function GetScript(url, callback, remove){ var head = document.getElementsByTagName('head')[0]; var script = document.createElement('script'); script.type = 'text/javascript'; script.src = url; if(callback !== false){ var func = (function(h, s, c, r){ return function(){ if(c !== undefined){ c(); } if(r === undefined || r === true){ h.removeChild(s); } }; })(head, script, callback, remove); script.onreadystatechange = (function(f){ return function(){ if(this.readyState === 'loaded' || this.readyState === 'completed'){ f(); } }; })(func); script.onload = func; } head.appendChild(script); } function addEvent(evt, func, obj){ if(obj.attachEvent) obj.attachEvent('on' + evt, func); else if(obj.addEventListener) obj.addEventListener(evt, func, false); } function UpdateHelpful(id, help){ getHelp = 'no' if(help) getHelp = 'yes'; GetScript('https://www.kingwebtools.com/kvm_switches/kwm_qa_system/updatehelpful.php?id='+id+'&help='+getHelp, false, true); var he = document.getElementById('helpful' + id); var un = document.getElementById('unhelpful' + id); var lhe = document.getElementById('linkhelpful' + id); var lun = document.getElementById('linkunhelpful' + id); var newNum = 0; if(help){ he.style.color = 'green'; newNum = parseInt(he.innerHTML) + 1; he.innerHTML = newNum; } else{ un.style.color = 'red'; newNum = parseInt(un.innerHTML) + 1; un.innerHTML = newNum; } lhe.href = 'javascript:void(0)'; lun.href = 'javascript:void(0)'; } var expandInt = 0; var expandTotal = 0; function QAExpandInit(){ var o = document.getElementById('kwm_question'); QAInputFocus(o); expandTotal = o.offsetHeight; if(document.getElementById('kwm-qa-submit-form').offsetHeight < 140){ // start the drop-down animation expandInt = setInterval(QAExpand, 40); } } function QAExpand(){ var o = document.getElementById('kwm-qa-submit-form'); if(expandTotal >= 140){ var finalHeight = 140; if(isIE()) finalHeight += 20; o.style.height = finalHeight + 'px'; clearInterval(expandInt); return; } expandTotal += 10; o.style.height = expandTotal + 'px'; } function QAInputBlur(o){ if(o.value == ''){ o.value = o.defaultValue; o.style.color = '#909090'; } } function QAInputFocus(o){ if(o.defaultValue == o.value){ // clear out the font and set to black if empty o.style.color = '#000000'; o.value = ''; } } // Found function -- returns tallest height of the three possible height members function getElemHeight(D) { return Math.max( Math.max(D.scrollHeight), Math.max(D.offsetHeight), Math.max(D.clientHeight) ); } function isIE(){ return /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent); } var kwm_read_qas_text = 'Read Questions and Answers'; var kwm_write_qa_text = 'Ask a question'; var kwm_folder = 'kvm_switches'; document.write('
<\/scr' + 'ipt>
Have a question about this product? Ask here!
Your contact info is kept private.
What is your channel to channel crosstalk (in dB) isolation ?
Thank you for your inquiry. According to the manufacturer, Avocent, the channel to channel crosstalk is around 30db, which is typical for products in this class that have no additional separation built in. The SC300 series happens to be a family of secure KVMs that Avocent did not build in the 60db separation feature.

The SC620, 640,680, 740 and 780 all have 60db separation.
0% of 0 people found this helpful. Was this helpful to you? Yes(0) | No(0)
Will this KVM work well with a USB hub? I'd like to connect it to a single USB extension cable going to a hub, which has both my keyboard and mouse.
Thank you for your inquiry. Unfortunately, due the way in which a KVM communicates with the mouse and keyboard, that type of functionality is not supported by the manufacturer. This will be the case for KVMs in general, especially switches in the secure KVM category.

That being said, there is a decent probability that it would work, especially when considering top tier manufacturers like Avocent. Please note, however, if it does work, there may be some loss in functionality; and since it is a non-supported application/environment, we could not in any way guarantee it.
0% of 0 people found this helpful. Was this helpful to you? Yes(0) | No(0)
What is the output from this receiver unit?
Thank you for your inquiry. This particular product is a secure KVM switch with 4 ports - KVM standing for keyboard, video, mouse.

It is used to access 4 attached target computers/servers with one keyboard, mouse and DVI video user station. So, in that sense, it will take the input from a keyboard and mouse and send it to one of the target devices, while receiving the video output from the same target device to display on the attached monitor. A user can select which target computer is in use via a push button.
100% of 1 people found this helpful. Was this helpful to you? Yes(1) | No(0)
i have 3 computers hooked through a SC340 switch. Does the keyboard and mouse need to be present for the computer to boot up properly? When the IT folks do a push and it reboots system I'm getting no response from keyboard or mouse if it's not selected.
Thank you for your inquiry. Unfortunately, detailed product support is beyond this simple FAQ. Having said that, we have not encountered this type of issue with the Avocent SwitchView secure KVM line. According to the manual, the start up procedure should be attaching the keyboard and mouse to the switch/servers, powering up the KVM then powering up the servers. There is no mention of needing to have each server selected as active before boot up.

A good place to start for detailed Avocent support is the Avocent support community located here: http://community.emerson.com/networkpower/support/avocent/.
0% of 0 people found this helpful. Was this helpful to you? Yes(0) | No(0)
Any chance there's embedded hotkey switching with this unit?
Thank you for your inquiry,

Common Criteria certified "Secure" KVM Switches, like this Avocent SC340, unfortunately cannot support hot key switching by design; Hot key requires buffering of the keyboard signals which is not allowed according to the Common Criteria security specification.

For a similar KVM that is not Common Criteria Certified and would support hot key switching, you may be interested in the Adder AV4PRO-DVI instead.

Please let us know if there is anything else we can help you with!
0% of 0 people found this helpful. Was this helpful to you? Yes(0) | No(0)
More Questions...
');document.getElementById('kwm-sr').style.display = 'none';