RE: ATA186 no ring behind NAT

["John Baggott" <johnbaggott@yahoo..co.uk>]

Hi Jeff

 

The only suggestion I can make at the moment is the Voice Gateway may not be sending back the correct messages (PI call progress indication) to allow the ATA to open the RTP stream early, if it is a Cisco GW then look at PI 8&3 for the ISDN port.

 

Regards

 

John    

 

-----Original Message-----
From: openh323gk-users-admin@lists.sourceforge.net [mailto:openh323gk-users-admin@lists.sourceforge.net] On Behalf Of Jeff Chen
Sent: 28 January 2004 21:04
To: openh323gk-users@lists.sourceforge.net
Subject: RE: ATA186 no ring behind NAT

 

John

 

 i tried to set ConnectMode = 0x00080000 or 0x00000040, or 0x00000000.  still couldn't get ring behind NAT. could you suggeste a value?

 

 

Jeff

 

John Baggott <johnbaggott@yahoo..co.uk> wrote:

Hi

The term for what you want is called “ringback” or call progress tones. The following is an extract from  http://www.cisco.com/en/US/products/hw/gatecont/ps514/prod_release_note09186a00801097fe.html#27276

 

I hope this helps the thing to look out for the gateway to the public voice network must support passing the Progress Indicators back to the ATA the is a lot more information on the Cisco web site.

 

Regards

 

John

 

 

IP Ringback

The called Cisco ATA 186 now provides IP ringback across the network so it resembles the traditional Public Switched Telephone Network (PSTN). Previously the Cisco ATA 186 used only local ringback. If the IP Ringback feature is enabled, a progress indicator (PI) with progress descriptor #8 (Inband information or an appropriate pattern) is sent in the H.225 alert message in response to an H.225 Setup message. Once media-ready status is determined, ringback is generated from the Cisco ATA 186 to the caller's side.

You can now configure the calling Cisco ATA 186 to decode RTP packets (for example, tones and announcements) received prior to connection only when a valid PI is received.

Configuration

To enable IP Ringback on the Cisco ATA 186, set the NetworkRingback bit (bit 19) in the configuration ConnectMode to 1. (ConnectMode = 0x00080000)

To enable the Cisco ATA 186 to require a PI before decoding RTP packets, set bit 6 in the configuration ConnectMode to 1. (ConnectMode = 0x00000040)

 

 

-----Original Message-----
From: openh323gk-users-admin@lists.sourceforge.net [mailto:openh323gk-users-admin@lists.sourceforge.net] On Behalf Of Jeff Chen
Sent: 28 January 2004 15:14
To: openh323gk-users@lists.sourceforge.net
Subject: Re: ATA186 no ring behind NAT

 

1. setup gnugk on NAT computer as proxy

2 ATA186 behind NAT registers to Gnugk

3. make a call to a gateway on public IP,  if the callee answers the phone, get two way voice, but no ring before answer.

4 test by openphone , openphone can get ring.( if put ata186 on a public IP, it can get ring too)

 

are there any solution for ATA 186 to get ring before answer?

 

 

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