[Serusers] Call between SER proxy servers of different domain

[Ranganath B]

Hi,

Was trying to make calls between 2 SIP soft phones which are registered with
2 different SER SIP proxy servers running on different machines but it fails
always. When I make a call from Soft Phone-A registered with SER-A to Soft
Phone-B registered with SER-B it fails. Soft Phone-A receives 407 response
to its INVITE from SER-B and always fails to authenticate. Please provide me
inputs on how to solve this problem. I have tried even adding Soft Phone-A's
username and password in SER-B but none of them worked.

I have another doubt about "aliases" in SER. Can I make some effective use
of this and solve the problem mentioned above?

Thanks in advance,
Ranganath
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