DCE DTE Cable
fab62
-
brupala Posted messages 111104 Registration date Status Member Last intervention -
brupala Posted messages 111104 Registration date Status Member Last intervention -
Hello, I am a beginner in networking and I am starting classes to obtain the CCNA.
I would need clarification regarding DCE and DTE cables.
Apparently, if I understood correctly, these cables are used to connect two routers together (feel free to correct me if I'm wrong).
But why use this kind of cable?
Can't we simply use an RJ45 cable?
Are these cables still used, or are they outdated?
What are their advantages over RJ45 cables and why do we need to determine a clock rate?
Thank you.
I would need clarification regarding DCE and DTE cables.
Apparently, if I understood correctly, these cables are used to connect two routers together (feel free to correct me if I'm wrong).
But why use this kind of cable?
Can't we simply use an RJ45 cable?
Are these cables still used, or are they outdated?
What are their advantages over RJ45 cables and why do we need to determine a clock rate?
Thank you.
2 answers
Hi,
wow, you’ve gone deep into antiquities ...
already DTE or DCE, that only concerns the external interface of the router, that of the equipment it is connected to:
DCE if it's to a synchronous/asynchronous terminal or DTE if it's to a modem (itself DCE) synchronous or asynchronous.
Then there are the interfaces:
V24/V28 (RS232) or V35 or V11
even within these categories there are still variations, and in V24 also synchronous/asynchronous, but well, asynchronous is not the same type of port on a Cisco.
The clockrate parameter that configures the clock rate only exists on a DCE cable, which simulates a modem.
All of this is hardly relevant today where Ethernet has become the norm.
Asynchronous ports exist in RJ45, but they are limited to asynchronous; otherwise, there are sockets of another format (DB25, DB15, or 34 square pins in V35).
--
and ... There you go!
wow, you’ve gone deep into antiquities ...
already DTE or DCE, that only concerns the external interface of the router, that of the equipment it is connected to:
DCE if it's to a synchronous/asynchronous terminal or DTE if it's to a modem (itself DCE) synchronous or asynchronous.
Then there are the interfaces:
V24/V28 (RS232) or V35 or V11
even within these categories there are still variations, and in V24 also synchronous/asynchronous, but well, asynchronous is not the same type of port on a Cisco.
The clockrate parameter that configures the clock rate only exists on a DCE cable, which simulates a modem.
All of this is hardly relevant today where Ethernet has become the norm.
Asynchronous ports exist in RJ45, but they are limited to asynchronous; otherwise, there are sockets of another format (DB25, DB15, or 34 square pins in V35).
--
and ... There you go!