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i found the issue. I was using a dual wic on the 2621xm and it didnt synch up right to the 3640. Once both ends used a single t1 card, it worked<br />
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thanks
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I am having difficulty connecting these two routers back to back, via a T1 cable. The hardware is a WIC-1DSU-T1= in each device. The problem is, I cannot get the line protocol to come up. <br />
<br />
The encapsulation is ppp on both ends<br />
Both ends are using esf framing<br />
Both ends are using a line code of b8zs<br />
Both ends have a clock source of line<br />
the 3640 has the &quot;no-dce-terminal&quot; command<br />
the 2621xm has a clock rate of 4000000<br />
Neither side has alarms that I can see<br />
<br />
The cable I made is correct, it works when connecting 2621xm to 2621xm and 3640 to 3640. It does not work when going from 2621xm to 3640. <br />

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I am having difficulty connecting these two routers back to back, via a T1 cable. The hardware is a WIC-1DSU-T1= in each device. The problem is, I cannot get the line protocol to come up. 

The encapsulation is ppp on both ends
Both ends are using esf framing
Both ends are using a line code of b8zs
Both ends have a clock source of line
the 3640 has the "no-dce-terminal" command
the 2621xm has a clock rate of 4000000
Neither side has alarms that I can see

The cable I made is correct, it works when connecting 2621xm to 2621xm and 3640 to 3640. It does not work when going from 2621xm to 3640. 


i found the issue. I was using a dual wic on the 2621xm and it didnt synch up right to the 3640. Once both ends used a single t1 card, it worked

thanks

connect 3640 and 2621xm back to back via serial?

I am having difficulty connecting these two routers back to back, via a T1 cable. The hardware is a WIC-1DSU-T1= in each device. The problem is, I cannot get the line protocol to come up. 

The encapsulation is ppp on both ends
Both ends are using esf framing
Both ends are using a line code of b8zs
Both ends have a clock source of line
the 3640 has the &quot;no-dce-terminal&quot; command
the 2621xm has a clock rate of 4000000
Neither side has alarms that I can see

The cable I made is correct, it works when connecting 2621xm to 2621xm and 3640 to 3640. It does not work when going from 2621xm to 3640. 


A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.