X25AM Configuration and Management Manual

X25AM Configuration and Management Manual—523424-004
D-1
D Using the NETID Modifier
X25AM provides the NETID/REMOTENET feature to specify a set of network
characteristics.
Historically, these sets were given network-specific names such as DATAPAC,
because they pertained to only one network. More recently, however, more general
names are used because each set can now pertain to more than one network.
A list of set names follows. Full descriptions are given later in this appendix:
NETID is used with lines and REMOTENET with subdevices. However, they both refer
to the same set. For example, if X25 is appropriate for a network, the value for NETID
and REMOTENET is X25.
You specify REMOTENET if you want a different set of network conventions to be used
for call request packets from a particular subdevice. If you do not specify a value for
REMOTENET, the same set of networking conventions is applied to both incoming and
outgoing calls.
Whether you actually use special port numbering, default PAD parameter values, or
network-dependent requirements from a set depends on which of the above-listed
NETID or REMOTENET names you specify.
NETID is both an X25AM I/O process modifier for SCF ADD DEVICE and ALTER
DEVICE commands to the WAN subsystem and an line attribute for the SCF ALTER
LINE command to the X25AM subsystem; REMOTENET is an SCF subdevice (ADD
SU, ALTER SU) attribute only.
The following definitions are used in the tables in Detail-Set Specifications on
page D-3:
•
An incoming call (DCE to DTE) is a maintaining call.
•
An outgoing call (DTE to DCE) is a call request.
•
The called (remote) address is SU DESTADDR + SU PORT NUMBER.
•
The calling (local) address is LINE SRCADDR.
If the remote DTE address includes a port number, you configure it as the last digits of
SU DESTADDR.
LINE SRCADDR is the format the network specifies for incoming calls. In many cases
this can be DNIC + NTN (network terminal number).
Addresses are defined in terms of SCF attributes.
DATANET DDXP TWINET X25NP
DATAPAC PSS TYMNET X25SA
DATEXP TELENET UNINET X25UD
DDN TRANSPAC X25 X25XA