> switchtype=national is National 2 > switchtype=ni1 is National 1 In the PBX world, NI1 is most commonly used for ISDN BRI NI2 is most commonly used for ISDN PRI (alaong with DMS, 5E, & 4E integration) I have yet to come across a telso switch that is NI3 compliant, not sure if the spec is even released -Matt