[cisco-voip] Attendant Consoles

[Granger, Simon]

We are seeing problems when a receptionist is attempting to place any call.  This is only when the link between the Call Manager and remote office is  congested.  The receptionist reports that they have to very slowly key in the digits on the phone when dialled off hook.  This was leading me to investigate a possible signalling problem?  There are over 200 phones in the office and there are no over reports of the same problem.  It is only the handset that is attached to the PC with the AC.


Simon Granger
Senior Server Specialist

FM Global
1 Windsor Dials, Windsor, Berkshire, SL4 1RS, UK
T: +44 (0)1753 750154
F: +44 (0)1753 868700
www.fmglobal.com

From: Wes Sisk [mailto:wsisk at cisco.com]
Sent: 23 July 2009 18:52
To: Granger, Simon
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Attendant Consoles

RMI is used for controlling the phone. Line state updates are sent via UDP from server to client on a different port.  The port is configurable on the client. that would allow you to prioritize accordingly.

Can you provide a bit more information on "problems with the use of Attendant Consoles on congested links."

/Wes

On Thursday, July 23, 2009 9:44:11 AM , Granger, Simon <simon.granger at fmglobal.com><mailto:simon.granger at fmglobal.com> wrote:

We have various Attendant Consoles running throughout our IPT environment.  Some running across the WAN.  Relevant QOS is in place to prioritise RTP and all signalling traffic across our WAN and LANs.  We do sometimes see problems with the use of Attendant Consoles on congested links.  All other phones are fine in the same scenario.  Is there any specific signalling traffic that the Attendant Console uses.  I have seen that it uses TCP ports or 1099 through 1129 for Remote Method Invocation (RMI).  Should would be prioritising this also?

Thanks



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