Problems with SIP Trunk (an audio course)

Hello world!

Our client is testing a new implementation of SIP with a different ISP trunk.

They have a SIP between a Cisco 2911 and ISP trunk to access the PSTN and a H323 trunk between CUCM worm 7.1.3.30000 - 1 good routing of calls to the Cisco2911 gateway.

Here you have the Cisco 2911 configuration:

VoiceGW-B #sh runn
Building configuration...

Current configuration: 9341 bytes
!
! Last configuration change at 19:09:50 AST Thursday, January 24, 2013, by admin
!
version 15.0
Service nagle
no service button
tcp KeepAlive-component snap-in service
a tcp-KeepAlive-quick service
horodateurs service debug datetime localtime show-timezone msec
Log service timestamps datetime localtime show-timezone msec
encryption password service
sequence numbers service
!
hostname VoiceGW-B
!
boot-start-marker
boot-end-marker
!
map of type t1 0 0
enable secret 5 $1$ T05j$ vJkR0V2l2/Iu1mIIeVPcu1
!
No aaa new-model
clock timezone AST - 4
network-clock-participate wic 0
network-clock-select 1 T1 0/0/0
!
No ipv6 cef
IP source-route
IP cef
!
!
!
!
IP domain name domain.local
Authenticated MultiLink bundle-name Panel
!
!
!
!
primary ISDN switch type - or
!
!
!
voice-card 0
dspfarm
DSP services dspfarm
!
!
!
voip phone service
h323 connections allow h323
allow connections h323 to SIP
allow connections sip h323
allow sip to sip connections
Fax protocol t38 nse force ls-0 hs-redundancy redundancy 0 relief pass through g711ulaw
H323
SIP
90 min - to
header-passage
offer-early forced
midcall-signalling passthru
!
class 333 voice codec
g711ulaw codec preference 1
codec preference 2 g729r8
!
voice class codec 2
g711ulaw codec preference 2
g711alaw preferably 3 codec
!
voice class codec 1
g711ulaw codec preference 1
g711alaw preferably 2 codec
preferably 3 codec g729r8
!
vocal h323 class 1
H225 timeout tcp establish 3
!
!
!
!

!
!

!
redundancy
!
!
controller T1 0/0/0
long CableLength 0dB
time intervals PRI - Group 1-24 service mgcp
Description SF 137-6042 primary (GWYN - A 137-6041 redundante)
!
!
!
!
!
interface Loopback0
Description * USED for IPT, ROUTING, MANAGEMENT ETC... *.
192.168.100.11 IP 255.255.255.255
no ip redirection
no ip proxy-arp
H323-gateway voip interface
H323-gateway voip bind port 192.168.100.11
!
interface GigabitEthernet0/0
trunk SIP ISP description
IP 120.100.11.135 255.255.255.128
NAT outside IP
IP virtual-reassembly
automatic duplex
automatic speed
!
interface GigabitEthernet0/1
Description * has P2P to 4506 Core *.
IP 192.168.101.6 255.255.255.252
no ip redirection
no ip proxy-arp
automatic duplex
automatic speed
!
interface GigabitEthernet0/2
Description * P2P to 4506 Core B *.
IP 192.168.101.14 255.255.255.252
no ip redirection
no ip proxy-arp
automatic duplex
automatic speed
!
interface Serial0/0/0:23
Description * channel ISP_2 D *.
no ip address
encapsulation hdlc
primary-dms100 ISDN switch type
ISDN incoming-voice
ISDN-Manager of ccm of bind-l3
No cdp enable
!
!
Router eigrp 100
network 192.168.100.11 0.0.0.0
network 192.168.101.6 0.0.0.0
network 192.168.101.14 0.0.0.0
passive-interface default
no passive-interface GigabitEthernet0/1
no passive-interface GigabitEthernet0/2
EIGRP stub connected summary
!
IP forward-Protocol ND
!
IP http server
no ip http secure server
IP http access path flash: / GUI
!
IP route 120.100.0.0 255.255.0.0 120.100.11.129
!
record 10.2.173.5
access-list 1 permit 192.168.5.0 0.0.0.255
!
!
!
!
!
!
!
!
!
!

