Reverse Polarity Support

 

Quest  NT-1 Plus is a NT1 Plus type of connector that has two built-in analog ports to allow direct hookup to the analog telephones from an ISDN line. Users will enjoy the benefits of high-speed ISDN services while they can still keep their existing analog telephones and fax machines.


Feature:

• Conforms to ANSI and ETSI network and terminal interfaces
• Compatible with 2B1Q basic rate services and standard ISDN terminals
• Provides 2B+D ISDN basic rate service
• Provides point-to-point and point-to-multipoint connections
• 2 POTS ports connected to analog or G3 fax machine
• Supports ISDN Supplementary Services (D channel: DSS1)
• Local functions include internal POTS call, transferring POTS external call to another POTS phone Connects to one POTS or one ISDN phone at remote power condition

Specification:

Network Interface(U Interface):

• Line Code: 2B1Q, ITU-T G.961, ETR 080, ANSI T1.601
• Startup Link Time: Cold start - 3 seconds typical; warm start – 110 milli -second typical
• Termination Resistance: 135 ;distance range: > 5.5 kilometers
• Switch Compatibility: EURO ISDN DSS1
• Connector: RJ45
• Reverse Polarity for analog ports

S/T interface:

• Line Coding: AMI code, per ITU-T I.430
• Termination Resistance !G Selectable: 100 or 50?
• Bus connection: Point-to-point, short passive bus, extended passive bus
• Connector: RJ45
• Power source: Output voltage at S-interface: 42V

Power Feeding to the S-bus: > 4 W in normal operation with local power > 460mW in emergency operation

 

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