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Cisco serial ports aren't DTE or DCE. They go both ways. ;-)<br />
<br />
Whether a port is treated as DTE or DCE is dependent on the cable connected to the port. <br />
<br />
That said, in a typical scenario, serial ports on a router operate as a DTE port.
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Cisco serial ports aren't DTE or DCE. They go both ways. ;-)

Whether a port is treated as DTE or DCE is dependent on the cable connected to the port.

That said, in a typical scenario, serial ports on a router operate as a DTE port.

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DCE = Data Control Equipment<br />
DTE = Data Terminal Equipment<br />
<br />
so for example a PC is a DCE device and an attached Serial device is a DTE device.. <br />
<br />

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DCE = Data Control Equipment
DTE = Data Terminal Equipment

so for example a PC is a DCE device and an attached Serial device is a DTE device..



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As mentioned above it is dependent on the cable connected to the port.<br />
<br />
However to find out what is connected to, let's say serial 0/0, you can enter the command <b>show controllers serial0/0</b>.
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As mentioned above it is dependent on the cable connected to the port.

However to find out what is connected to, let's say serial 0/0, you can enter the command show controllers serial0/0.

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@PsychoFelix, I disagre &nbsp;with you: &nbsp;I've always had DCE as Data Circuit-terminating Equipment. &nbsp;This used to refer to the little black/beige/blue box the Telco install on your premises to terminate the wire (also called circuit) from them. &nbsp;I this case, the PC (or router using the Telco servoce) is the DTE, and the modem or NTU is the DCE.
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@PsychoFelix, I disagre  with you:  I've always had DCE as Data Circuit-terminating Equipment.  This used to refer to the little black/beige/blue box the Telco install on your premises to terminate the wire (also called circuit) from them.  I this case, the PC (or router using the Telco servoce) is the DTE, and the modem or NTU is the DCE.

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Oops, I was assuming you were using a Cisco device with my previous comment.
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Oops, I was assuming you were using a Cisco device with my previous comment.

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I wanted to know how I could tell whether a cisco router is a DCE or DTE device?<br />
<br />
<br />

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I wanted to know how I could tell whether a cisco router is a DCE or DTE device?




DCE or DTE device

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

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.