ATA186 makes fax machine constantly off hook

Hello
First post!
I have a Cisco ATA 186 that is connected to a HP officejet 4500 all-in-one fax/printer. The ATA is configured properly, I did connect a "higher end" fax machine and was able to dial out and in (with in the system)
this particular fax does not have a "hook" option. The display reads "phone off hook" all the time. The manual (yes I read it) states that there is an adapter that shoudl be used or the machine will read "phone off hook" all the time. This did not solve the problem.
I think the ATA always give a dial tone without being asked for it. IOW, the fax does not say "hey give me a dial tone please".
Is there a way of the ATA providing a dial tone when asked? Or maybe the fax is incompatible?
Thank you for your help....

This is my suggestion:
- check if the telephony cable has only 1 couple of wire (tip and ring only); in the past I had some problems with cable with 4 wire (2 couple); the ATA had a strange behavior;
- try to connect an analog telephone to the ATA186 and verify if it works;
- if the problem persists probably the ATA has an hardware fault;
- try with a different ATA;
Best Regards.

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Hi All,
I have an issue for fxs port in voice gateway, the fxs port connceted to the fax machine is in off-hook state. it will change to on hook when i unplug the phone cable.
IOS Version : C2951-UNIVERSALK9-M version 15.2(4)M5.
H323 voice gateway.
shut and no shut on voice port, no any changes. please see attached picture.
Can someone please tell whether this is due to any IOS bug?

Now it's status is changed to on-hook, if i enter command " csim start 803" to test, the status will change to off-hook, but when i place a call from jabber to 803, the status is not changed, the status is still on-hook, maybe something is wrong on router?
I captured log on RTMT, please see bellow:
2014/09/13 11:25:53.294|SIPL|0|TCP|IN|192.168.100.11|5060|CSFReceptionist|192.168.100.17|1900|1,100,13,332.56^192.168.100.17^*|6952|[email protected]|INVITE
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2014/09/13 11:25:53.304|SIPL|21471657|TCP|OUT|192.168.100.11|5060|CSFReceptionist|192.168.100.17|1900|1,100,13,1.836^*^*|6954|[email protected]|183 Session Progress
2014/09/13 11:26:02.631|SIPL|21471657|TCP|OUT|192.168.100.11|5060|CSFReceptionist|192.168.100.17|1900|1,100,13,305.193^192.168.100.11^ANN_2|6955|[email protected]|404 Not Found
2014/09/13 11:26:02.632|SIPL|21471657|TCP|IN|192.168.100.11|5060|CSFReceptionist|192.168.100.17|1900|1,100,13,332.57^192.168.100.17^*|6956|[email protected]|ACK
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Gaston,
This is not the correct Feedback venue for your issue.
Please select an appropriate product from those displayed HERE and use the corresponding form to communicate to the correct department.
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I have a HP Officejet Pro 8500 wireless printer/fax/copier all in one.
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Phone Cord Connected to Correct Port on Fax ........ PASS
Using Correct Type of Phone Cord with Fax ............. PASS
Dial Tone Detection ....................................................... PASS
Fax Line Condition Test ................................................ PASS
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- Product No. : CB023A
- Serial No. CN0737R2DH
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ATA186 makes fax machine constantly off hook

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