NAT Problem with Cisco 1941 Router

[Wasif]

I have configured a static NAT for Polycom HDX 7000 on a Cisco 1941 Router. 

I am able to ping a remote device from the Polycom and it says that H.323 and SIP are reachable. 

But i can not establish a call to the same IP address. 

Any idea, what can be the issue over here? Do i need to post my configuration? 

Regards.

[a.onderwater]

Try this rules, solved for us many problems:

no ip nat service sip udp port 5060
no ip nat service sip tcp port 5060

regards, Arjan

[Wasif]

Hey a.onderwater

these rules will be under the access-list rite?

Thanks

[a.onderwater]

no, just type the rules in Cisco, doesn't matter where

[Wasif]

I m still not able to establish the calls through NAT. Only the no ip nat service sip udp port 5060 is shown in the config. it doesnt show the tcp command.

I m pasting my config, please have a look at it and suggest 

!
! Last configuration change at 10:08:32 UTC Wed May 28 2014
! NVRAM config last updated at 10:09:40 UTC Wed May 28 2014
! NVRAM config last updated at 10:09:40 UTC Wed May 28 2014
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ITRC-TEST
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
no ipv6 cef
ip source-route
ip cef
!
!
!
!
!
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
!
!
redundancy
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
ip address 192.168.24.2 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address Public IP Address
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
no ip nat service sip udp port 5060
ip nat pool POOL 192.168.24.10 192.168.24.20 netmask 255.255.255.0
ip nat inside source list 172 interface GigabitEthernet0/1 overload
ip nat inside source static 192.168.24.10 Public IP
ip route 0.0.0.0 0.0.0.0 ISP1 2
ip route 192.168.0.0 255.255.0.0 192.168.24.1
!
access-list 172 permit ip any any
access-list 172 permit tcp any range 0 65535 any
access-list 172 permit udp any range 0 65535 any
!
!
!
!
!
!
control-plane
!
!
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0
login
transport input all
line vty 1 4
login
transport input all
!
scheduler allocate 20000 1000
end

[a.onderwater]

dont use access-list 127

use

access-list 101 permit ip <local lan IP>  0.0.0.0 any

This setting is for all type of internet access

is the dialer/connection to the internet working from this router?

[Wasif]

Still i can not establish the connection when h323 is reachable from the polycom device. 

Here's the config now 

hostname ITRC-TEST
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
no ipv6 cef
ip source-route
ip cef
!
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
!
redundancy
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
ip address 192.168.24.2 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address Public IP Address
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
no ip nat service sip udp port 5060
ip nat pool POOL 192.168.24.10 192.168.24.20 netmask 255.255.255.0
ip nat inside source list 101 interface GigabitEthernet0/1 overload
ip nat inside source static 192.168.24.10 Public IP Address
ip route 0.0.0.0 0.0.0.0 Public IP Address 2
ip route 192.168.0.0 255.255.0.0 192.168.24.1
!
access-list 101 permit ip 192.168.24.0 0.0.0.255 any
!
!
!
!

[a.onderwater]

What kind of internet do you have? Or is the cisco behind another router??

What gives you the WAN IP and what is the gateway of that line?

[Wasif]

There's another Cisco router ahead of this router, from there the traffic goes out. 

When i directly route my polycom from that router, i can easily establish calls without natting. 

I m testing the NAT enviornment by putting in another router, because i do not have the access of the main gateway router.

[a.onderwater]

Are you using another subnet after the second Cisco?

Then you have to create a route in the first Cisco. All data for the second subnet route to the wan ip of the second Cisco