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DSI Signaling Server SGW Mode User Manual Issue 5
6.13.10 SNSLI – SIGTRAN Signaling Link Initiate
Synopsis
This command initiates a SIGTRAN link. A SIGTRAN link (SNLINK) provides an SCTP association to an
adjacent Application Server Process or Signaling Gateway specified by one (IPADDR) or two (IPADDR2) IP
addresses as well as the host (HPORT) and peer (PPORT) SCTP port. The user should specify the type of
SIGTYPE link (SNTYPE) and which IP end (END) the Signaling Gateway is acting as.
For M2PA, the SIGTRAN link is associated with a SS7 link by the C7SLI command.
For M3UA, a default SS7 mode (SS7MD) and network context (NC) can be specified. This allows the user to
designate an SS7 format and mode of operation to a link. If the user requires the SNLINK to exist in multiple
networks, the user should not specify a default network context nor an SS7 mode, instead they should
associate it with a Network Appearance using the SNNAI command prior to unblocking.
If two IP addresses are specified, the first IP address is used until it proves unreliable, in which case the
second IP address is used.
When SECURE is set to Y, the SIGTRAN link does not come into service on unblocking if it receives messaging
from a peer that has an IP address not associated with the SIGTRAN link.
Note: Normal operation for M2PA would be to set one end to client and the other end to server. The
signaling gateway provides the ability for both ends to operate as client; however in this case,
the SECURE parameter must be set to Y.
See Section 7.2, “Signaling Configuration” on page 137 for a more detailed description of SIGTRAN signaling
configuration.
Syntax
SNSLI:SNLINK=,SNTYPE=,IPADDR=,END=,[SS7MD=,NC=,]
[IPADDR2=,][HPORT=,][PPORT=,][SRTX=,][LABEL=,][SECURE=,];
Prerequisites
• The SIGTRAN link has not already been initiated.
• An IP address of 0.0.0.0 cannot be specified.
• The IPADDR, HPORT, and PPORT combination must not be the same as that of a previously configured
SNLINK.
• The END can only be Client (C) or Server (S).
• Both NC and SS7MD parameters must either be present or both parameters must not be present.
• The SS7MD associated with an NC cannot be different to a SS7MD associated with the same NC
anywhere else in the system.
• If the SNTYPE is M2PA, SS7MD, and NC cannot be specified.
Limitations
None
Attributes
CONFIG
Examples
SNSLI:SNLINK=1,SNTYPE=SGM3UA,END=S, IPADDR=193.112.111.123;
SNSLI:SNLINK=2,SNTYPE=M2PA,END=C,IPADDR=193.112.111.123,
IPADDR2=192.112.111.123;;