Gateway digital loop carrier device

Abstract

A gateway digital loop carrier device accommodates an integrated access device accommodating as a subscriber at least one of a telephone, a modem and ISDN and implementing a TR-008 interface, executes an interface conversion between TR-008 and TR/GR-303, and connects the subscriber to a switch implementing a TR-303 or GR-303 interface.

1 . A gateway digital loop carrier device comprising: 
 an integrated access device side terminating unit terminating a transmission signal sent from an integrated access device accommodating as a subscriber at least one of a telephone, a modem and ISDN and implementing a TR-008 interface;    a demultiplexing unit demultiplexing the terminated transmission signal into DS0 signals;    a unit performing interface conversion of the demultiplexed DS0 signal from TR-008 to TR-303 or GR-303;    a TR/GR-303RDT unit based on TR-303 or GR-303 and having a plurality of subscriber ports for sending the interface-converted DS0 signal to a switch implementing a TR-303 or GR-303 interface;    a trouble detecting unit for detecting a trouble on a transmission path between said integrated access device and said gateway digital loop carrier device; and    a service state information converting unit for converting the detected trouble into subscriber service state information of which said switch is notified,    wherein said switch is notified of the subscriber service state information.    
   
   
       2 . A gateway digital loop carrier device according to  claim 1 , wherein said service state information converting unit, if the transmission path trouble is detected, sets in a stop state a service state carried on the transmission signal to said switch that is transmitted on the transmission path, and 
 said switch is notified of the service state information indicating the service stop state.    
   
   
       3 . A gateway digital loop carrier device according to  claim 2 , said trouble detecting unit detects a recovery from the transmission path trouble, 
 said service state information converting unit, when the recovery is detected, sets in an in-service state the service state carried on the transmission signal to said switch that is transmitted on the recovered transmission path, and    said switch is notified of the subscriber service state information indicating the in-service state.    
   
   
       4 . A gateway digital loop carrier device according to  claim 1 , wherein said service state information converting unit sets, to the subscriber service state information, a service state based on the setting by the user of said gateway digital loop carrier device.  
   
   
       5 . A gateway digital loop carrier device comprising: 
 an integrated access device side terminating unit terminating a transmission signal sent from an integrated access device accommodating as a subscriber at least one of a telephone, a modem and ISDN and implementing a TR-008 interface;    a demultiplexing unit demultiplexing the terminated transmission signal into DS0 signals;    a unit performing interface conversion of the demultiplexed DS0 signal from TR-008 to TR-303 or GR-303;    a TR/GR-303RDT unit based on TR-303 or GR-303 and having a plurality of subscriber ports for sending the interface-converted DS0 signal to a switch implementing a TR-303 or GR-303 interface; and    a subscriber cross connect unit for connecting, to a predetermined subscriber port, the DS0 signal from said integrated access device and the subscriber line accommodated directly in said gateway digital loop carrier device, wherein    said subscriber cross connect unit connects the DS0 signal and the subscriber line to a predetermined subscriber port on the basis of the setting by the user of said gateway digital loop carrier device.