General DataComm TMS-3000 Operating And Installation Instructions Download Page 78

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Page 1: ...Publication No 036R480 000 Issue 6 January 1995 OPERATING AND INSTALLATION INSTRUCTIONS FOR TMS 3000 CELP VOICE CHANNEL MODULE General DataComm Inc MIDDLEBURY CONNECTICUT 06762 1299...

Page 2: ...ing pc cards during installation removal or setting of on board option switches Do not use a conductive tool such as a screwdriver or paper clip to set the position of the option switches INSTALLATION...

Page 3: ...TMS 3000 CELP VOICE CHANNEL MODULE GDC PART NOs 036M285 001 through 005 General DataComm Inc GDC Middlebury Connecticut 06762 1299 This product was designed and manufactured by...

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Page 5: ...Class A digital apparatus which complies with the Radio Interference Regulations CRC c 1374 PUBLICATION NOTICE This manual has been carefully compiled and checked for accuracy The infor mation in thi...

Page 6: ...ent and on the underside or rear panel of other equipment D If you experience trouble disconnect the equipment from the telephone line to determine if the equipment is malfunctioning If it is remain d...

Page 7: ...e customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian m...

Page 8: ..._______________ ___________________________________________________________________________________________________ ____________________________________________________________________________________...

Page 9: ...MOUNTING OF CELP VOICE CHANNEL MODULE 2 4 CELP VOICE CHANNEL SIGNALING 2 5 E Lead Signaling State 2 6 E Lead Polarity 2 6 Noise Suppression Filter 2 7 In Band E M Signaling 2 7 E Lead Loss of Sync 2 8...

Page 10: ...CS APPENDIX B CELP VOICE CHANNEL MODULE APPLICATIONS APPENDIX C M LEAD SIGNALING INTERFACES APPENDIX D CELP CIRCUIT VOICE LEVEL TESTING APPENDIX E CELP VOICE CHANNEL MODULE CONNECTOR PIN ASSIGNMENTS A...

Page 11: ...2 4 OPTION SELECTIONS E LEAD SIGNALING STATE 2 6 2 5 OPTION SELECTIONS E LEAD POLARITY 2 6 2 6 OPTION SELECTIONS NOISE SUPPRESSION FILTER 2 7 2 7 OPTION SELECTIONS IN BAND E M SIGNALING 2 7 2 8 OPTION...

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Page 13: ...through software on the piggyback card The bit rate is 4 8 6 4 or 9 6 kHz An echo canceller feature is provided for large inherent delays involved in the digital signal processing of the voice channe...

Page 14: ...TECHNICAL MANUALS To assist in installation of the CELP Voice Channel Module it is rec ommended that the following manuals be available If installing in a TMS 3000 Operating and Installation Instruct...

Page 15: ...ion GDC Part No CELP Voice Channel Module CELP Plug in 036P285 001 002 003 005 CELP Basecard 036P286 001 TABLE 1 2 FEATURE LIST Voice Module Equipment Features 036M285 001 CELP 1 036P285 001 036P286 0...

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Page 17: ...through the TMS Supervisory controller Section 5 de scribes these tests If the CELP Voice Channel Module passes these tests but subsequently fails to perform voice communications the CELP may not be...

Page 18: ...on AC15 Signaling AC15 Future use jumper position Note that switch SW1 on the piggyback card has been adjusted at the factory Do not under any circumstances change the settings of SW1 on the piggyback...

Page 19: ...HOWN IN DEFAULT POSITION DS1 DS2 J1 INT M IDL BSY US DEFAULT FOR S1 1 THROUGH S1 8 IS OFF THIS PROVIDES O dBm TRANSMIT AND O dBm RECEIVE LEVELS DEFAULT FOR S2 1 THROUGH S2 4 IS OFF DEFAULT FOR S2 5 IS...

Page 20: ...ought out to wire ends for punch down applications Available in 5 15 and 25 foot lengths 326H024 TMS 3000 TMS Compact MM PLUS or MINIMUX TDM to PBX DB 25 connector to 50 pin Amphenol connector Up to 8...

Page 21: ...Busy Application I GND M GND U S 0 Vdc 12 to 48 Vdc X1 X2 X3 X4 and X9 select II GND M BAT U S OPEN 12 to 48 Vdc the proper interface for dif III GND M BAT U S 0 Vdc 12 to 48 Vdc ferent E M signaling...

Page 22: ...Idle IDL With these two jumpers set in the position shown the E Lead pin 24 on the DB 25 EIA connector is in an Idle state during loss of power This selection is gen erally made for connections betwee...

Page 23: ...the voice traffic as the signaling information is conveyed end to end For proper operation pulse widths shall be a minimum of 20 ms 20 625 ms at a 4 8 kHz data rate This will yield a maximum of 0 625...

Page 24: ...when either the multiplexer or CELP Voice Channel Module declares loss of end to end synchronization This option will cause the circuit to be busy preventing further calls Freeze E lead ON OFF Freezes...

Page 25: ...put If actual output levels of connected equipment vary from the nominal levels of 0 dBm or 16 dBm switches S1 2 S1 3 S1 4 and S1 5 may be set to achieve some level of compensation in the range of 6 d...

