Whats the maximum bandwidth supported over a single serial interface?

[Keith Rance]

I have a customer who is telling me they are driving a single X21 port on a HWIC-2T at 4Mb using in Cisco 1841. I have had a quick look around Cisco's site but can't find anything to confirm or deny my customers claims.

Aggregating serial ports is common practice to achieve greater bandwidths but I'm unaware that these single interfaces can be driven at 4Mb, can anyone shed any light on these claims as to whether it’s even possible? and what the likley configuration detail would be?

[Ganesh Hariharan]

I
have a customer who is telling me they are driving a single X21 port on
a HWIC-2T at 4Mb using in Cisco 1841. I have had a quick look around
Cisco's site but can't find anything to confirm or deny my customers
claims. 
Aggregating
serial ports is common practice to achieve greater bandwidths but I'm
unaware that these single interfaces can be driven at 4Mb, can anyone
shed any light on these claims as to whether it’s even possible? and
what the likley configuration detail would be?

Hi,

Check out the below link about the HWIC-2T support for synchronus and Asynchronus speed support.

http://www.cisco.com/en/US/prod/collateral/modules/ps5949/datasheet_c78-491363.html

Hope to help !!

Ganesh.H

[Jerry Ye]

Not that I am aware of.

Question is does the ISP even allow them to push 4MB across?

Regards,

jerry

[vmiller]

X.21 is an interface standard. Here is a tidy little link on the physical interface and capabilities.

http://www.connectworld.net/x21.html

[Giuseppe Larosa]

Hello Keith,

>> I have a customer who is telling me they are driving a single X21 port on a HWIC-2T at 4Mb

one port of the two not both the other is not used.

Hope to help

Giuseppe

[k031077b1]

I saw somewhere that it actually does here is the link and what it says :

Q. Can the integrated services routers run four HWIC-2T all at 8 Mbps on every port?

A. Yes. The configuration is limited only by the total system throughput and the number of available HWIC slots.

Q. Which routers support these HWICs?

A. These HWICs are supported on the Cisco 1841 and the Cisco 1900, 2800,2900, 3800 and 3900 Series Integrated Services Routers.

Q. Are these HWICs supported on the Cisco 1600, 1700, 2600, 3600, or 3700 Series Integrated Services Routers?

A. No.

http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/high-speed-wan-interface-cards/qa_c67-490366.html

Seem to me like your customer is accurate.