Zoho CRM Phonebridge: calling contacts with extensions

Is there a way to store phone extensions that will parse the phone number correctly and either dial (or at least ignore) the extension?

I'm getting an error from Twilio trying to call a contact with an extension number.

Using a comma (1-450-652-6200,245 ) the number is split in too and both 1-450-652-6200 and 245 are called, resulting in a error for the second one.

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Dial record="false" callerId="+18553179317" action="https://crm.zoho.com/ctiapi/xml/ctistatuscallback/twilio?authtoken=xxxxxxxxxxxxxxxxx" timeout="30">
        <Number>1-450-652-6200</Number>
        <Number>245</Number>
    </Dial>
</Response>

Using a P for pause, the whole number is rejected.

BTW, the comma or semi colon is often a pause in other systems and I'd like that.

For reference, dialing an extension in Twilio

https://www.twilio.com/docs/api/twiml/number#attributes-sendDigits