MC7455 link disconnected message receved every 120 sec

We are using MC7455 for embedded linux.

After 120sec after AT Command(AC!SCACT=1,1), link disconneted.
I think link disconnect message received from Lte Modem chip.
I don’t know why lte modem chip send this message.
Could you explain the reason to me?
Thanks.

GobiNet::ReadCallback(2065) Read 34 bytes
GobiNet::PrintHex(2065) : 01 21 00 80 01 24 04 11 00 22 00 15 00 01 02 00 01 00 10 02 00 02 00 11 04 00 03 00 D0 07 12 01 00 04
GobiNet::FindClientMem(2065) Found client’s 0x2401 memory
GobiNet::ReadCallback(2065) Creating new readListEntry for client 0x2401, TID 0x11
GobiNet::FindClientMem(2065) Found client’s 0x2401 memory
GobiNet::NotifyAndPopNotifyList(2065) notify Start Client:0x2401, TID:0x11, TID:0x0 mpData:0x (null)
GobiNet::PopFromReadMemList(2065)
GobiNet::FindClientMem(2065) Found client’s 0x2401 memory
GobiNet::PopFromReadMemList(2065) *ppReadMemList = 0xc6878580 pDelReadMemList = 0xc6878580
GobiNet::PopFromReadMemList(2065) *ppReadMemList = 0xc6878580 pDelReadMemList = 0xc6878580
GobiNet::PopFromReadMemList(2065) *ppData = 0xc6878300 pDataSize = 34

GobiNet::QMIWDSCallback(2065) Net device link is disconnected

GobiNet::FindClientMem(2065) Found client’s 0x2401 memory
GobiNet::AddToNotifyList(2065) ClientID:0x2401, TID:0x0
GobiNet::FindClientMem(2065) Found client’s 0x2401 memory
GobiNet::NotifyAndPopNotifyList(2065) notify End Client:0x2401, TID:0x11, TID:0x0
GobiNet::NotifyAndPopNotifyList(2065) notify for Client:0x2401, TID 0x11
GobiNet::ReadCallback(2065) ReadCallback:952 Found ClientID:0x2401 , TID:0x11
[2017-11-22 00:54:53] eth2’s PHY Connection [2a:a0:92:0c:8c:08] - down

Hi,

This problem needs a detailed technical analysis. Please contact your Technical support in SWI to provide you the solution.
Also provide complete AT logs including ATI9 command response, complete syslog starting from module power ON till issue being observed and make sure debug messages are enabled.

Thanks & Regards,
Moderator