LG ipLDK-60, Service Manual

Page 1: ...ipLDK 60 SERVICE MANUAL DIGITAL KEY TELEPHONE SYSTEM DIGITAL KEY TELEPHONE SYSTEM SERVICE MANUAL MODEL ipLDK 60 ...

Page 2: ...Limitations 10 2 2 SWITCHING 11 2 2 1 Back plane Architecture 11 2 2 2 Signaling Channels 11 2 3 ADMINISTRATION 12 2 3 1 General Description 12 2 3 2 System Generic Memory 12 2 3 3 Operating Memory 12 2 3 4 Customer Database Memory 12 2 3 5 System Resources 12 2 4 CALL PROCESSING 14 2 4 1 Internal Call Types 14 2 4 2 Outside Call Types 14 2 4 3 Conferencing 15 SECTION 3 CIRCUIT DESCRIPTION 16 3 1 ...

Page 3: ...uit description 74 3 6 5 Connector 75 3 7 MODU MODEM UNIT 76 3 7 1 General 76 3 7 2 Block Diagram Description 76 3 8 CMU50PR CMU12PR 77 3 8 1 CMU50PR Call Metering 50Hz and Polarity Reversal Detection Unit 77 3 8 2 CMU12PR Call Metering 12KHz and Polarity Reversal Detection Unit 77 3 8 3 Block diagram 78 3 8 4 Circuit description 79 3 9 VOICE OVER INTERNET PROTOCOL INTERFACE MODULE VOIB 81 3 9 1 G...

Page 4: ...STEM III 4 10 CMU12 50PR 199 4 11 PSU 200 SECTION 5 PART LIST 202 5 1 BKSU 202 5 2 EKSU 211 5 3 CHB308 218 5 4 CSB316 221 5 5 SLIB8 227 5 6 E1HB 231 5 7 RPHB8 238 5 8 VOIB 245 5 9 VOIU 249 5 10 VMIU 249 5 11 AAFU 250 5 12 CMU12PR 252 5 13 CMU50PR 253 ...

Page 5: ...g and voice switching utilizing a Pulse Code Modulation Time Division Multiplexing PCM TDM distributed switching matrix The system supports A law voice encoding rule based on the requirements of local regulations The ipLDK 60 system achieves a high level flexibility by 1 employing three kinds of option boards and 2 providing expansion system The KSU of ipLDK 60 is a wall mounted cabinet that house...

Page 6: ...EY TELEPHONE SYSTEM 2 1 1 System Connection Diagram ipLDK 60 system can be connected to several externals and internal line for call processing as following Figure1 1 1 System connection diagram Figure 1 1 1 System Connection ipLDK 60 ...

Page 7: ...bling KSU check the cable connection 6 When connecting the external battery check the polarity of batteries 7 When assembling KSU check the connection of protection parts and earth ground 1 3 System Features 1 Flexible architecture 2 Simplifying system structure 3 Powerful PC application via LAN Modem RS 232C 4 Stable Enhanced voice features 5 Simple installation efficient system management Remote...

Page 8: ...0dBm 600ohm Ring Detect Sensitivity 30Vrms 16 55Hz Frequency Deviation Less than 1 8 Signal Rise Time 5ms Tone Duration on time Min 50 ms Normally 100ms DTMF Dialing Inter digit Time Min 30ms Normally 100ms Pulse Rate 10PPS Pulse Dialing Break Make Ratio 60 40 or 66 33 Temperature 0 o C 40 o C Operating Environment Humidity 0 80 non condensing KSU 339mm W x 288mm H x 85mm D Dimension Expansion KSU...

Page 9: ...BU 4 LAN MBU VOIB E1HB8 3 MODEM Channel 1 MODU 1 Attendant Positions 5 System Intercom Links Non Blocking Paging All Call Internal 1 zone 5 zones Station Speed Dial 100 station 24 digits each 500 System Speed Dial 24 digits each 500 Last Number Redial 15 50 by admin programming 32 digits CO Line Group 8 8 Station Group 10 10 Conference 3 15 Party All ports are available Multi Conference 3 15 Party...

