[Serusers] Grandstrean Registration Problem

[Gregory Sandul]

Hi All.
We have got Grandstreams with
Software Version: Program--1.0.4.45 - it came
preinstalled.
The problem is that phones are trying to register on
sip server every 1 minute, no mater of Register
Expiration value. The Register Expiration value
affects only Expires field in sip message. 
The questions:  is it present in other versions of
Software? Must I switch to other version of software?
 
Thanks.

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