Configuring legacy protocols Configure Systems Network Architecture over IP (SNAIP)
Digi TransPort® Routers User Guide
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n If Shared Port is selected, the drop down list next to Shared Port specifies the SNAIP
instance that has sync port configured. When sync port sharing is enabled only one
SNAIP instance can currently own the sync port. Other SNAIP instances however can
share this sync port in the event that there is more than one terminal residing on a
multi-drop sync line. In this situation with multiple terminals, each terminal station will
operate a DLSw state independently of all other stations.
The SNAIP parameter Priority is the SNAIP instance to use when more than one is available;
the highest number being given preference.
For example, consider that 4 SNAIP instances to all share sync port 0. To do this, configure
SNAIP 0 in the usual way on PORT 0, then configure SNAIP instances 1, 2, and 3 to use
SharedPort and Sync Port from SNAIP0.
Use protocol
The protocol for the interface. Choose LAPB, SNA for SDLC or RAW for raw mode in which all L2
frames are transmitted and received. You can also choose RAW_NOHDR for raw mode with no
DLSw headers.
Allow this unit to answer calls
This setting is only relevant when the interface is set to ISDN. If this parameter is set to On,
the router answers incoming calls on the relevant LAPB session. To prevent the router from
answering incoming calls on this LAPB session set the option to Off.
Only accept calls with MSN ending with
This setting is only relevant when the interface is set to ISDN. This is the filter for the ISDN
Multiple Subscriber Numbering facility. By default, this setting is blank. When set to an
appropriate value with answering calls parameter above enabled, the router to answer
incoming calls only to ISDN numbers where the trailing digits of the called number match the
MSN value. For example, setting the MSN parameter to 123 prevents the router from
answering any calls to numbers that do not end in 123.
Only accept calls with sub-address ending with
This setting is only relevant when the interface is set to ISDN. This is the filter for the ISDN sub-
addressing facility. By default, this setting is blank. When set to an appropriate value, with
answering calls parameter above enabled, the router answers incoming ISDN calls only where
the trailing digits of the sub address called match the sub-address value. For example, setting
the Sub-address to 123 prevents the router from answering any calls where the sub-address
called does not end in 123.
Assume station exists (Do not send TEST frames)
When this parameter is enabled, TEST frames are not transmitted and the TEST response is
not expected. Instead, the router assumes the station exists and proceeds with the protocol as
if the DLSw has received the TEST response.
Toggle DCD output each time the DLSw protocol enters the DISCONNECTED
state
When this parameter is set to On, the DCD (Data Carrier Detect) output turns off briefly each
time the DLSw protocol enters the DISCONNECTED state. Any attached equipment that needs
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