Odd query, related to marketing

[millsey]

We have a marketing company who put calls through to us. At the end of the call (when the original caller hangs up) the marketing agency's system reads out a campaign code which our agents need to store in our CRM. If the agent hangs up that code is lost.

Is there a way to record the calls UNTIL THE CALLER hangs up? Or otherwise a way to prevent the hang up (we are using GXP2100 phones) ?

We do have VAD if that is required. I am thinking somethign like a conference call between the caller and the agent and record that or similar?

Thanks

Millsey