180
SMG digital gateway
Device Configuration Example via CLI
Objective
Configure SS7-SIPT transit.
Source Data
A stream from the opposite PBX is physically connected to E1 stream 0 at SMG4.
SS7 Signalling Parameters
OPC=67;
DPC=32;
associated signalling mode, i. e. the same DPC for both MTP3 and ISUP;
signalling channel SLC = 1 in the channel interval 1;
CIC numbering from 2 to 31 for channels from 2 to 31 respectively;
channel engagement order—
sequential forward even
(respectively, to exclude mutual channel
engagement, the channel engagement order should be assigned on the opposite side, e. g.
sequential back odd
).
SIP-T Signalling Parameters
IP address of the communicating gateway—192.168.16.7;
UDP port for SIP-Т signalling reception of the communicating gateway—5060;
number of simultaneously allowed sessions—25;
packetisation time for G.711 codec—30 ms;
DTMF signal transmission during the established session according to RFC2833, payload type for
RFC2833 packets—101.
Routing
route to SS-7 by trunk group 0;
route to SIP-T by trunk group 1;
transition to SS-7 is performed by 7-digit numbers beginning from 6, 7, 91, 92, 93;
transition to SIP-T is performed by 7-digit numbers beginning from 1, 2, 3;
all SS-7 signalling messages are transferred by transit.
Configuration via CLI
SS-7 Signalling Configuration
SMG4>
config
// Enter the configuration mode
SMG4-[CONFIG]>
new linkset
// Create a new line group (linkset)
NEW 'LINKSET' [00]: successfully created
SMG4-[CONFIG]>
linkset
0
// Enter the linkset configuration mode
Entering Linkset-mode.
SMG4-[CONFIG]-LINKSET[0]>
chan_order
even_successive_forward
// Select the channel engagement order—sequential forward even
Linkset[0]. Set chan_order '6'
SMG4-[CONFIG]-LINKSET[0]>
DPC ISUP
32
// Define a code for opposite ISUP signalling point
Linkset[0]. Set DPC '32'
SMG4-[CONFIG]-LINKSET[0]>
OPC
67
// Define a code for own signalling point