What is the successor to the cisco 2600 series routers ? I assume it's the 2800 series.
We need a basic router with serial interface for x.21 (wic-1t) capable of supporting E1 circuit, with basic static routing capability, and is rack-mountable. We'll select the 2801 if it is the successor to the 2600 series.
I would recommend skipping the 2801 and stepping up to the 2811. The cost difference is only $200-300 but the capabilities are worth it.
The 2801 ships with 128MB of DRAM and supports a maximum of 384. As always the low-end device in any product line is inevitably unable to upgrade to the latest greatest code after a few years for no reason other than a RAM shortage. In 4 years when we have a new product line out you'll still have that 2801 but are perhaps using it for another purpose. You'll want to upgrade it to support a new feature and will find that the new code requires a minimum of 512MB of RAM. You'll be SOL. That's just the way it always works. The 2811 ships with 256MB and can take up to 760MB.
On top of that the 2811 supports the use of a RPS and direct DC input if you need redundant power or if you need an alternate power source.
The 2811 gives you 4 fully-functional xWIC ports whereas the 2 of the
2801's ports are limited. One is for voice WICs only. The other removes support for HWICs. The 2811 has not such limitation and it also gives you many more upgrades options with the NM slot.
Basically you get a lot more bang for the buck with the 2811. The cost difference is marginal and well worth it. I wish Cisco would stop selling the 2801 to keep people from buying it. We, as a Cisco Partner, don't even suggest the 2801 as an option. We go straight to the 2811. I can think of a couple of cases where that was a major benefit to the customer when their needs changed a few months after deployment and they used their NM slot to meet the new requirements.