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Callee/Caller removal from Blacklist via CLI

Publication Date:  2017-10-27 Views:  121 Downloads:  0
Issue Description

Customer has an environment Management/Secretary 

  •  IP Phone 7950 as Secretary 
  •  vvx1500 Polycom as Management 
  • with two extensions configured on each device and a PBX u1980 V100R001C01SPC900

  • (15003 & 85003) for Huawei
  •  (15001 & 85001) for Polycom

*Customer was unable to make calls to extension 85001 located in the polycom hearing a message that says 'NOT POSSIBLE PERFORM CALL, TRY LATER', others extensions were working fine taking/making calls.  

Alarm Information
When (Secretary/IP Phone 7950) made the call from 85003 or 15003 to 85001 (Management/Polycom),  received the error message  'NOT POSSIBLE PERFORM CALL, TRY LATER'... however when secretary test it again dialing to the other extension from Management/Polycom 15001, the call was completed. 
Handling Process

A) : Version was confirmed throuth CLI command show version, version installed was V100R001C01SPC900 (This version doesnt provide WEB interface access for troubleshooting with this scenario.)

     *Unable to perform an Upgrade due to operation environment with customer, multiple devices will be affected during upgrade process

B) : Tests were made, configuring extension 85001 in Huawei PBX u1980... status was the same, (unable to reach 85001-Management) either u1980 and Polycom.

C) : Command to know status of Blacklist group was introduced ... 

  • show blackandwhite calltype callee grouptype blackgroup.

D): Extension found in that group (85001), this parameter refuses any input call... it was removed through command ...

  • config delete blackandwhite calltype callee grouptype blackgroup

Root Cause

Affected extension for management (85001)was added into a blacklist, users were unable to reach it, dialing from Secretary number (15003/85003) in the PBX, even from any PSTN number.


extension (85001) was verified and removed from u1980 blacklist group V100R001C01SPC900 through CLI command.

show blackandwhite calltype callee grouptype blackgroup.

config delete blackandwhite calltype callee grouptype blackgroup