softkey features are not working on external calls. Features like call transfer, hold, conference etc. They are working on internal calls. The calls are from other sites which have their own CMEs and over the SIP trunk directly to this site. The gateway is same in all scenarios, which is a H323 gateway.
I am not sure if I have changed any service/enterprise parameter which has forced it to stop. Any pointers as what can cause it will be great.