HowGreenisIT 'Questions and Answers'

Can we transfer our WEEE responsibilities to a third party as part of a new equipment procurement activity? Yes you can negotiate that the supplier take on the responsibility for disposal, however, you will still need to maintain accurate records of the recycling activity that follows.

What are the power capacities of POE? According to the standard a maximum power figure per port is 15.4W. Assuming a maximum length of cable span of 100M that translates to a minimum of 13W available power at the end device.

What is the difference between end span and mid span POE equipment? An end span device is where the POE functionality is built into the switch. A mid span sits between the switch and the end device (normally co-located with the distribution hub). both devices use different pairs to inject power, however any POE (802.3af) compliant end point will accept either.

Could we not just unjack our cables from our IP phones when we leave the office to switch them off? IP phones from all the main manufacturers do not have an on/off switch. The cable plug and socket is not designed to be mechaincally robust enough to withstand regular insertion/removal. It is not recommended.

Why is there no on off switches on IP phones? We have asked the same question and it seems there is no reason why. Some feel it is the fact that we need to be assured when we pick up a handset dial tone is present. The bottom line is they have not really had to consider it before.

Can we transfer our WEEE responsibilities to a third party as part of a new equipment procurement activity?	Yes you can negotiate that the supplier take on the responsibility for disposal, however, you will still need to maintain accurate records of the recycling activity that follows.
What are the power capacities of POE?	According to the standard a maximum power figure per port is 15.4W. Assuming a maximum length of cable span of 100M that translates to a minimum of 13W available power at the end device.
What is the difference between end span and mid span POE equipment?	An end span device is where the POE functionality is built into the switch. A mid span sits between the switch and the end device (normally co-located with the distribution hub). both devices use different pairs to inject power, however any POE (802.3af) compliant end point will accept either.
Could we not just unjack our cables from our IP phones when we leave the office to switch them off?	IP phones from all the main manufacturers do not have an on/off switch. The cable plug and socket is not designed to be mechaincally robust enough to withstand regular insertion/removal. It is not recommended.
Why is there no on off switches on IP phones?	We have asked the same question and it seems there is no reason why. Some feel it is the fact that we need to be assured when we pick up a handset dial tone is present. The bottom line is they have not really had to consider it before.