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cisco console cable with multiple outputs

Posted on 2013-05-31
Last Modified: 2013-06-14
Hi Guys
in past i come across console cable (or serial cable) i cannot remember which have one serial connection to commuter and multiple out to cisco  console(or serial )  .Cable was separated with some small special box and i could connect from one computer to multiple cisco devices .With CRT i can have multiple connection open at one time but i cannot remember what was the name of the cable search internet did find nothing.
Question by:homolama
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LVL 50

Accepted Solution

Don Johnston earned 214 total points
ID: 39210630
LVL 20

Assisted Solution

netcmh earned 72 total points
ID: 39210647
LVL 18

Assisted Solution

Akinsd earned 143 total points
ID: 39211032
What you need is an Asynchronous Server and Cable.

You will install the Asynchronous Card on your Cisco gear and connect the cable to the SCSI connector, then the RJ45 ends to other gears.

You will also need to configure the tty lines, usually starts from 2033 depending on model
Assuming your asynchronous server has an ip of
and Also asuming that your tty lines starts at 2033

your config will include the following
ip host host1 2033
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Author Comment

ID: 39211034
sure it was similar to DB9 but it was one serial from computer to 8 console connection to cisco switches and i can log to any of them . it is not a monitor switch at all . any way thanks . hope some one come across such i cable .
LVL 18

Assisted Solution

Akinsd earned 143 total points
ID: 39211037
You need the combination of

Cisco NM-16A server module or Cisco NM-8A (not common)


Here is an example from my async server

R1.2FE.3SE.AS#show run | in host
hostname R1.2FE.3SE.AS
ip host R0C 2037
ip host SW0C 2033
ip host SW1C 2034
ip host SW2C 2035
ip host ASAC 2036
ip host host8 2040
ip host host9 2041
ip host host10 2042
ip host host11 2043
ip host host12 2044
ip host host13 2045
ip host host14 2046
ip host host15 2047
ip host host16 2048
ip host R0A 2038
ip host R1C 2039

To connect you just toggle between the devices
type host12 and press enter to access device connected to port  2044 (using my example above)
to switch back to the server, you would use Ctrl + Shift + 6 and x

See this link for ebay search on asynchronous server.
let me know if you need help configuring it

LVL 50

Assisted Solution

by:Don Johnston
Don Johnston earned 214 total points
ID: 39211094
It sounds like what you're looking for is a multiple port serial card.


You can get these with different cable options.

Google "multiport serial card server" and you'll see lots of choices.

Author Comment

ID: 39211318
ok guys we are getting close thanks for all your replies . it was like Cisco 2509 2511 2600 NM-16A Octal Cable CAB-OCTAL-ASYNC  but no internal  card involved , instead there was some small device and i have been connected to laptop .so the connection was something like this laptop usb to serial converter - serial to small device - small device to octal cable - into cisco devices . thanks very much for all your replies.
LVL 50

Assisted Solution

by:Don Johnston
Don Johnston earned 214 total points
ID: 39211364
LVL 45

Assisted Solution

by:Craig Beck
Craig Beck earned 71 total points
ID: 39211408
Something like this...


You connect 4 serial devices to it and you can telnet/SSH to the box on a certain port number to connect to each device.
LVL 20

Expert Comment

ID: 39248864
Thanks for the grade. Good luck.

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