Rudderow, Evan ([log in to unmask]) wrote:
: Robert Manocchia <[log in to unmask]> asked:
 
: >I have a DTC 72MX with an Arpa Telnet Express card handling telnet
: >access to an HP3000/937 running MPE/IX 4.0.
: >
: >Does anyone know how the tcp port numbers are assigned to incoming
: >telnet to the 937  ??
 
: Eero will no doubt reply with the telnet port number; in any event , the
: question doesn't apply in this instance -- the Telnet Express Box (or Telnet
: Access Card) converts telnet into AFCP, so the access is through the AFCP
: port number.
 
:  -- Evan
 
- Since requested...  yes, Evan is right, the telnet port number does not
  apply (on the hp3000).  Telnet port #23 is open and listening in the DTC
  72MX's Telnet Express card.  Whenever a connection is made to this port,
  it'll lookup the host one needs to be connected based on it's tables
  configured on DTCMGR (IP-address to host mappings).  Once the host name
  is known, the DTC will open an AFCP/ADCP connection to the HP3000 and
  as such the telnet connection to the DTC is 'piped' to the AFCP connection
  and vice versa.  The DTC/TAC card acts as a protocol coverter between telnet
  and AFCP/ADCP.
 
                                    DTC-telnet             HP3000 MPE/iX
    telnet-client                    "mirror"
        \                         telnet  ADCP                ADCP
        tcp                      tcp       AFCP              AFCP
          ip                    ip          IEEE802.2       IEEE802.2
           ethernet      ethernet            IEEE802.3     IEEE802.3
              ...............                   ++++++++++++++++
 
 
Hope this helps,
Eero - HP CSY Networking lab, NS services.