Linkcom 2000 DCME Product Presentation LINKCOM 2000 Digital Circuit Multiplication Equipment (DCME) Toll Quality Voice Compression System

Linkcom 2000 DCME Product Presentation Linkcom Introduction DCME (Digital Circuit Multiplication Equipment) Point-to-Point link voice compression equipment Multiplex up to 12 xE1/T1’s trunks into a single E1/T1 bearer Interfaces to standard switches, PBX and satellite modems For use with all forms of bearer circuits: satellite, wireless, terrestrial Toll quality voice Fax and data bypass Comprehensive built-in redundancy features

Linkcom 2000 DCME Product Presentation –360 channels using G.729 voice compression –1:N and 1:1 built-in redundancy –128ms tail, G.168 echo canceller –8 Kbps (G.729,G729b) voice compression –14.4 V.32bis Data and V.17 Fax (V.34 & V.90 supported in a 64K DS0 clear channel) –Remote code download, monitoring, and diagnostics –Both ITU and background sampled comfort noise generation –Facility to pass IP traffic over bearer System Overview

Linkcom 2000 DCME Product Presentation Switch Interface Requirements –Up to 12 x E1/T1 circuits presented from switch on G.703 interfaces –Telephony traffic must be in original 64Kbps per channel PCM format –ITU Group III Fax bypass – V.17, V.21, V.27ter, V.29 –Data bypass – V.22, V.22bis, V.32, V.32bis Linkcom Suitable Applications Bearer Interface Requirements –Single full or fractional E1/T1 output from Linkcom on G.703 interface to bearer link. Link Requirements –Must be a logical or physical permanent point-to-point circuit –Any form of bearer link suitable including satellite, terrestrial, microwave and fibre –Linkcom work in dedicated pairs over the link. Traffic presented to local Linkcom will be outputted on the corresponding outputs at the far end Linkcom –Linkcom is transparent to the switches Switch Linkcom 2000 DCME Switch Linkcom 2000 DCME E1/T1 #12 (G.703) E1/T1 #1 (G.703) E1/T1 #12 (G.703) E1/T1 #1 (G.703) Full / Fractional E1 / T1 (G.703) Point- to Point

Linkcom 2000 DCME Product Presentation LINKCOM 2000 Digital Circuit Multiplication Equipment (DCME) HARDWARE OVERVIEW

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Compact PCI Chassis –Industry’s most compact 360 channel unit (4U high) –Compact PCI with telecom standard H.110 TDM backplane –Dimensions 7”H x 19”W x 12”D

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Continued Fan Tray –System operating temperature: 0 to 50 Degrees C –System operating humidity: 95% non-condensing

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Continued Power Supplies –Universal power supplies 85–264V AC Input, Hz (Optional DC Input) –Hot swappable –Full (1:1) redundancy (current sharing) fitted as standard

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Continued Host Processor / Bearer Module –Single Host Processor module per unit, which always occupies Slot 1 in chassis –Provides M&C for unit plus master download FLASH storage for firmware –Controls redundancy switchover of optional 1:N TCEC module or 1:1 redundant chassis –Controls hot swap capability –Bearer interface G.703 E1/T1 120/75/100 Ohm firmware selectable –10/100 Base-T Ethernet interface for NMS (optional) connectivity or IP traffic “tunneling” –Local control via RS-232 or Telnet interface

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Continued TCEC (Trunk Compression & Echo Canceller) Module –2x E1/T1 (firmware selectable) interfaces per module –60 channels of voice compression, fax and data –60 channels of 128mS Echo Cancellation –Signaling pass-thru support (R1, R2, R2D, CAS) –1 to 6 TCEC modules (occupying slots 2-7) can be installed providing 2, 4, 6, 8, 10 or 12 E1/T1 inputs per chassis

Linkcom 2000 DCME Product Presentation Linkcom Hardware Overview Continued Redundant TCEC (Trunk Compression & Echo Canceller) Module –Optional extra TCEC module fitted in Slot 8 (same module as standard TCEC module) –Provides 1:N protection against failure of any other TCEC module –Calls in progress transferred automatically from failed card to redundant TCEC module –Failed module can then be replaced (hot swappable) with no effect to service

