|
Connection Types |
|
Advantages |
|
Seamless? |
|
Disadvantages |
| 10Mb Fiber with T1 or DSL Backup |
|
Fast 10Mb x 10Mb
High reliability of fiber
Diverse path & telco equipment.
Fiber is homed to both of our POPs.
T1 or DSL homed to the other. |
|
Yes |
|
Works best with single ISP
More costly than T1 |
| Multi-Vendor T1 |
|
Diverse upstream ISP's
Twice the bandwidth
Uses BGP4 - truly path and ISP independent. |
|
Yes |
|
Still depends on same telco wire bundle and telco
equipment.
Requires BGP4, which requires that customer justify a full /24
address space of 255 ip addresses.
Security services must be based at customer site. |
| T1 with DSL Backup |
|
Backup speed close to T1
Some additional bandwidth over T1
DSL uses entirely different telco equipment than T1
Our DSL head end is in downtown Atlanta, while the T1 head end is in
Marietta. |
|
Yes |
|
Depends upon same telco wire bundle.
Only works with single ISP
|
| T1 or DSL with Satellite Backup |
|
Diverse path with no telco equipment in common.
Cable cuts, power outages, C.O. problems bypassed by satellite. |
|
No |
|
Satellite latency much greater than DSL or T1.
Unsuitable for VOIP. |
| DSL with dial backup |
|
Inexpensive (or free)
DSL uses different telco system than POTS. |
|
No |
|
Works only with single public ip
Slow in backup mode
Depends on same telco wire bundle.
Interrupts sessions |
Dynamic DNS
w/cable or DSL |
|
Inexpensive monthly cost
Works with multiple ISPs |
|
No |
|
Interrupts sessions
Expensive equipment required |
