Common use of Electrical Interface1 Clause in Contracts

Electrical Interface1. 3.1 Input and OutputThe electrical interface shall conform to CCITT Recommendation G. 7C3 for twisted pairs at 204S kbit/s. The input impedance of 120 Ohm balanced is required. The output impedance is approximately 20 Ohms as specified in G. 703. This is necessary to meet the required pulse shape masks.1.3.2 AttenuationThe attenuation of the interconnecting. cable (including any digital distribution frame or interconnecting equipment) shall not exceed 6dB at 1024 kHz.1.3.3 InterferenceBoth input ports shall tolerate, without error, interference from anon-synchronous standard test signal (CCITT Recommendation 0. 151) ata level 18dB lower than the wanted signal.1.3.4 Multiplex CharacteristicsThe multiplex structure shall be in accordance with CCITTRecommendation G. 732, and Recommendations G. 704 and G. 705 andQ. 501 - Q. 517 for operation involving digital exchanges.1.4 SIGNALLINGChapter 5 of Recommendation G. 732 applies.1.4.1 Signalling ProtocolThe signalling protocol between the PLMN and the PSTN will initially beJitter and wander tolerance at input ports will be as per CCITT Recommendation 5.G. 823 (1984) for 2Mbit/s links on the PDH network and for links provided on coopercables with regenerators. It should be noted that the ports should be able to tolerate afrequency offset greater than 50ppm.1.4.2 Time Slot ZeroChapter 2 of Recommendation G. 732 applies. However, Telkom requires access toany one of the spare five bits in the frame alignment word as control signals forperformance monitoring equipment and the application of loops for maintenancepurposes. It should be noted that Telkom monitoring equipment will insert CRC4co-efficient into the appropriate bits of the CRC4 rnultiframe if this facility is notprovided by the terminal multiplexers. The spare bits of the CRC4 multi-frame aretransmitted transparently. To allow these facilities a frame structure complying withG. 704 is required and the use of an unframed 2Mbit/s link will not be acceptable as itwill prevent the previously mentioned monitoring.1.4.3 Fault Conditions and Consequent Actions me provisions of Recommendations G. 732, Q. 501 to Q. 517 shall be implemented bythe Parties.1.4.4 Channel Time Slot Encoding CHANNEL TIME SLOTS The 64 kbit/s channel time slots comprising the 2043 kbit/s stream shall carry 'A' law encoded information as defined in Recommendation G. 71 1.IDLE CHANNEL BIT PATTERNThe idle channel bit pattern in both directions shall be 01010100 (MSB at left handend) in accordance with paragraph 2.4.6 of Recommendation Q. 503 when theinterface is between digital exchanges.2.0 Provisioning Procedures 6.2.1 Refer to the procedure described within clause 8 and 9 of the main body ofthe Agreement.2. 2 Preceding the placing of an order for a specified link, contact will be requiredbetween Telkom and Vodacom for the purposes of carrying out detailedplanning and project management. Such detailed planning and projectmanagement will involve the accommodation and location of Telkomtransmission equipment on Vodacom's premises and towers, the availabilityof dc and ac power and the accessibility of the premises and towers for theinstallation of equipment. At the time of placing an order, Vodacom shallindicate who the contact person is, as well as provide contact information.2.3 From Telkom's side such contact will be done at Regional level by appointedRegional co-ordinators.2.4 Where transmission equipment is to be located on Vodacom's premises ortowers for the purposes -of providing a fixed link, such accommodation, thenecessary dc and ac power, a 3 ohm earth and lightning protection, for thetransmission equipment, must be made available at least 60 days prior to thedate the fixed link is required to be in service, and at no cost to Telkom. Inaddition, Vodacom must ensure that Telkom personnel have full accessibilityto the site as from the date that the order for a specified link is placed. 2.5 Accommodation at Vodacom's premises or towers, for the location of transmission equipment for the purposes of providing a fixed link, must bebased on Telkom's Technical Instruction H1041, Installation of PCMEquipment at Customers Premises.2.6 For the purposes of long term planning within Telkom, Vodacom mustprovide Telkom with its two year forecast for specified link requirements onthe first working day of each calendar year. Such information, which must beforwarded to the Telkom appointed person, must include the quantity andpoint to point location of specified links, as well as an as accurate as possibleindication of the month within a particular year that such specified links will berequired.3.0 Operations and Maintenance Procedures 7.3.1 Reporting of FaultsService problems related to the transmission links provided to Vodacom shall bereported to Telkom's ISD as described in Appendix 3. Telkom and Vodacom's ISDshall also be timeously informed of planned outages on transmission links and bothParties shall agree upon a suitable time and the expected duration of such an outage.The Telkom ISD will report faults proven into the transmission links to the responsibletransmission maintenance section of Telkom according to internal fault