ADTRAN ISU 2X64 user manual Local Interface Requirements, Physical Interface, Local Service

Appendix F: Ordering ISDN Without IOCs

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:

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

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.

61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 129