[Serusers] sccp to sip calling and vice versa

[Gould, Aaron]

does anyone understand how i would dial from a sccp phone using letters so that i could dial a sip aor url/uri ?
 
i have a ccm 4.0(2)a configured with a sip trunk and mtp so that i can dial from sccp phones joined up to the ccm to sip phones that are joined up to the sip proxy/registrar that i have the ccm sip trunk pointing to
 
but i can only do this if the username portion of the sip aor uri is numbers........like ....   sip:2001 at mylab.com  then from the sccp phone i dialed 2001 and the sip phone rings.
 
but what if my sip phone address is ....   sip:bob at mylab.com   ...how then do i dial the digits "bob" from the sccp phone?
 
aaron