Zhone Technologies Network Device manual Data Backup and Bandwidth on Demand, 25bis/DTR, Dialing

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Zhone Technologies, Inc.

IMACS Product Book, Version 4

 

 

Figure 26—IMACS Using SINA for ISDN and Leased Line Traffic

Data Backup and Bandwidth on Demand

The IMACS with a PRI server is used to back up data networks in the event of a circuit outage. In the example shown in Figure 27, an IMACS is used to connect a router to a leased line circuit. The PBX is using the IMACS equipped with a PRI server card to connect to the PRI circuit. In normal operation, both the voice traffic and the data traffic simply pass through the IMACS. In the event that the leased line circuit is dropped the router will sense the loss of data and attempt to dial bandwidth via its second line. This second port can be configured on the IMACS to accept dial commands using the V.25bis, or to dial a pre-determined number when the IMACS senses DTR. When the router senses that a failure has occurred, it will request bandwidth from the IMACS. If the PRI does not have enough bandwidth to satisfy the router’s request, the IMACS rejects the call. The router will then request another call with smaller bandwidth requirements and will monitor the original leased line for presence of data. When the router detects that the leased line is back in operation, it will switch its transmission path back to its original state, and drop the ISDN connection.

This configuration is utilized to provide bandwidth-on-demand during peak utilization times such as nightly backups. With this application, the PBX utilizes the PRI bandwidth on a call-by-call basis during the day, and the router utilizes the leased line. At a pre-determined time-of-day, the router would request all or the majority of the PRI bandwidth. The router utilizes both the leased circuit and the ISDN circuit for a set period of time. For example, the PRI line would be used during the day to carry the voice calls, at night the PRI line would be used to increase the bandwidth available for the nightly computer systems backup. The router routes packets over both the leased line and the PRI line until the backup was complete. At that time, it would disconnect the PRI call.

PRI

IMACS

PBX

T1/E1

T1/E1 Backbone network

T1/E1

IMACS

PBX

V.25bis/DTR

PRI

 

V.25bis/DTR

PRI

Dialing

Dialing

 

 

 

Router

 

 

Router

 

 

 

 

 

ISDN

 

 

 

Network

 