Page 10: ...CO 1DKT 7Hybrid ports PSU Power Supply Unit 90W Basic KSU VMIU Voice Mail Interface Unit 4 chs Other Option Boards 33 Kbps Modem 1 Port 3 CO 8 Hybrid 8DKTs 8SLTs MODU CHB308 CSB316 SLIB8 3 CO 16 SLTs 8 SLT Port 50Hz 12 or 16kHz Call Metering Unit Polarity Reversal Detection 3 chs CMU50PR 12PR Expansion KSU EKSU Expansion Key System Unit EMBU 3CO 8Hybrid ports Expansion Main Board Unit PSU Power Su...

Page 11: ...3 channels 3 CO Lines and 16 SLT Interface Board CMU50PR Call Metering 50Hz and Polarity Reversal Detection Unit 3 channels CMU12PR Call Metering 12KHz or 16KHz and Polarity Reversal Detection Unit 3 channels CSB316 SLU8 8 SLT Interface Unit Installed on CSB316 as a default SLIB8 8 SLT Interface Board Voice over IP Board 4ch VOIB VOIU Voice over IP unit 4ch E1R2 and 8 Hybrid Interface Board CO Lin...

Page 12: ...sal Detection Unit 3 channels CHB308 CMU12PR Call Metering 12KHz or 16KHz and Polarity Reversal Detection Unit 3 channels 3 CO Lines and 16 SLT Interface Board CMU50PR Call Metering 50 Hz and Polarity Reversal Detection Unit 3 channels CMU12PR Call Metering 12KHz or 16KHz and Polarity Reversal Detection Unit 3 channels CSB316 SLU8 8 SLT Interface Unit Installed on CSB316 as a default CO Line and E...

Page 13: ...r the same link There is a unique time interval for the transmission of each channel Each channel is sometimes referred to as a time slot These time slots are paired that is there is a transmitting and a receiving time slot for each channel The transmitting time slot is connected to a receiving time slot and a receiving time slot is connected to a transmitting time slot to form a full duplex commu...

Page 14: ...sed by the micro processor on MBU The micro processor processes requests and sends system status and commands by digital terminal signaling logic in the GSL12 block to the phone Digitized voice information sent on the B channel is routed to ACT2 on the MBU for switching and gain control The MBU switches the information to a receive B channel and informs the receiving terminal on the system such as...

Page 15: ...ltiplexed format Time division multiplexing creates channels or time slots that carries digitized voice signaling data and High Level Data Link Control HDLC protocol information Voice B channels carry digitized voice signals Signaling D channels are employed for channel specific signaling implementation B Channel Allocation The Main Board Unit MBU determines which time slot on which ISC highway wi...

Page 16: ...is occurred and it is always initialized on system power up 2 3 4 Customer Database Memory The third type of memory is called Customer Database memory This memory is stored in RAM Random Access Memory and is used to store the data and status of programmable features e g line ring assignment Customer database memory is maintained during power failure by an onboard lithium battery It is the customer...

Page 17: ...l communication standard RS 232C that is implemented by the first UART of CPU It provides asynchronous serial communications up to 19200 baud rates A log on procedure is used to enter the system terminal programming mode and ASCII characters and control codes are used to modify the customer database The 9 pin RS 232C port is configured as Data Communication Equipment DCE Data is transmitted on pin...

Page 18: ... database programming When a station places a page request the MBU must check scratch pad memory at first to determine if the page zone is busy Then the customer database programming must be checked to determine if the station is allowed to initiate a page and to determine which stations are to receive the page Stations that are not busy when the page was activated will be placed in the off hook m...

Page 19: ...ystem Since the system is designed to provide up to 3 parties in a conference the switching block on the ACT2 was incorporated to provide this function The digital summation process can store its output into this function The digital summation process can store its output into this conference memory of switching block The memory is large enough to support many digitally stored summations The summe...

Page 20: ...contact an internal MOH an external MOH an external PAGE an alarm sense and the master clock generation circuit as well as system s PCM voice processing circuit that has custom switching device ACT2 for PCM tone generation and PCM Gain control And it also has various connectors to install CO extension and function boards switches modular jacks and etc Basically the MBU provides the capacity of 3 0...