller E1 0/0/1
 framing NO-CRC4
!
!
!
!
!
interface FastEthernet0/0
 description CONNECTED TO CORE SWITCH
 ip address 192.168.27.50 255.255.255.0
 duplex auto
 speed auto
 h323-gateway voip interface
 h323-gateway voip bind srcaddr 192.168.27.50
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0/0:15
 no ip address
 encapsulation hdlc
 logging event nfas-status
 logging event subif-link-status
 isdn switch-type primary-qsig
 isdn timer T310 60000
 isdn overlap-receiving
 isdn protocol-emulate network
 isdn incoming-voice voice
 isdn send-alerting
 no cdp enable
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.27.251
!
!
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
logging trap debugging
logging 192.168.29.210
access-list 23 permit 10.10.10.0 0.0.0.7
!
!
!
control-plane
!
!
!
voice-port 0/0/0:15
!
!
!
!
!
dial-peer voice 100 voip
 tone ringback alert-no-PI
 preference 2
 destination-pattern 4...$
 voice-class h323 1
 session target ipv4:192.168.27.1
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
dial-peer voice 101 voip
 tone ringback alert-no-PI
 preference 3
 destination-pattern 4...$
 session target ipv4:192.168.27.2
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
dial-peer voice 1 pots
 destination-pattern .T
 direct-inward-dial
 port 0/0/0:15
 forward-digits all
!
dial-peer voice 4123 voip
 tone ringback alert-no-PI
 preference 1
 destination-pattern 4123$
 session target ipv4:192.168.27.1
 dtmf-relay h245-alphanumeric
 no vad
!
dial-peer voice 120 voip
 shutdown
 destination-pattern 45..$
 voice-class h323 1
 session target ipv4:192.168.123.187
 dtmf-relay h245-alphanumeric
 no vad
!
dial-peer voice 200 voip
 preference 4
 destination-pattern [5-7,9]...$
 voice-class h323 1
 session target ipv4:172.16.255.2
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
dial-peer voice 201 voip
 preference 5
 destination-pattern [5-7,9]...$
 session target ipv4:172.16.255.1
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
dial-peer voice 211 voip
 destination-pattern 4501$
 session target ipv4:172.16.255.2
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
dial-peer voice 212 voip
 preference 1
 destination-pattern 4501$
 session target ipv4:172.16.255.1
 dtmf-relay h245-alphanumeric
 ip qos dscp cs5 media
!
!
!
call-manager-fallback
 max-conferences 4 gain -6
 transfer-system full-consult
 ip source-address 192.168.27.50 port 2000
 max-ephones 30
 max-dn 30
 time-zone 25
 time-format 24
 date-format dd-mm-yy
!
privilege exec level 2 show
privilege exec level 2 debug
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
 privilege level 15
 login authentication defu
 transport input telnet ssh
line vty 5 15
 privilege level 15
 login authentication defu
 transport input telnet ssh
line vty 16 515
!
scheduler allocate 20000 1000
!
end

Ayodeji Okanlawon · ‎06-30-2020

What is the model of your pbx? Have you checked the documentation for integrating it to cucm? There may be specific configuration required which the documentation may point out.

One way audio is usually related to IP connectivity. We need to see where your media is terminated and then check if your phones have IP connectivity to the IP address..

You can do tests call and attach the following debug. Note they need to be enabled together

debug h225 asn1

debug h245 asn1

debug VoIP ccapi inout

Please rate all useful posts

Nithin Eluvathingal · ‎07-06-2020

-when calling from the IP phones registered to the CUCM to the PBX system the call works but I didn't get the ring back tone neither the caller name on my IP Phone. >> you need to check from the PBX.

-when calling from PBX System to the CUCM I get no audio (I can't hear anything) only one way.>>> add route on PBX to IP Phone network

TONY SMITH · ‎07-06-2020

For ringback you may need the following in your outbound pots dial peer.

progress_ind alert enable 8