reportingprocedures. Recurring Faultsin the case of recurring or intermittent faults, the Parties will undertake all reasonablemeasures to find and clear the fault by means of special investigations and permanentmonitoring of the relevant circuits.3.2. Access to PLMN sites housing transmission line terminating equipmentWhen faults on the transmission links to PLMN sites are reported, Vodacom mustprovide access or assistance to Telkom maintenance personnel at these sites duringtesting and repair of the fault. Telkom cannot be held responsible for outages due to alack of reasonable access or assistance at PLMN sites.3.3 Escalation proceduresIn all cases of outages on transmission links provided to Vodacom, the escalationprocedure as agreed upon in the network contract and escalation proceduredocument is applicable.3.4

Electrical Interface1. 3.1 Input and OutputThe electrical interface shall conform to CCITT Recommendation G. 7C3 703 for twisted pairs twistedpairs at 204S 2048 kbit/s. The input impedance of 120 Ohm balanced is required. The output Theoutput impedance is approximately 20 Ohms as specified in G. 703. This is necessary to necessaryto meet the required pulse shape masks.1.3.2 AttenuationThe attenuation of the interconnecting. interconnecting cable (including any digital distribution frame or interconnecting orinterconnecting equipment) shall not exceed 6dB 6d3 at 1024 kHz.1.3.3 InterferenceBoth input ports shall tolerate, without with cut error, interference from anona non-synchronous standard synchronousstandard test signal (CCITT Recommendation 0. 151) ata at a level 18dB lower than the wanted thewanted signal.1.3.4 Multiplex CharacteristicsThe multiplex structure shall be in accordance with CCITTRecommendation G. 732, and Recommendations CCITT Recommendation Q. 732,and Recommendation G. 704 and G. 705 andQ. and Q. 501 - Q. 517 for operation involving digital involvingdigital exchanges.1.4 SIGNALLINGChapter 5 of Recommendation G. 732 applies.1.4.1 Signalling ProtocolThe signalling protocol between the PLMN Wander and the PSTN will initially beJitter and wander tolerance JitterMaximum jitter at input output ports will be immediately preceding digital switching as per CCITT Recommendation 5.G. CCITTRecommendation G. 823 (1984) for 2Mbit/s links on the PDH network and for links provided on coopercables with regeneratorsparagraph 2 shall apply. It should be noted that the ports should be able access to tolerate afrequency offset greater than 50ppm.1.4.2 Time Slot ZeroChapter 2 of Recommendation G. 732 applies. However, Telkom requires access toany any one of the spare five bits in the frame alignment word as 5. control signals forperformance for performance monitoring equipment and the application of applicationof loops for maintenancepurposesmaintenance purposes. It should be noted that Telkom monitoring equipment will insert CRC4coCRC4 co-efficient into the appropriate bits of bitsof the CRC4 rnultiframe multiframe if this facility is notprovided not provided by the terminal multiplexers. The spare bits of the CRC4 multi-frame aretransmitted transparentlymultiframe are transmittedtransparently. To allow these facilities a frame structure complying withG. with G. 704 is required and the use of an unframed 2Mbit/s link will not be acceptable beacceptable as itwill it will prevent the previously mentioned monitoring.1.4.3 monitoring.1.4.5 Fault Conditions and Consequent Actions me The provisions of Recommendations G. 732, Q. 501 to Q. 517 shall be implemented bythe Parties.1.4.4 beimplemented by the Parties.1.4.6 Channel Time Slot Encoding CHANNEL EncodingCHANNEL TIME SLOTS The SLOTSThe 64 kbit/s channel time slots comprising the 2043 2048 kbit/s stream shall carry 'shallcarry "A' " law encoded information as defined in Recommendation G. 71 1.IDLE 711.IDLE CHANNEL BIT PATTERNThe PATTERN the idle channel bit pattern in both directions shall be 01010100 (MSB at left handendatleft hand end) in accordance with paragraph 2.4.6 of Recommendation Q. RecommendationQ. 503 when theinterface the interface is between digital exchanges.2.0 Provisioning Procedures 6.2.1 Refer to the procedure described within clause 8 and 9 exchanges.1.5 SynchronisationSynchronisation of the main body ofthe Agreement.2. 2 Preceding the placing of an order for a specified link, contact Telecommunications Networks will be requiredbetween Telkom and Vodacom for attained on the purposes of carrying out detailedplanning and project management. Such detailed planning and projectmanagement will involve the accommodation and location of Telkomtransmission equipment on Vodacom's premises and towers, the availabilityof dc and ac power and the accessibility interfacepoints of the premises and towers for theinstallation PLMN with the PSTN.This will be accomplished by:Telkom providing the standard reference signal from two caesium clockswhich are continuously synchronised with the CSIR's rubidium clock,which in turn synchronise the international exchanges, 7.which in turn synchronise the Digital Primary Switching Units (DPSUs).The synchronisation of equipment. At the time of placing an order, Vodacom shallindicate who the contact person isMobile Switching Centres (MSCs) will be achieved byhaving a connection to two