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LOCAL INTERFACE REQUIREMENTS
Physical Interface
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•
•
ISDN service must be provided from one of the following CO
switches and protocols:
Switch
AT&T 5ESS
Northern Telecom DMS-100
Siemens EWSD
The interface provides the ability to allocate one dynamic (TEI)
per phone number.
Local Service
•
•
•
•
61200051L1-1D
ISDN Basic Rate Interface (BRI) line
U-interface reference point
2B1Q line coding
Bearer capabilities:
- Circuit mode voice service for speech and 3.1 kHz
audio.
- Circuit mode data service for 56 kbps and 64 kbps
unrestricted data.
Two simultaneous calls supported on the interface. Any mix
of speech and data bearer capabilities is supported for both
bearer channels on incoming and outgoing calls.
Service provided inside the LATA for the bearer capabilities.
Long distance access for the bearer capabilities to and from
the long distance providers of choice.
ISU 2x64 Dual Port ISDN Service Unit User Manual
Appendix F: Ordering ISDN Without IOCs
Protocol
Custom (5E6 or later software)
National ISDN-1
BCS-32 or later software (Pvc1)
National ISDN-1 (Pvc2)
National ISDN-1
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