1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

telnetting problem and a question

Discussion in 'General Cisco Certifications' started by kobem, Mar 20, 2007.

  1. kobem

    kobem Megabyte Poster

    791
    1
    50
    as you know , i have dsl modem and a phone line and a pc
    at home .

    but i can not telnet into my dsl modem and couldn't find
    the reason.


    i can telnet modem of my friend on remote but unable to telnet my own modem in local

    failure all time is like : "couldn't open a connection to the
    destination , connection failed port 23"


    why ?

    .......................


    and i wish get to use hyperterminal for
    calling my home phone


    and even i can not succeed this (there are many icons
    in telnet section(on the screen you gave a name for connection)
    but can't call my home phone.

    note : there are com ports for serial communication and
    tcp/ip winsock (i chose tcp/ip but from the icons
    i elect first one , it wants from me phone number
    but unable to connect phone at home why?
     
    Certifications: CCNA
  2. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    Telnet, like every other TCP/IP app, is a client/server thing. You can only use a telnet client to connect to a machine running a telnet server. Many domestic DSL modem/routers don't run such a thing, mostly for two reasons. 1) Telnet is not secure and 2) It's extra software that can be left off domestic stuff.

    Note that if you have a DSL modem *only* (i.e. no router) then it is even less likely that things like telnet servers will be available.

    Where are you when you want to connect to your phone? If you are not at home then entering the phone number for your home phone will enable you to connect to it. You must be using a dial modem (i.e. an old fashioned modem) for this to work.

    Trying to use TCP/IP to connect to a phone won't work with normal phones - it must be a TCP/IP phone (i.e. VOIP) for this to work, and then the same rules about whether a telnet server is running will apply.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  3. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

    19,136
    462
    374
    Lawn chair... check. [​IMG]

    Coke Classic... check. :morebeer

    Popcorn... check. :popcorn
     
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  4. mondos

    mondos Kilobyte Poster

    335
    4
    37
    I'm getting a touch of dejavoux if that is the correct spelling BBM.
     
    Certifications: A+
    WIP: N+, MCDST and finding a job!
  5. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    [​IMG]

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  6. Kraven

    Kraven Kilobyte Poster

    297
    3
    49
    ROFL! I think i'll join you.

    Kraven
     
    Certifications: Network+, MCSA, 70-680
    WIP: A+, 70-685
  7. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

    19,136
    462
    374
    Déjà vu, and I'm quite sure that this sort of thing will happen again... and again... and again. :)

    ...which is the opposite of "vu jàdé", which is the feeling that NONE of this has ever happened before! (--George Carlin) :P
     
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  8. mondos

    mondos Kilobyte Poster

    335
    4
    37

    I knew you'd clear that up for me.Thanks.
     
    Certifications: A+
    WIP: N+, MCDST and finding a job!
  9. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

    19,136
    462
    374
    I needed help to get the accent marks right. heeheehee
     
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  10. kobem

    kobem Megabyte Poster

    791
    1
    50
    if i am at home hbroomhall ? (about telnet)

    you said dsl modem is not about dialling. And my modem
    doesn't support telnet server ability

    but
    my friend's modem was usr dsl gateway and i achieved
    to telnet into it , how?

    if i had dial-up modem as in the pci card(fax modem)
    could i call my home phone while i am at home and from hyperterminal?
     
    Certifications: CCNA
  11. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    Because that is in fact a modem/router, and clearly has a telnet server running.

    Only if they were on different lines. Pick up the phone and dial your own number - you'll get the engaged signal (in most countries). Why? Because the phone is off the hook. You can't phone yourself if you only have one line!

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  12. kobem

    kobem Megabyte Poster

    791
    1
    50
    not much understood your last answer
    but thanks for your help

    can you look my discontiguous topic
     
    Certifications: CCNA
  13. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    Er - what wasn't clear?

    I don't know Cisco routing stuff - but I'm sure someone will be along who does.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  14. kobem

    kobem Megabyte Poster

    791
    1
    50
    you told me that i have to use dial up for phone call

    the reason for this would be that we plug into modem(pci slotted)
    from two input(one is for PHONE the other is for internet) ?


    .............

    i forgot something , on pc end we plug into phone input
    and internet input but the other end was how?

    for ex. (for internet from pc input) to line (of the wall) but they are different cables?

    (for phone from pc input) to where (to the phone)?

    ...............

    shortly i can not recall the physical on the phone and wall side?
     
    Certifications: CCNA
  15. hbroomhall

    hbroomhall Petabyte Poster Gold Member

    6,623
    115
    224
    Well, I did rather assume you have a standard telephone. What is sometimes refered to as a 'Plain Old Telephone System' 'phone. (POTS)

    Modems have two RJ11 ports for convenience. You *could* use a 'T adaptor' on your phone line, but if you lifted the phone while the modem is connected you would find the connection badly interfered with, and the line might drop. With the 'phone' socket on the modem there is a small relay that disconnects the socket when the modem is online. Which means that if you lift the phone it won't interfere with the connection.

    Phone cables are different in almost every country in the world. In the USA it is a RJ11 plug at each end. In the UK the wall socket is a different and unique design. In the rest of Europe all sorts of plugs are used.

    Er - I don't understand that at all!

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+

Share This Page

Loading...