Configure SIP Trunks
14
XN120 Voice Over IP Card Guide
11- Configure SIP Trunks
Changing the VOIPU trunks to SIP mode
It is necessary to change each VOIPU trunk to SIP mode by Program 10-03-01.
Note. When you enter Program 10-03-01 you will see the setting for Port 01 of Slot 01 which is always a Hybrid
extension port. So before you make any changes you must use the VOLUME
p
q
keys to scroll to the correct
slot number that your VOIPU card is plugged into, see below.
The 2OPBOX connected to the Main XN120 unit is assigned slots 5 and 6.
The 2OPBOX connected to the First XN120 expansion unit is assigned slots 11 and 12.
The 2OPBOX connected to the Second XN120 expansion unit is assigned slots 17 and 18.
Setting Global SIP Parameters
The XN120 has several system-wide settings that have to be programmed to enable SIP to work. These items
are located in Program 10-28.
Setting CODEC Options
The XN120 uses a CODEC (Coder/Decoder) to convert speech into IP packets. Industry standard CODECs
are used to allow interoperability between un-like devices. The choice of CODEC to use will depend on various
factors, including the type of data network, the amount of bandwidth available and the capabilities of connected
equipment.
The XN120 CODEC (called the “Audio Capability Priority”) is changed in PRG84-13-28 for SIP Trunk calls.
Note: The are many issues that need to be considered before implementing VoIP and it is highly
recommended that you consult the “NEC Infrontia Voice Over IP Reference Manual” (991451-5) before
attempting this.
The example configuration on Page 31 gives an example of the configuration required on a typical SIP Network
installation.
