Henry Tang wrote:
On Tue, 10 Feb 2004, James Knott wrote:
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?
Yes, but that was back in the days when I worked for a communications company and we had *MANY* DS1s (proper name for "T1"). A DS1 can be extremely reliable, as communications comanies aim for "five nines" reliability. Your SLA may provide for fall back circuits etc.
Sounds like it DS1s today are not as reliable. I know our main store has a fall back circuit and our providers monitors our DS1, but i wonder if my DS1 backup will do any good if it the problem wasn't cabling problem. So if the provider is dead, even a backup from them will not work, unless they use a differet carrier.
That would depend on what you contracted for. If you want reliability, it costs more. For example, some of the systems I used to work on, had a fall back circuit, with automatic switching, should one of the service circuits fail. I have also worked on systems, with both fibre and microwave connections to the same site for redundancy or coming into two different areas of the building from two different directions, from two different COs and two different paths to the other end, to ensure reliablilty. However, that level of service costs money!