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Bingo! &nbsp;<br />
<br />
Thank you!
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<div class="content wysiwyg-content">
Hello-<br />
<br />
We have a Cisco 2500 series router with a CSU/DSU card that I have connected to the T-1 coming into the building. &nbsp;Initially we had no connection since the pairs were crossed at the demarc but that has been resolved.<br />
<br />
When I plug the T-1 into the router card the CD light comes on along with the transmit and receive lights, but after a minute or so the CD light goes off. &nbsp;<br />
<br />
Is this an indicator of a bad card or does the router need to be configured or since the remote T is in loopback I will not get carrier?<br />
<br />
Thank you!<br />
<br />
-Scott<br />

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Hello-

We have a Cisco 2500 series router with a CSU/DSU card that I have connected to the T-1 coming into the building.  Initially we had no connection since the pairs were crossed at the demarc but that has been resolved.

When I plug the T-1 into the router card the CD light comes on along with the transmit and receive lights, but after a minute or so the CD light goes off.  

Is this an indicator of a bad card or does the router need to be configured or since the remote T is in loopback I will not get carrier?

Thank you!

-Scott


CD light on Cisco router on new T-1 connection

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

Networking Protocols

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.