[Mark McLeod]

It appears to me to be to be identical to last year's barrel connector.
Although Al insisted it wasn't in another thread.

It does work.

P.S.
Talked with Al. It seems his old barrel connector is not the same as mine, so you need to verify your own.
The outside barrel must be the correct fit, but also the inside center must not be loose (Al's issue) on the D-Link pin. Some barrel connectors have a larger center hole than others. The one we got with our Linksys in 2009/2010 has, in addition to the hole, a pair of spring contacts.
Here's a comparison shot of one of the Linksys wall-warts that matches the D-Link.

P.S.
Sorry I mis-read and had the D-Link instead of the Axis camera on my mind.