[cisco-voip] Monitoring H323 Trunk Status

[James.Brown at barclayswealth.com]

Once again, many thanks for the clarification Wes. I will look at monitoring the availability of the service using synthetic transactions. I suspect this is the only way to be sure that both CUCM and Rightfax are operational. 

James.

-----Original Message-----
From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: 03 March 2011 19:43
To: Brown, James : Barclays Wealth
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Monitoring H323 Trunk Status

Inline, ws.

On 3/3/2011 12:42 PM, James.Brown at barclayswealth.com wrote:
> All,
>
> Does anyone know whether it is possible to monitor the status of a Non-GK controlled H323 trunk please?
ws: what are looking to monitor?  If non-GK controlled then there really 
isn't anything that remains active that is externally observable.  The 
thread remains active in the cm process but there's not real visibility 
into that.
> I'm thinking of this in the context of a trunk out to a Rightfax server. I'm not sure whether these trunks hold a TCP connection open
ws: nope, TCP session is established per-call. CUCM still does not 
support tunneling. Tunneling would allow multiple h225/h245 sessions on 
a single TCP session. IOS has this but not CM.
> or send any keepalives.
ws: keepalives are exchanged for active calls based on a service 
parameter. For some history see:
CSCsq17141    CUCM - Allow TCP KeepAlives for H.323 should enable H.245 
TCP KAs also
>   Incidentally, does an H323 Gateway device behave any differently from a trunk in this respect?
ws: There are subtle differences.  CM sends out custom information over 
h323 trunk that is not sent over h323 gateway.  That custom information 
is sent using standard h323 extensions.  If an endpoint does not use a 
fully compliant stack it may fail to parse the extension elements.  
Using an h323 gateway avoids sending those elements.  There may be other 
subtle differences as well.
> Many thanks in advance.
>
> Regards
>
> James.
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Barclays Wealth is the wealth management division of Barclays Bank PLC. This email may relate to or be sent from other members of the Barclays Group.

The availability of products and services may be limited by the applicable laws and regulations in certain jurisdictions. The Barclays Group does not normally accept or offer business instructions via internet email. Any action that you might take upon this message might be at your own risk.

This email and any attachments are confidential and intended solely for the addressee and may also be privileged or exempt from disclosure under applicable law. If you are not the addressee, or have received this email in error, please notify the sender immediately, delete it from your system and do not copy, disclose or otherwise act upon any part of this email or its attachments.

Internet communications are not guaranteed to be secure or without viruses. The Barclays Group does not accept responsibility for any loss arising from unauthorised access to, or interference with, any Internet communications by any third party, or from the transmission of any viruses. Replies to this email may be monitored by the Barclays Group for operational or business reasons.

Any opinion or other information in this email or its attachments that does not relate to the business of the Barclays Group is personal to the sender and is not given or endorsed by the Barclays Group.

Barclays Bank PLC. Registered in England and Wales (registered no. 1026167).
Registered Office: 1 Churchill Place, London, E14 5HP, United Kingdom.

Barclays Bank PLC is authorised and regulated by the Financial Services Authority.