You don't actually configure anything. The other device making the call should be setting the bearer capability as data. At a guess, the other device is probably an analogue modem making a voice type modem call (v34bis, V90 or similar). If this is the case, then the ISDN WIC won't help as it does not have a corresponding digital modem module to place across the B channel to terminate the modem call.
Otherwise you need to determine why the remote device is making a speech call instead of a ISDN data call.
Post your config here so we can confirm how the router is configured.
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
Introduction Basic configuration for netflow Scale parameters for
netflow Netflow support Architecture Packet flow for netflow Inside the
LC CPU Netflow Cache size, maintenance and memory Sample usage Cache
Size Aging Permanent cache Characteristics Which...