I've implemented this in default.xml hoping to limit each of my two gateways to 150. 
Based on what's in http://wiki.freeswitch.org/wiki/Limit#Using_limit_with_per-gateway_or_per-user_channel_limits so hopefully that works.

    <extension name="zetta-cisco-1">
        <condition field="destination_number" expression="zetta-cisco-1">
                <action application="limit" data="db outgoing zetta-cisco-1 150" />
                <action application="bridge" data="sofia/gateway/zetta-cisco-1/${destnum}" />
        </condition>
    </extension>
    <extension name="zetta-cisco-2">
        <condition field="destination_number" expression="zetta-cisco-2">
                <action application="limit" data="db outgoing zetta-cisco-2 150" />
                <action application="bridge" data="sofia/gateway/zetta-cisco-2/${destnum}" />
        </condition>
    </extension>


Alex Ynema | IT Consultant
alex@opensystems.net.au

Level 1, 409-411 Oxford Street, Mount Hawthorne WA 6016
Office: +61 8 9427 2500
Mobile: +61 404 796 894

IT Consultant for Open Systems Support


On 29 May 2013 13:59, Alex Ynema <alex@opensystems.net.au> wrote:
Hi,
I'm trying to figure out how to limit the number of calls a Gateway is allowed to use. Our Sip provider has provided up with 200 which I need to set within the system somehow.
What's the best way to handle it for an outgoing only system.
I've been trying to figure out how how to configure 'Rate limiting concurrent outgoing calls via a provider' which is mentioned in the wiki a bit but nothing specific on what to actually do.

Alex Ynema | IT Consultant
alex@opensystems.net.au

Level 1, 409-411 Oxford Street, Mount Hawthorne WA 6016
Office: +61 8 9427 2500
Mobile: +61 404 796 894

IT Consultant for Open Systems Support