Linkcom 2000 DCME Product Presentation LINKCOM 2000 Digital Circuit Multiplication Equipment (DCME) REDUNDANCY FEATURES

Linkcom 2000 DCME Product Presentation Redundancy Features Power Supply (1:1) –Full 1:1 redundancy (current sharing) –Power supply units are hot swappable –Fitted as standard to all Linkcom 2000 Units FAULT CURRENT SHARING HOT SWAP CURRENT SHARING

Linkcom 2000 DCME Product Presentation Redundancy Features Trunk Redundancy (1:N) –Optional redundant TCEC module in Slot 8 –Host monitors all TCEC status and health –TCEC module hot swappable –Upon failure, Host switches failed module to TCEC in Slot 8 maintains all setup parameters for this board FAULT HOT SWAP TRAFFICTRANSFERREDAUTOMATICALLYTRAFFICRETURNEDAUTOMATICALLY

Linkcom 2000 DCME Product Presentation Redundancy Features System Redundancy (1:1) –Two identical chassis are used, one ‘On-line Master’ - the other ‘Standby Slave’ On-line MasterStandby Slave –Master and Slave monitor each other with elaborate voting algorithm and Master will yield control or Slave will seize control depending on failure conditions –Failure of power supply will result in automatic switchover –Removal of card assembly will result in automatic switchover MUTUAL MONITORING FAULT ALL TRAFFIC AUTOMATICALLY TRANSFERRED

Linkcom 2000 DCME Product Presentation LINKCOM 2000 Digital Circuit Multiplication Equipment (DCME) COMPRESSION CAPABILITIES & FUNCTIONALITY

Linkcom 2000 DCME Product Presentation G.279 8Kb fixed rate compression –8Kb voice compression using CS-ACELP –Compression ratio fixed at 8:1 –High quality speech with MOS (Mean Opinion Score) of 4.0 Compression Capabilities G.279b 8Kb with VAD variable bit rate compression –8Kb voice compression using CS-ACELP –Compression ratio dynamically variable from 8:1 up to 20:1 per channel –Typical aggregate compression ratio between 12:1 and 16:1 achieved across all channels –Only speech content of conversation encoded and transmitted by using VAD –VAD:- Voice Activation Detection (aka silence suppression) - extracts silence from conversations dramatically reducing bandwidth consumption of channel –High quality speech with MOS (Mean Opinion Score) of 4.0

Linkcom 2000 DCME Product Presentation Signaling –Signaling Pass Thru for ITU Number 5, 6, 7 and R2D –Other signaling supported via clear 64Kb DS0 channel assigned across bearer Functionality Data Bypass –Tone detectors used to identify data call –Data passed clear circuit without compression at required data rate –V.22, V.22bis, V.32 and V.32bis data connectivity –Higher data rates can be passed over a permanently assigned clear 64Kb DS0 on the bearer ITU Group III Fax Bypass –Tone detectors used to identify fax call –Fax passed clear circuit without compression at whatever data rate is negotiated by both fax machines –V.17, V.21, V.27ter and V.29

Linkcom 2000 DCME Product Presentation NMS (Network Management System) Features –Provides an easy-to-use GUI interface for configuring and controlling multiple Linkcom units –Controls Linkcom equipment using SNMP via 10/100baseT LAN interface –Performs equipment control, equipment monitoring and report generation –Runs on a basic specification Windows PC

Linkcom 2000 DCME Product Presentation Linkcom 2000 provides a high reliability, fully integrated compression solution –Provides Hot-swap features provided by Compact PCI implementation –Comprehensive built-in redundancy –Built-in 128msec tail echo canceller and comfort noise generator –Industry’s most compact 360 channel unit (4U high) –Up to 20:1 compression of voice channels at toll quality Summary Product suitable for any market requiring reduction of point- to-point trunking cost. –Satellite and terrestrial voice trunking –Cellular base station connection (MSC to MSC, BSC to MSC) –Private network connections

Linkcom 2000 DCME Product Presentation Address:Ericsson Componedex Limited Sherwood Place 155 Sherwood Drive Bletchley Milton Keynes MK3 6RT England Tel:+44 (0) Fax:+44 (0) Web: Contact Details