I just like to know what is The difference on the router commands "Show Service-Module and Show Controllers T1" and when should we use those 2 commands. Why does Some routers have Show Service-Module command but no Show Controllers T1 or either the other way around. Thanks you so much...
show controllers T1 will display the information about the T1 serial card in the router.
show service-module will display the information about an internal CSU/DSU.