[asterisk-users] dtmf during a call

[Julian Lyndon-Smith]

I've been asked to look into this for security reasons:

During a call, a credit / debit card payment may be required. At the 
moment, the card details are given over the phone. This is not ideal for 
obvious reasons.

I was wondering if it would be possible

a) for the agent to ask the caller to enter their card details by 
pressing the numbers during the call.

b) for the caller to be transferred to a new extension where they enter 
their details, and the agent goes on hold. When the details have been 
entered then the caller is returned back to the agent.

I know that we could ask the caller to ring again to a different number, 
or get the agent to transfer the caller to the new extension, but was 
wanting the agent to remain connected to the caller after the details 
have been entered.

Anyone done anything similar ?

Thanks in advance

Julian