call transfer not working for PSTN
I have two cluster one having CUCM 7.1.5 and another having CUCM 8.6.2
normal cisco IP phone 7940 are registered in CUCM 7.1.5 and cisco E20 are registered in CUCM 8.6.2
Intercluster Trunk is used b/w two cluster.
Caller A (cucm 7.1.5 & cisco 7940) dials PSTN number call connected successfully.
Caller A transfers call to Caller B which is in CUCM 8.6.2 (cisco E20).
In caller A shows transfered successfully but in E20 call directly goes to hold says operator is put you on hold. displays nothing..
what is issue..??/