Chapter3–InstallingSoftware
28 MultiVOIP®Voice/FaxoverIPGateways
SettingCallSignaling
TherearethreechoicesforCallSignaling:H.323,SIPandSPP,the–SSmodelsonlysupportSIPandthe–FX
modelssupportSIPandSPP,butnotH.323.Itisbesttoselectoneoftheseastheprotocoltobeused,rather
thanmixingthem.SinglePortProtocol(SPP)
isanon‐standardprotocolcreatedbyMulti‐Te chthatallows
dynamicIPallocation.Generally,thedefaultsettingsdonotworkformostusers.Ifnecessaryyoucanchange
individualparameters.Chapter4providesdetailsforallsettings.