[asterisk-users] Polycom registration fails

[Al]

Hello list,
I was wondering if any of you guys have had any luck with polycom in remote offices,
I'm facing a weird issue, polycom phones work fine in the main office, in remote office it says,
Registration from '<sip:202 at 10.0.1.190>' failed for '70.59.21.112' - Wrong password 
the odd thing is Linksys phone works without any issue!!
polycom wont register but its able to place calls!!! 
in wiki it says:
"If the phones fail to register with Asterisk but can still make outbound calls, you likely need to adjust the digest realm parameter from the default of PolycomSPIP."(http://www.voip-info.org/wiki-Polycom%20Phones)
anyone knows what does it exactly mean?
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