Cisco Systems IGX 8400 manual E1 Interface Back Card BC-E1

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Network Trunk Module

E1 Interface Back Card (BC-E1)

The E1 trunk interface card (BC-E1) provides an E1 trunk interface for the network trunk module (NTM). The BC-E1 connects directly to the NTM and can reside in any rear slot 3 through 8 in an Cisco IGX 8410, 3 through 16 in an Cisco IGX 8420, or 3 through 32 in an Cisco IGX 8430. The BC-E1 provides the following:

Interfaces to CEPT E1 lines (CCITT G.703 specification)

Support for both Channel Associated Signalling and Common Channel Signalling

Support for unframed 32-channel (2.048 Mbps), framed 31 channel (1.984 Mbps), or 30 channel (1.920 Mbps) operation, or any n x 64 Kbps rate down to 256 Kbps

Configuration of either full or fractional E1 lines

CRC-4 error checking

Support for HDB3 (clear channel operation on E1 lines) or AMI

Passes E1 line events (frame loss, loss of signal, BPV, frame errors, CRC errors, and CRC synchronization loss) to the front card

Detection of loss of packet sync when used with the NTM

120-ohm balanced or 75-ohm balanced or unbalanced physical interfaces

The BC-E1 supports two clock modes. The clock modes are normal clocking and loop timing. You select the mode through software control. With normal clocking, the node uses the receive clock from the network for the incoming data and supplies the transmit clock for outgoing data. The node can use the receive clock to synchronize itself with the network.

With loop timing, the node uses the receive clock from the network for the incoming data and redirects this receive clock to time the transmit data.

Statistics are kept on most line errors and fault conditions, including:

Loss of signal

Frame sync loss

Multi-frame sync loss

CRC errors

Frame slips

Bipolar violations

Frame bit errors

AIS, all-1’s in channel 16 (CAS mode)

Figure 4-24shows and Table 4-18lists status LEDs and connections on the BC-E1 faceplate. When you correlate the table and figure items, read from the top to the bottom.

4-40Cisco IGX 8400 Series Reference

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Contents Trunk Cards Trunk Interface Cards Trunk Front Cards Card Acronym Card NameTrunk Operating Modes Trunk Card MaintenanceLoopback Test Introduction to the UXM-E Trunk Mode Universal Switching Module EnhancedDetermining the UXM-E’s Mode of Operation Example Networks with UXM-EsUXM-E Trunk Features UXM-Es in a Network with Heterogeneous TrafficBack Cards for the UXM-E UXM-E InterfacesCard Name Card Description UXM-E Front Card Switchover to a Redundant UXM-E Maximum Number of UXM-EsCabled UXM-E Redundancy UXM-E Status LEDs Fail Active Standby Status of CardCard Mismatch Cellbus Bandwidth UsageUXM-E as a Clock Source Planning for Cellbus Bandwidth Allocation OC3Calculating Cellbus Bandwidth Changes ATM Across a Public ATM NetworkUXM-E in Trunk Mode Routing over Cell Trunks OnlyTypes of Supported Traffic Traffic from FastPacket-Based Cards Traffic TypeTypes of Connections on a UXM-E Trunk Inverse Multiplexing over ATM on IGX TrunksAdding an IGX Feeder Adding and Removing IMA Group Links Line RedundancyIMA Protocol Two-Segment ConnectionsRouting Feeder Connection Cell Endpoint a Endpoint B Type Gateway Type Routing Load TypeThree-Segment Connections Feeder Connection Cell Endpoint a Endpoint B TypeRT-VBR Gwtypenone ABR.FST GwtypenoneUXM-E Atfr Activation and Configuration of a UXM-E in Trunk ModeOC3 STM1 SMF 20Cisco IGX 8400 Series Reference Alarms for Physical Lines and Logical Trunks SCR and PCR Policing at Less than 50 CPS on UXM-EBXM IGX-UXM-ETrunk Statistics for Troubleshooting 10 PCR Policing Application ExampleSummary Statistics UXM-E Interface CardsConnector/Indicator Function Connectors and LEDs for SMF and MMF Back CardsOC-3/STM1 Back Cards 11 BC-UAI-4-155-SMF Faceplate T3 Back Cards 12 BC-UAI-2-155-SMF FaceplateConnectors/Indicator Function Connectors and LEDs for BC-UAI-6-T3 and BC-UAI-3-T3BC-UAI-6-T3 Faceplate E3 Back Cards 14 BC-UAI-3-T3 FaceplateConnectors and LEDs for BC-UAI-6-E3 and BC-UAI-3-E3 BC-UAI-6-E3 FaceplateT1 Back Cards 16 BC-UAI-3-E3 FaceplateBC-UAI-8-T1-DB-15 Faceplate E1 Back Cards 18 BC-UAI-4-T1-DB-15 FaceplateBC-UAI-8-E1 DB-15 Faceplate Port 21 BC-UAI-4-E1 DB-15 Faceplate 22 BC-UAI-4-E1 BNC Faceplate NTM Status Cable Redundancy for the NTMNetwork Trunk Module T1 Interface Card BC-T1 BC-T1 Faceplate Description23 BC-T1 Faceplate BC-T1 Connections and Status LEDsE1 Interface Back Card BC-E1 BC-E1 Connections and Status LEDs RX-TXSubrate Interface Card BC-SR Connection/Indicator Function BC-SR Connections and Status LEDsY1 Interface Back Card BC-Y1 RX MON BC-Y1 Connections and Status LEDsTX MON 46Cisco IGX 8400 Series Reference