Is it ok to use SPA-4XOC3-POS-V2 replace SPA-3XOC3-ATM-V2?

[dimitry1001]

I have a ASR1006 and use "SPA-3XOC3-ATM-V2" module to connect SDH , I need to replace this module because of EOS , And I search CCW only find can find similar module "SPA-4XOC3-POS-V2" . Witch cisco doc , I can't find replacement of  "SPA-3XOC3-ATM-V2" , so can I use "SPA-4XOC3-POS-V2"  to replace "SPA-3XOC3-ATM-V2" ?

Attachment is running config

[Giuseppe Larosa]

Hello Dimitry101,

generally speaking POS interfaces are not equivalent to ATM interfaces at the same speed.

POS = packet over sonet is for point to point links and uses a much simpler L2 protocol you can see like a sync serial over SDH.

ATM interfaces are much more complex they use VPI/VCI and send ATM cells and can support PVCs and can be point to multipoint different PVCs lead to different remote routers.

Both use SDH at physical layer but they are quite different.

We should look if the new SPA can work as ATM interface

The general datasheet states the ATM SPA is in End of Sale

https://www.cisco.com/c/en/us/products/collateral/routers/asr-1002-router/data_sheet_c78-443175.html?dtid=osscdc000283

From there going to specific datasheet for the SPA 4 POS OC3 V2 sends me to the following link

https://www.cisco.com/c/en/us/products/collateral/routers/12000-series-routers/product_data_sheet0900aecd804dfd03.html

That describes only POS mode of operation.

You would need to move to a different WAN technology to use POS interfaces.

Hope to help

Giuseppe