On Tue, 2004-02-10 at 16:53, Henry Tang wrote:
Hi,
I know this is not suse related, but i think someone here can answer my question concering a backup line for t1. I have a store and it needs to communicate with an outisde server and be on the net. I heard that a t1 is suppose to be up 99.9 percent of the time, so is it necessary to have a backup, maybe like an isdn? Has anyone experienced a t1 going down?
Many many times. You can end up with problems on the T1 or in the
equipment on either end. So they can and do go down.
Depending on your requirements and network architecture ISDN dial backup
can be used. Have set that up on a large number of sites along with
HSRP to protect against hardware failures at the end points.
But if you can afford to have that store out of communications for some
number of hours you may be able to get by without a backup circuit. It
really depends on the costs of being down verses the costs of having a
backup circuit plus the equipment plus the knowledge to set it up.
You may need to do a risk analysis to determine what is likely to fail
and the costs associated with such failures and the costs of providing
redundancy.
--
Scot L. Harris