Can I use Fast Ethernet in Cisco router as a WAN port?


I have one Cisco 1841 Cisco router,

The box contains one power code & manual only,

router contains 2 FE, 1 console & 1 AUX port integrated, (slot0 & slot1 is empty)

Now i need to connect this router with my LAN & WAN

WAN port will connect to one fiber optical device which support Ethernet port,

Pls suggest do i need to buy WAN modules for WAN connection or I can just use one of Fast Ethernet port as WAN port,

Awaiting for your earlier reply,

Many thanks in advance,
Who is Participating?
RPPreacherConnect With a Mentor Commented:
The integrated FastEthernet can work as WAN port.
Svet PaperovIT ManagerCommented:
WAN modules (WIC) for Cisco 1841 provide interfaces for different TELCO-type connections as T1/E1, ADSL, etc. If your WAN is Ethernet-based you don’t need a WIC and you can one of the Fast Ethernet ports.
dxbdxb2009Author Commented:
thanks RPPreacher & spaperov for your prompt replies,

my ISP is going to use HUAWEI's 100BaseT port no 1 as a WAN connection using CAT5 or CAT6 cable which should go to my Router's ethernet port...... here i want you experts to advice whether I can use my Fast Ethernet port as a WAN port in my 1841 router?

Kindly advice so i can open a new question for configuring it properly.

many thanks once again in advance,
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Svet PaperovIT ManagerCommented:
dxbdxb2009Author Commented:
i appreciate you quick replies...

could you be with me while i post new question while configuring this router?

I will post you the link for my new question....

dxbdxb2009Author Commented:
here is my new question regarding this router 1841

pls advice & reply,

many thanks once again
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