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B1 (previously Generic Data B)
•
•
•
Capability C (previously Generic Data C)
•
•
•
I2 (previously Generic Data I-1DN)
•
•
•
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)
•
•
•
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 .
61200051L1-1D
1B service
Data only
One directory number
1B service
Alternating voice and data
One directory number
2B service
Data only
One directory number
2B service
1B alternating voice/data, 1B data only
One directory number
ISU 2x64 Dual Port ISDN Service Unit User Manual
Chapter 2. ISDN Service
11
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