Thanks its work with the b options :
exten => 100,1,Set(PJSIP_HEADER(add,Alert-info)=answer-after = 0)
exten => 102,1,Page(PJSIP/102,b(testing^100^1))
Thanks its work with the b options :
exten => 100,1,Set(PJSIP_HEADER(add,Alert-info)=answer-after = 0)
exten => 102,1,Page(PJSIP/102,b(testing^100^1))