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Chapter 2. ISDN Service
61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual
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B1 (previously Generic Data B)
• 1B service
• Data only
• One directory number
Capability C (previously Generic Data C)
• 1B service
• Alternating voice and data
• One directory number
I2 (previously Generic Data I-1DN)
• 2B service
• Data only
• One directory number
I2 is not available for services provided by a Northern Telecom switch. Two
directory numbers are required for 2B operation. In this case, use
Capabil-
ity R.
J3 (previously Generic Data J-1DN)
• 2B service
• 1B alternating voice/data, 1B data only
• One directory number
J3 is not available for services provided by a Northern Telecom switch. Two
directory numbers are required for 2B operation. In this case, use
J2
.