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Appendix F: Ordering ISDN Without IOCs
61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 129
LOCAL INTERFACE REQUIREMENTS
Physical Interface
• ISDN Basic Rate Interface (BRI) line
• U-interface reference point
• 2B1Q line coding
ISDN service must be provided from one of the following CO
switches and protocols:
The interface provides the ability to allocate one dynamic (TEI)
per phone number.
Local Service
• 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.
Switch Protocol
AT&T 5ESS Custom (5E6 or later software)
National ISDN-1
Northern Telecom DMS-100 BCS-32 or later software (Pvc1)
National ISDN-1 (Pvc2)
Siemens EWSD National ISDN-1