Max speed on a serial interface

[vincent-n]

I'd like to find out what is the maximum speed of the serial interface on a Cisco 1601 router. What command can I use to find this out? I've tried "show controllers serial 0" but it does not show me anything relevant. I've tried "show inter s0" and it shows default of 1.5Mbps.

On this note, I believe that:

1. Slow speed serial interface -> max 128Kbps

2. Nomal serial interface -> max 2Mbps or 1.5Mbps

3. High Speed serial interface -> 45Mbps????

Is there anything higher for serial interfaces produced by Cisco?

Thanks in advance for your help.

[konigl · Accepted solution]

I'm pretty sure the 1601's serial port is rated to a top speed of T1 (1.5-Mbps) or E1 (2.0-Mbps).

If you want HSSI to handle T3 or E3, you need to move to the 2600XM series routers as a minimum I think; probably better off looking at 3700 series routers for that.

Anything higher would be LAN speeds like Fast Ethernet or Gig Ethernet, or ATM OC-3c (155-Mbps), OC-12c (622-Mbps), OC-48c (2.5-Gbps).

Top speeds on interfaces from Cisco these days are 10 Gig Ethernet, and OC-192c (10-Gbps).

Hope this helps.