Page 26: ...Input 2 dB 1 dB 4 dB 0 5 dB Compensation Application OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF ON ON ON ON ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF ON...

Page 27: ...ust be disabled The CELP Echo Canceller can not be disabled See Table 2 11 TABLE 2 11 OPTION SELECTIONS CODEC TIMING Switch S Feature Selection Desig Position Application CODEC Timing Source Basecard...

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Page 29: ...e Channel Module functions transparently You may check the operation of the CELP Voice Channel Module by monitoring the front panel indicators CONTROLS INDICATORS AND CONNECTORS Figure 3 1 illustrates...

Page 30: ...OPERATE ACCORDING TO THE PARAMETERS ENTERED FOR THAT CHANNEL IN THE ACTIVE CONFIGURATION WHEN OFF THE CHANNEL IS OUT OF SERVICE WHEN OUT OF SERVICE THE CONTROL LEADS ARE CONDITIONED TEST POINT FOR BR...

Page 31: ...exer Receive voice data is sent from the multiplexer at the reduced bit rate and passed through a receive elastic buffer similar to the transmit buffer on its way to the CELP piggyback card The receiv...

Page 32: ...s a 001 CELP Module then in band signaling will not be supported The Overhead Control Bandwidth method of E M signaling must be used in this case Piggyback Card Operation Serial PCM data at 64 kHz is...

Page 33: ...rce on the Channel Alarm light on a per manent basis and this could mask real channel alarms The 002 version of the card supports FAX bypass at the 6 4 kHz channel data rate The FAX data rate is norma...

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Page 35: ...usy state to prevent access by a PBX Control State Test The Control State Test forces the M Input at either end of the channel to a busy state The E lead at the remote end should be Busy as a result o...

Page 36: ...the test points The following test points are found on the CELP Voice Channel Module s front panel TP3 VFIN Analog Input signal to the transmit section TP2 VFOUT Analog Output signal from the receive...

Page 37: ...e package Product Repair Department General DataComm Inc 1579 Straits Turnpike P O Box 1299 Middlebury Connecticut 06762 1299 Lease and Maintenance contract customers may call DataComm Service Corpora...

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Page 39: ...y DIP switch Receive Section Nominal Output Level 0 dBm or 7 dBm switch selectable Output Adjustments 6 dB to 1 5 dB in 0 5 dB steps Adjustments made in software Data Rates Multiplexer 9 6 6 4 or 4 8...

Page 40: ...col CCITT Group 3 T 4 1988 T 30 1988 Transfer Rate Protocol V 21 300 bps Data V 29 9 6 7 2 kHz or V 27 ter 4 8 2 4 kHz Channel Rate 6 4 kHz Physical Base card 9 0 in x 6 25 in 22 86 cm x 15 88 cm Pigg...

Page 41: ...voice channel is designed for conveying speech Other audio forms e g music may not be transmitted Modems will not transmit data since phase information contained in the carrier will be lost One main a...

Page 42: ...ems the world over If the CELP Voice Module is used in an application which does not re quire E M signaling such as in open lines between brokers then in or der to ensure that breaks do not occur in t...

Page 43: ...GURE B 1 CELP VOICE CHANNEL MODULE USED IN PBX ANALOG TIE TRUNK TMS 3000 TMS COMPACT AND UNIV MM V4 APPLICATION PBX PBX PBX ANALOG TRUNKS ANALOG TRUNKS SATELLITE LINK MINIMUXTDM MINIMUX 56 64 KBPS PBX...

Page 44: ...00 64K TMS 3000 TMS 3000 FIGURE B 3 DEALER ROOM TO DEALER ROOM COMMUNICATIONS TMS 3000 TMS COMPACT APPLICATION DEALER ROOM DEALER ROOM DEALER ROOM LONDON NEW YORK 56K 64K TOKYO TMS 3000 MINIMUX MINIMU...

Page 45: ...C 12 TO 48 V TERMINATING EQUIPMENT VOICE CHANNEL SG M PTC BATT BATT M GND D INT INT A X2 ON CELP MODULE X2 ON VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X2 ON VLBRV CHANNEL MODULE X5 ON VOIC...

Page 46: ...N VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X2 ON VLBRV CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNEL MODULE AND...

Page 47: ...OICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X2 ON VLBRV CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNEL MODULE AND UN...

Page 48: ...N VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X2 ON VLBRV CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNEL MODULE AND...

Page 49: ...MODULES X2 ON VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X2 ON VLBRV CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNE...

Page 50: ...V CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X3 ON VLBRV CELP CHANNEL MODULE X6 ON VOICE...

Page 51: ...ARD X2 ON VLBRV CELP CHANNEL MODULE X5 ON VOICE II CVSD CHANNEL MODULE X3 ON VOICE II PCM ADPCM CHANNEL MODULES X3 ON VOICE II ASP CHANNEL MODULE AND UNIVERSAL VOICE CARD X3 ON VLBRV CELP CHANNEL MODU...

