in analog voice port, FXS-DID are famous.
You can also refer the link
you can also refer the link
DID is a basically a service which is offered by TELCO and same needs to be supported on Voice cards.
on these cards , you have voice ports and not ethernet ports.
Cisco IP phones need to be connected to switch.
Thanks for your reply Chintan.
And this would apply to a small business using Cisco phones and routers if they wanted to use this method too then?
ports can be used as FXS or DID,
if you are planning to use them as FXS then you can attach fax or telephone or both.