Eltek -48V DC Rectifier / Supply

As I am sure many of you are aware, much of our equipment is powered from -48V DC, often referred to as telco supply. Some is AC powered but almost all is available with -48V DC supplies and some (Cisco 7206 for example) is available with both.

Because we have small pop sites and larger data centres the power requirement and sustainability is varied. For example we will be running pop sites on purely -48V DC with a 72 hour sustainability and the data centre will be generator, ups and utility mains fed. However we still need to get utility power to -48V for battery charging and actually running the kit.

We were looking at various suppliers, but today Eltek came up trumps with their new Flatpack range of rectifiers and system monitors. The chassis are all N+1 on the rectifiers, fully hot swappable and expandable too and at a quite excellent price. Also their turn around on quotations was speedy, which is refreshing at the moment. Looks like we have a deal!

.

http://www.nirenet.net/

Leased Line / Transit Supplier (Pt2)

After chasing Cable and Wireless again, I finally got this one line email from them (a week after meeting them to request a quote and chasing them by telephone)

"Pete,

As per our conversation I will start working on this today and will update you on my progress tomorrow afternoon.
Regards"

Arrrggghhhh....
.
.
.

Www.NireNet.Net

Leased Line / Transit Supplier

Hmm had a none productive meeting with Cable and Wireless today about resilent tail circuts to Northern Ireland. We are pretty set on our primary supplier, but are looking for a completely independent one for the seconday circuit.

Sometimes it feels like trying to extact blood from a stone getting a simple quote from these guys. It can't be that difficult to provide pricing for Layer-2 to London and possibly Layer-3 full transit at a commited rate on a Gig tail now can it.... I shall pull some more hair out..
.
.
.

Www.NireNet.Net

Server Backup Nas's

Finally we've made a decision and taken delivery of our NAS boxes for the local infrastructure backups from Infrant Technologies.

We decided on the ReadyNas 1100 which is an excellent price point for 3Tb of storage and utilising EMC Retrospect multi server edition we can run hourly point in time snapshots of the SQL databases and logs and also the other "infrastructure" data that we need backed up on a very regular basis.

The device performance is excellent, running Raid 5, giving us 2.25Tb of usable disk space, we estimate to be able to hold nearly six months of point in time backups and it is writing via a single backup server managing job schedules and such at 350Mb/s to disk. Excellent.
Backups will be held either in London or Leeds, we haven't decided on the final location yet and we may actually buy a second set and run mirrors of the backup set for complete resiliency..
.
.

Www.NireNet.Net