Chapter 2.ISDN Service
J2 (previously Generic Data J)
•2B service
•1B alternating voice/data, 1B data only
•Two directory numbers
M5 (previously Generic Data M-1DN)
•2B Service
•1B alternating voice/data, 1B data only
•One directory number
M5 is not available for services provided by Northern Telecom or AT&T switches.
12 | ISU 2x64 Dual Port ISDN Service Unit User Manual |
