Dear Friends,


I had a question on the E1/T1 conroller port?  Previously we have a project
connecting for VoIP, we connect the E1/T1 port of 3810 router to the PABX
and serial port to the WAN

My question 

1)What is the difference between E1/T1 controller port and the serial port?
Do E1 need ip address to be configured?

2)Can we use E1 controller to connect to the internet service provider?

3)I heard of E1 link (2M) and T1 link (1.544M)  Does these two term related
to E1/T1 port of the router?  That's mean if we want to have E1 link speed
we got to use E1/T1 port to connect? Is that true??  Then What I should do
if I need a E3 link

4)What router model got E1/T1 controller installed except 3810

Tong

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