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Page 53: ...Education USA Phone Number 201 699 5802 You should be able to identify the features used by the equipment being connected to the voice module This information is available from the vendor in the form...

Page 54: ...it is necessary that the LOSS PLAN be in place The Loss Plan will have to be designed using later sections of this appendix A Loss Plan is a means of planning and defining the expected VF signal leve...

Page 55: ...multiple DS0 channels of the aggregate trunk Because of the bit interleaved technique the digital signal transmitted from the CELP module cannot be monitored on the aggregate trunk by any test equip...

Page 56: ...t to understand some terms and concepts when aligning voice circuits Two important terms that come to mind are dBm0 and TLP dBm0 is the signal level relative to the TLP TLP is the level of a 0 dB tone...

Page 57: ...d to insure proper level control and impedance matching CELP Codebook Excited Linear Predictive A module manu factured for use in General DataComm Multiplexers CODEC A circuit which creates a PCM code...

Page 58: ...it usually a telephone set Transhybrid Loss THL The attenuation of an analog signal as it passes through the hybrid from 2 wire in to 4 wire out or from 4 wire in to 2 wire out Nominal THL is approxim...

Page 59: ...t listener end Adjust the levels in the reverse direction using the same method Use the published TLP levels from the loss plan for setting levels When designing circuits choose 4 wire interfaces rath...

Page 60: ...ble amount of propagation delay in the circuit The CELP end to end delay is long enough for talker echo to be perceived from the re mote end Hence the CELP echo canceller will always be enabled CHECK...

Page 61: ...High Impedance mode Add only enough gain to compensate for the hybrid insertion losses Measure the Echo Return Loss ERL at each CELP Calculate each CELP s CODEC Echo Return Loss from the measured ERL...

Page 62: ...GING CIRCUITS Compile an end to end Loss Plan for the whole network Working off line but with the CELP or other loads connected to the ports adjust the Bridge insertion losses to within 0 1 dB if poss...

Page 63: ...eter in Bridged mode Make measurements from the DMARC block or DB25 on multiplexer It is always preferable to set the CELP to 0 dBm rather than to any other value If TLP information is not available o...

Page 64: ...DEALER DESKS In the case of Dealer Desks independent adjustments are made for the phone and microphone hoot n holler circuits The same rules apply to both regarding VF signal levels and Echo Return Lo...

Page 65: ...evels at each interface when a 0 dBm0 tone is being sent from one end to the other The levels may be different in either direction An example of a Loss Plan for a very simple circuit is two 4 wire tel...

Page 66: ...re circuit with a 3 dB loss in power i e ideal hybrid insertion loss is 3 dB Hybrids normally have attenuators in the 4 wire circuits for greater level control Active hybrids also have gain sections i...

Page 67: ...ansmits and receives tones quite well at frequencies ranging from 300 Hz to about 3000 Hz The dB meter used to measure signal levels should always be in Bridged or High Impedance mode so that it will...

Page 68: ...T PATH I E LOSS OF 4 dB ON CAUSES A GAIN OF 1 0 dB IN TRANSMIT INPUT PATH ON CAUSES A GAIN OF 2 0 dB IN TRANSMIT INPUT PATH I E LOSS OF 2 dB ON INPUT LEVEL IS 16 dBm PUTS 16 dB OF GAIN IN THE INPUT TR...

Page 69: ...APPENDIX D D 17...

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Page 71: ...the W BUS is controlled by the transmit control selects 13 Y BUS BI The direction of the Y BUS is controlled by the transmit control selects 14 CB1 IN The 1 024 MHz clock 15 CB2 IN The 921 6 kHz clock...

Page 72: ...ction of X BUS is determined by the transmit control selects P10 and P37 41 Z BUS BI The direction of Z BUS is determined by the transmit control selects P10 and P37 42 CB5 IN Not Used 43 CB6 IN Not U...

Page 73: ...on on Voice Channel Card 15 STATION BATTERY SB Provides a current limited station battery 12 to 48 V dc sourced from Pin 55 on the CELP VOICE CHANNEL MODULE base card when configured for a Type II or...

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Page 75: ...ynchronization B8ZS is a method used to meet the ones density constraints by taking strings of zeros converting them to ones and zeros and placing them back into the aggregate bit stream bps bits per...

Page 76: ...Interface Converts a formatted data signal into the proper signal levels for the digital T1 network Also called a cross connect ESF ESF Extended Superframe A modified D4 framing format The basic D4 f...

Page 77: ...by in case the other goes down The incoming signal is used as the master clock for the network Superframe A D4 frame consists of 1 frame bit followed by 24 eight bit time slots A D4 super frame conta...

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Page 79: ...echo suppressor 2 10 piggyback card operation 4 2 Piggyback Card 4 2 preoperational check 2 1 Pin Assignments Appendix E test points 5 2 Service and training 1 3 tests 5 1 SF tone 4 2 voice rates 1 1...

Page 80: ...AGE TMS STATKAT Canada Only KILOMUX V FAST G GENERAL DATACOMMUNICATIONS INDUSTRIES DESIGN WARRANTY NOTICE WARRANTIES General DataComm Inc hereafter referred to as GDC warrants that its equipment is fr...

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