I have a cisco 1721 modular router.it had 1 serial wan interface and 1 modular slot for fixing another serial wan
inetrface and 1 ethernet port(RJ 45)i want to fix multiple ethernet ports (interface) into the modular slot(which is
for serial interface) can it possible to fix multiple ethernet ports into modular slot if i can fix it then from where
i can get this multiple ethernet portport(RJ 45).
thankx alot in advance.