Internal DN call from external but pickup by others company

[Mohd Khairul Nizam]

I would like to know, we have internal extension from 2001 – 2499.

One of the extension, (2156) if someone from external call to the extension, it pickup by different company.

I have check with Telco, they revert that the full DDI range  of 2100 – 2499 belong to other customer.

how can i prevent this issue ?

[Dennis Mink]

how does your deployment connect to PSTN from external to internal?

if the full E164 number,. that belongs to the 2165, gets dialled from external, does it hit your voice gateway as an inbound call?

if not then yes you will need to talk to your provider why that call gets routed to something else. I am assuming you are getting billed for that number??

[HARIS_HUSSAIN]

1) When you make outbound external calls form 2156 does the caller-id displayed on external phone full DID Number or Pilot Number. Usually, ISP will override the CallerID to one in DID Range.
2) You need to check with the provider to get the required DID Range.

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Thanks,
Haris

[Mohd Khairul Nizam]

1. it will show the external number

2. Telco have revert, they have assigned the same range as my Internal DN

my Internal DN = 2001 - 2499

Telco inform they also have DID of 8213 2001 - 2499 to other company, not mine

[HARIS_HUSSAIN]

Can you specify below
1) What is the Ful DID Number you dial for 2165.
2) Enable Debugs in Your VOice gateway [ debug ISDN q931] & verify if you are getting any call. Check if there is any call forwarding done for this DN
3) Also enable debug isdn q931 when you are making call from 2165.

*** Please rate helpful post; Mark "Accept as a Solution" if applicable

Thanks,
Haris