SEMS node installation

Install packages

# apt update && apt install sems sems-modules-yeti

Configuration files

/etc/sems/sems.conf

Add new node to the routing database using web interface [ System -> Nodes -> New Node ]. Use id of newly created node as value for node_id parameter

node_id
unique signaling node id.

Warning

You should create Node at web interface and use ID from web interface at node_id variable. See System->Nodes menu.

Replace <SIGNALLING_IP>, <MEDIA_IP> with correct values for your server :

general {
    daemon = yes
    stderr = no
    syslog_loglevel = 3
    syslog_facility = LOCAL0

    node_id = 8

    shutdown_mode {
        code = 508
        reason = "Test"
        allow_uac = true
    }
    #~ pcap_upload_queue = pcap

    media_processor_threads = 1
    session_processor_threads = 1
    #sip_udp_server_threads = 1
    #sip_tcp_server_threads = 1

    dead_rtp_time=30
}


signaling-interfaces {
    interface input {
        default-media-interface = input
        ip4 {
            sip-udp {
                address = <SIGNALLING_IP>
                port = 5061
                use-raw-sockets = off
            }
            sip-tcp {
                address = <SIGNALLING_IP>
                port = 5061
                connect-timeout = 2000
                static-client-port = on
                idle-timeout=900000
                use-raw-sockets = off
            }
        }
    }
}

media-interfaces {
    interface input {
        ip4 {
            rtp {
                address = <SIGNALLING_IP>
                low-port = 16384
                high-port = 32767
                dscp = 46
                use-raw-sockets = off
            }
        }
    }
}

modules {
    module "mp3"{}
    module "opus"{}
    module "wav"{}
    module "gsm"{}
    module "ilbc"{}
    module "adpcm"{}
    module "l16"{}
    module "g722"{}

    module "registrar_client" {}
    module "sctp_bus"{}
    module "http_client"{}
    module "session_timer"{}
    module "jsonrpc"{
        listen{
            address = 127.0.0.1
            port = 7080
        }
        server_threads=1
    }

    module-global "uac_auth" { }

    module "yeti" {
        management {
            address = 127.0.0.1
            port = 4444
            timeout = 60000
        }
        core_options_handling = yes
        registrations_enabled = yes
    }
}

routing {
    application = yeti
}

Warning

RPC allows shutdown SEMS node or make it non-operational. RPC interface should be secured by firewall to prevent connections from not trusted hosts. In YETI systems only two components should have ability to connect to RPC - WEB interface and yeti-cli console

Launch traffic switch

Launch configured traffic switch instance:

# service sems start

In case of errors it’s useful to use sems -E -D3 command which will launch daemon in foreground with debug logging level

Checks

Check if sems process exists and signaling/media/rpc sockets are opened:

# pgrep sems
29749
# netstat -lpn | grep sems
tcp 0    0 127.0.0.1:8090 0.0.0.0:*  LISTEN 29749/sems
udp 0    0 127.0.0.1:5061 0.0.0.0:*         29749/sems
raw 2688 0 0.0.0.0:17     0.0.0.0:*  7      29749/sems

Check logfile /var/log/sems/sems-main.log for possible errors