Carrier Access Access Navigator EOC Interface, Remote Digital Customer Premises Terminal RDT

EOC Interface

Overview

Overview

The Access Navigator GR-303 complies with Telcordia® (Bellcore) standard GR-303. This specification describes a Digital Loop Carrier (DLC) system that operates on T1 circuits. GR-303 management uses an Embedded Operations Channel (EOC) enabling the local switch to provision GR-303 resources in the Access Navigator. The local switch uses the Timeslot Management Channel (TMC), a dedicated DS0 channel, to set up cross-connects in the Access Navigator on a per-call basis, providing call concentration and more efficient use of switch and facility resources.

				Voice		PBX
			Voice	Lines			Stations
			and
			Data				Key System
	GR-303	Drop		V.35, T1			Fax
						Ethernet
		DS1s		or DSL
	Voice &
	ISDN BRI	Switch	Access Bank		Router
	Data
		DS1s		P-Phone			P-Phones
			Voice
							(EBS)
			and				Key System
	GR-303		Data	FXS/FXO
							Fax
	Interface
Local	Group	Access		VoIP		PBX	Stations
			ADIT 600
Digital		Navigator		T1 Drop
Switch

Adit 600 10/100BaseT

RS232 Modem

Integrated Digital Terminal (IDT)

		DDS
		ISDN BRI
		T1 Drop	Router Ethernet
		V.35
Remote Digital	Customer Premises
Terminal (RDT)

Figure A-1. GR-303 Architecture with the Access Navigator

In the GR-303 network architecture (see Figure 1), the local switch is called the Integrated Digital Terminal (IDT). The IDT connects to an intelligent Remote Digital Terminal (RDT), such as the Access Navigator. Between the IDT and RDT, management and voice traffic flow over an Interface Group (IG) comprising two or more T1s (DS1s). Dedicated DS0s in the IG carry the EOC and TMC. The remaining DS0s carry voice frequency calls assigned by the switch.

Services defined on the EOC interface allow remote management of GR-303 resources in the Access Navigator. GR-303 services are modeled by managed objects, which represent physical resources or support

A-2 August 2003 Access Navigator - Release 1.8