I2 Line Provisioning--ISDN Ordering Codes (IOC)--(previously 'Generic Data I_1DN')ISDN Ordering Codes (IOC) allow customers to order, via a simple code, pre-configured packages of ISDN features and services.
-Data only on each B channel,
-One directory number.
I2 is not available on the Northern Telecom (DMS-100) switch. Two directory numbers are required for 2B operation; in this case use J2.