Figure 27—IMACS Using A PRI Server Card For Data Backup

March 2001

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Contents Imacs Product Book Intentionally Left Blank Table of Contents Internet Protocol Router Low-Bit Rate Voice Server Imacs System Testing and DiagnosticsSection Title Server Cards Management Channel Concentrator MCCImacs Product Overview Imacs Features and Benefits Imacs System Bus Architecture Imacs Architecture OverviewWAN CPU WANWAN Buses User BusesInterface Card Server BusesCard Type Summary CPU CardServer Card Power Supply RedundancyVoice Card Data CardSystem Synchronization and Clocking CPU Card RedundancyWAN Card Redundancy Adpcm RedundancyMCC MIB Imacs System ManagementNetwork Frame RelayT1/E1 Frame Relay Imacs Management Using FDL/SA4Router Each FDL is mapped to a separate DS0 FDL over ESFImacs 38.4 kbps Slip Terminal Server Concentrator Node Page M card with 2713 Hz Loop back Module# Imacs 800 Universal Enclosure Imacs 800 Universal Enclosure-Front ViewImacs 900 Universal Enclosure Imacs 800 Universal Enclosure-Rear ViewImacs 600 Front Load Enclosure Imacs 900 Universal EnclosureImacs Dimensions Chassis Height Width Depth Model Physical and Environmental CharacteristicsImacs Minimum Clearances 600 800 900 Power SuppliesImacs Compliance With Regulatory Standards Model 8903 Power Supply 120 VAC Model 8908 Power Supply, 105/240 VAC Model 8905 Power Supply, 120/240 VACRing Generator Page CPU Cards Maximum number of WAN links LED IndicatorsOperational Modes Code StorageInterface Cards Page YES Interface Card SpecificationsWAN Ports Node Port DOC CS03 EIA RS232-CPage Performance and Test Options T1 Signal FormatE1 Signal Format HDB3Etsi ETR WAN Card Hardware SpecificationsForeign Exchange Station FXS Card Specification Short Loop Long LoopVF Transmission Transhybrid Loss CharacteristicsForeign Exchange Office FXO Card PCM CodingVF Transmission Characteristics M Card Delay Specification Universal Imacs P-Phone Application Phone Station and Office Line CardsVoice Transmission Status IndicatorsSubscriber and Central Office Interface-Transmit Channel Sealing Current Sink 2W Port CharacteristicsKHz Signaling Specifications Sealing Current SourceTR-008 Application Voice Channel Bank ApplicationT1-E1 Conversion Imacs Using TR-008Data Card Types Type of Card Description Imacs Data Modules and ApplicationsData Card Types Page Imacs and HSU Application Example HSU CardApplications CAD/CAMPoint to MultiPoint One-Way Video and Audio Using HSUs Performance Statistics Dial CapabilitySRU Card Imacs Standards Compatibility SignalingSynchronous Data Asynchronous DataFrad Card Imacs Frad Card Application Imacs w/ FradDlci Frad Card SpecificationsDiagnostics Model 823160 Frad CardOCU-DP Card Models OCU-DP CardPage Model Number Number of Ports Physical Interfaces OCU-DP SpecificationsImacs BRI Terminal Extension Application BRI CardBRI Card Models Imacs BRI Card In a Leased Line or Idsl ApplicationPage Software Configurable Options Remote NTU Configuration OptionsProcedural Characteristics Model 8262 manual settingsLult Lunt BRI Card SpecificationsOff or On per port Models 826361 and 826171 only Design Standards for ModelBnR IP Concentrator Card Imacs Using the 822860 For Network ManagementInternal Ports B7R IP Concentrator Card Specifications External PortsPortMaster Integrated Office Router PM-IOR Options portUDP, Icmp Technical SpecificationsTCP/IP, IPX Alarm Cards Model 8403 Buzzer Alarm Card Specifications Model 840160, 840260Adpcm Voice Compression Server Ports 840160 840260 840360T1/E1 PBX-to-PBX Trunk ApplicationBRI-U BRI-ST Automatic Call Distribution ApplicationWireless Base Station Application Imacs In a Wireless Base Station ApplicationIsdn Primary Rate Interface PRI Server Adpcm Server Card SpecificationsRemote Login Nfas Non-Facility Associated SignalingIsdn Video Conferencing and Video Broadcast Switch 23B+D on T1 30B+D on E1 Customer 3 5B+DFractional PRI Provisioning Customer 1 10B+D 7B+DCodec Video T1/E1 Integrated Isdn Access with SinaVideo Dialing Router Data Backup and Bandwidth on Demand25bis/DTR DialingPRI to FXS Termination Local Routing Routing Capabilities Call RoutingAlternate Routing SwitchDefault Bi-directional Default RoutingDpnss Trunk Routing Management Channel Concentrator MCC ServerMCC In a Multilevel Concentration Application ACS-FRS Advanced Communication Server Frame Relay Server Frame Relay Server SpecificationsFECN, Becn Frame Relay Switch Port Savings Frame Relay Access and Concentration ServerFrame Relay and Internet Service Provisioning Imacs Using Frame Relay Server CardsIdsl Service Provisioning Frame Relay and Internet Services Using IMACS’ Frad ServerGrooming and Concentration in Cellular Networks Idsl Service ProvisioningFrame Relay DS1s Mobile Switch Office Channelized DS1s = 96 DS0sFrame Switch Mobile Base StationFrame Relay Concentration at Corporate Headquarters Legacy Adaptation to ATM Interactive Distance Learning/Tele-Medicine Migrating Legacy Networks to ATMInteractive Distance Learning Application ATM Server SpecificationsCBR, VBR ATM Server Card SpecificationsATM I/F ON/OFFStandards Support Internet Protocol RouterMaximum Byte Size Snmp SupportIPR-3 Uses of IPRApplication Ethernet LAN IPR-2Private Intranet Deployment Bundled Service DeploymentIP Routing Server Specifications Private Intranet Deployment Using IP Routing Server CardUNI DCE, UNI DTE, NNI IP Routing Server Card SpecificationsMTU Call Center Application Backhauling Voice Application Lbrv In a Call Center ApplicationNX64K Leased Line T1/E1 Extending Voice Access ApplicationSwitch T1/E1 Central VoiceMail Server T1/E1Port Status Summary Password ProtectionLetter Meaning Imacs System ParametersIntegral Test Capabilities Imacs Diagnostic Capabilities Status and Alarm ManagementIn-Band Loop back Code Detection WAN DiagnosticsBit Error Rate Tester Bert Patterns Supported In-Band Loop back Code GenerationStatistics Gathered By Bert Voice DiagnosticsDiagnostic Capabilities of Voice Ports Bert DirectionDiagnostic Capabilities of Data Ports Data DiagnosticsControl Lead Handling 64Kbps Nx64Kbp Toward WAN1 Yes Toward WAN2 Systems Equipped With Cross-Connect OptionData SingalingTones Supported Voice Single Data Super-rate Without Data Singaling64Kbps Nx64Kbp Bert Direction Voice Single Data Super-rate WithoutToward WAN Voice Single Data Super-rate Without Benefits of Built-In DiagnosticsBuilt-In Diagnostics Example T1 Line Performance Monitoring Imacs Performance MonitoringConclusion DDS Line Performance MonitoringFrame Relay Performance Monitoring ATM Performance Monitoring