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Phone not registering on UC520

Hi Netpro Experts,

 

One of our customer having UC520 having issue with phone registration.

All the phones are just showing registering since 2 days but none actually registering.

I have already checked few things:

1. option 150 is correct in the dhcp and phone is getting the option 150 correctly

2. already tried no create cnf-files and create cnf-files.

3. ip source address is correct with port 2000

4. mac-address is correct for all the phones.

5. Switch config is correct and have all the port in voice vlan

 

I tied debug tftp events and see these resuslts:

002770: Apr  7 11:25:48.915: TFTP: Looking for CTLSEP5CA48A6419F4.tlv
002771: Apr  7 11:25:49.027: TFTP: Looking for ITLSEP5CA48A6419F4.tlv
002772: Apr  7 11:25:49.167: TFTP: Looking for ITLFile.tlv
002773: Apr  7 11:25:49.503: TFTP: Looking for Ring7.raw.sgn
002774: Apr  7 11:25:49.635: TFTP: Looking for Ring4.raw.sgn
002775: Apr  7 11:25:49.755: TFTP: Looking for SEP5CA48A6419F4.cnf.xml.sgn
002776: Apr  7 11:25:49.947: TFTP: Looking for XMLDefault.cnf.xml.sgn
002777: Apr  7 11:25:51.111: TFTP: Looking for CTLSEP5CA48A6419F4.tlv
002778: Apr  7 11:25:51.239: TFTP: Looking for ITLSEP5CA48A6419F4.tlv
002779: Apr  7 11:25:51.387: TFTP: Looking for ITLFile.tlv
002780: Apr  7 11:25:51.975: TFTP: Looking for Ring7.raw.sgn
002781: Apr  7 11:25:52.143: TFTP: Looking for Ring4.raw.sgn
002782: Apr  7 11:25:52.323: TFTP: Looking for SEP5CA48A6419F4.cnf.xml.sgn
002783: Apr  7 11:25:52.551: TFTP: Looking for XMLDefault.cnf.xml.sgn


Some and anyhelp will be appreciated.

 

 

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