control plan
!
!
voice-port 0/0/0:23
!
Voice-port 1/0/0
!
Voice-port 1/0/1
!
Voice-port 1/0/2
!
Voice-port 1/0/3
!
Voice-port 1/0/4
!
Voice-port 1/0/5
!
Voice-port 1/0/6
!
Voice-port 1/0/7
!
CCM-Manager redundant-host 192.168.4.11
CCM-Manager mgcp
music of blocking CCM-Manager
!
MGCP
type of service mgcp MGCP call-agent 192.168.4.12 version 0.1
codec to voip MGCP dtmf-relay all the out-of-band mode
MGCP rtp inaccessible timeout 1000 action notify
voip MGCP modem ESN passthrough mode
MGCP ip qos dscp cs3 signaling
MGCP package rtp-package capacity
MGCP package-capability OSH-package
MGCP package-capability pre-package
No package-ability mgcp package-fxr
No mgcp timer receive-rtcp
MGCP sdp simple
MGCP t38 fax inhibit
MGCP rtp payload type static g726r16
MGCP bind control source-interface Loopback0
MGCP bind media source interface Loopback0
!
profile MGCP default
!
!
voice pots Dial-peer 10
Service mgcpapp
port 1/0/0
!
voice pots Dial-peer 11
Service mgcpapp
port 1/0/1
!
Dial-peer voice 12 pots
Service mgcpapp
port 1/0/2
!
voice pots Dial-peer 13
Service mgcpapp
port 1/0/3
!
voice pots Dial-peer 14
Service mgcpapp
port 1/0/4
!
voice pots Dial-peer 15
Service mgcpapp
port 1/0/6
!
voice pots Dial-peer 17
Service mgcpapp
port 1/0/7
!
Dial-peer voice 16 pots
Service mgcpapp
port 1/0/5
!
Dial-peer voice voip 3001
your reminder alert-non-PI
Description * Testint ISP OUTGOING for LOCAL CALLS *.
translation-profile outgoing DN-to-E164-srst
preference 10
destination-model 12122067379
session protocol sipv2
session target ipv4:120.100.1.10
numbers-fall of DTMF-relay rtp - nte
Codec g711ulaw
No vad
!
Dial-peer voice voip 9004
Description * CM. PRIMER NOT piloto *.
preference 1
destination-model 1358
session target ipv4:192.168.4.11
codec voice-class 1
DTMF-relay h245 alphanumeric
IP qos dscp cs3 signaling
No vad
!
Dial-peer voice voip 9005
Description * secondary CM for ONLY piloto *.
preference 2
destination-model 1358
session target ipv4:192.168.4.12
codec voice-class 1
DTMF-relay h245 alphanumeric
IP qos dscp cs3 signaling
No vad
!
Dial-peer voice voip 999
SIP INBOUND DIALPEER description
incoming called-number.
DTMF-relay rtp - nte
Codec g711ulaw
!
!
NUM - exp 12126169799 1358
2122067379 12122067379 NUM - exp
entry door
receive timer-RTP 1200
!
!
!
access controller
Shutdown
!
!

=====================

Well, we can set up incoming and outgoing calls with no problems during this test phase, but we will succeed voice entering.

We don't have voices coming out of the voice gateway.

We checked with the ISP and we see the RTP of ISPS to Cisco 2911Voice gateway traffic, but we did not see packets RTP voice to the ISP gateway.

In fact, it was not all RTP packets arriving at the voice gateway on the internal network.

Might be a routing problem?

Internal CUCM and phones require Ip routing SIP from the ISP server access? If I understand correctly the devices internal only need to know how to get to the voice gateway Cisco2911, so it can function as a Proxy traffic and route to the SIP server?

Thank you

In addition to the comments of Chris,

1. There is a routing problem: IP phones should see the route to the ISP, even if they are inside a NAT.

2. If you want that:

-Just IP phones reach the 2911 and IP of 2911 present the call to the ISP.

-the Loopback0 bring the H323

- And the int GigabitEth 0/0 for the SIP

then

Configure the 2911 as a CUBE in path mode

Use the redirection ip2ip

Configure dspfarm on the 2911

3 also check this:

If you have not seen all the voice gateway to ISP RTP packets

Then

-Check if the transport of the ISP session is TCP or UDP.

-Set up a GUY on the 2911 to check the communication between the {2911 and ISP} and {2911 and CCM}

Kind regards

Antra

Tags: Cisco Support

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    ______________________________________________________________________________

    Call with TC 7.2.1 does not
    ______________________________________________________________________________

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