Hi,
I would like to register Cisco IP Phone 6921 with SIP firmware to Huawei AR Router ? earlier I was able to registered Cisco IP Phone 7945 with SIP firmware version 8.X to Huawei AR Router by modifying config file SEPXXXXXXXXXXX.cnf.xml and uploading the same using TFTP Server, but the same is not working for 6921 Phone, please if anyone has done this earlier , kindly help me.......