With the NEC SL2100 system, SIP trunks can receive incoming calls with Caller ID, place outgoingcalls, and transfer SIP trunks to IP, SIP, analog and digital stations, and across a network.Currently, however, SIP Centrex Transfer is not supported.If a common carrier supports SIP, the NEC SL2100 can connect the SIP Carrier and outgoing calls tothe PSTN (Public Switched Telephone Network) network and the common IP network using an NECSL2100 SIP trunk.ChassisSIP RegistrarSIP ProxyDNSSIPNAPTSIP CARRIERInternet /IP VPNPSTNSIP MultilineTerminalSIP UAFigure 7-1 Common IP Network using NEC SL2100 SIP Trunk3.1.1 SIP Trunking RequirementsThe following are required when using the SIP trunk on the NEC SL2100 system:• CPU-C1 software• VOIPDB (VoIP Daughter Board) Programming ConditionsThe following conditions apply when programming the NEC SL2100 system for SIP Trunking:• If entries are made in Program 10-29-xx for a SIP Server and the SIP Server is then removed or notused, the entries in Program 10-29-xx must be set back to their default settings. Even if Program10-29-01 : SIP Proxy Setup – Outbound Proxy is set to 0, the NEC SL2100 system checks thesettings in the remaining 10-29 programs.• SIP Multi-profile support is added. The simultaneous use of a SIP trunk interconnection and a SIPtrunk carrier connection or six SIP carriers at the same time is supported.Limitations:- Each profile requires a different number for every SIP trunk port set in PRG 84-14-06.- Six carriers must be connected using a single route. The system only supports one gateway.- Only one DNS server can be set for the SL2100 to connect to six different SIP Carriers.SL2100 ISSUE 1.07-2 SIP Trunking