DPSUs or, as well as provide contact information.2.3 From Telkom's side such contact an alternative if two direct links are notavailable, to one DPSU and any other MSC.The two E1 links in which the Common Channel Signalling System Number 7 (CCS 7)will be provided, will be done at Regional level by appointedRegional co-ordinators.2.4 Where transmission equipment is to be located on Vodacom's premises ortowers for the purposes -of providing a fixed link, such accommodation, thenecessary dc and ac power, a 3 ohm earth and lightning protection, for thetransmission equipment, must be made available at least 60 days prior to thedate the fixed link is required to be in service, and at no cost to Telkom. Inaddition, Vodacom must ensure that Telkom personnel have full accessibilityto the site as from the date that the order for a specified link is placed. 2.5 Accommodation at Vodacom's premises or towers, for the location of transmission equipment for the purposes of providing a fixed link, must bebased on Telkom's Technical Instruction H1041, Installation of PCMEquipment at Customers Premises.2.6 For the purposes of long term planning within Telkom, Vodacom mustprovide Telkom with its two year forecast for specified link requirements onthe first working day of each calendar year. Such information, which must beforwarded to the Telkom appointed person, must include the quantity andpoint to point location of specified links, as well as an as accurate as possibleindication of the month within a particular year that such specified links will berequired.3.0 Operations and Maintenance Procedures 7.3.1 Reporting of FaultsService problems related to the transmission links provided to Vodacom shall bereported to Telkom's ISD as described in Appendix 3. Telkom and Vodacom's ISDshall also be timeously informed used for synchronisation purposes since the E1s will beappropriately xxxxxx.Xx the event of planned outages on transmission links and bothParties both 5it streams failing, an internal source meeting CCITTRecommendation G. 811 shall agree upon a suitable time and become the expected duration of such an outage.The Telkom ISD will report faults proven into the transmission links to the responsibletransmission maintenance section of Telkom according to internal fault reportingprocedures. Recurring Faultsin the case of recurring or intermittent faults, the Parties will undertake all reasonablemeasures to find and clear the fault by means of special investigations and permanentmonitoring of the relevant circuits.3.2. Access to PLMN sites housing transmission line terminating equipmentWhen faults on the transmission links to PLMN sites are reported, Vodacom mustprovide access or assistance to Telkom maintenance personnel at these sites duringtesting and repair of the fault. Telkom cannot be held responsible for outages due to alack of reasonable access or assistance at PLMN sites.3.3 Escalation proceduresIn all cases of outages on transmission links provided to Vodacom, the escalationprocedure as agreed upon in the network contract and escalation proceduredocument is applicable.3.4worker.1.6 CCS 7

Electrical Interface1. 3.1 Input and OutputThe electrical interface shall conform to CCITT Recommendation G. 7C3 703 for twisted pairs twistedpairs at 204S 2048 kbit/s. The input impedance of 120 Ohm balanced is required. The output Theoutput impedance is approximately 20 Ohms as specified in G. 703. This is necessary to necessaryto meet the required pulse shape masks.1.3.2 AttenuationThe attenuation of the interconnecting. interconnecting cable (including any digital distribution frame or interconnecting orinterconnecting equipment) shall not exceed 6dB at 1024 kHz.1.3.3 InterferenceBoth input ports shall tolerate, without error, interference from anona non-synchronous standard synchronousstandard test signal (CCITT Recommendation 0. 151) ata at a level 18dB lower than the wanted thewanted signal.1.3.4 Multiplex CharacteristicsThe multiplex structure shall be in accordance with CCITTRecommendation CCITT Recommendation G. 732, and Recommendations 732,and Recommendation G. 704 and G. 705 andQ. and Q. 501 - Q. 517 517-for operation involving digital involvingdigital exchanges.1.4 SIGNALLINGChapter 5 of Recommendation G. 732 applies.1.4.1 Signalling ProtocolThe signalling protocol between the PLMN Wander and the PSTN will initially beJitter JitterMaximum jitter at output ports immediately preceding digital switching as per CCITTRecommendation G. 823 (1984) paragraph 2 shall apply.4.Jitter and wander tolerance at input ports will be as per CCITT Recommendation 5.G. RecommendationG. 823 (1984) for 2Mbit/s links on the PDH network and for links provided on coopercables coppercables with regenerators. It should be noted that the ports should be able to tolerate afrequency offset greater than 50ppm.1.4.2 Time Slot ZeroChapter 2 of Recommendation G. 732 applies. However, Telkom requires access toany one of the spare five bits in the frame alignment word as control signals forperformance monitoring equipment and the application of loops for maintenancepurposes. It should be noted that Telkom monitoring equipment will insert CRC4co-efficient into the appropriate bits of the CRC4 rnultiframe multiframe if this facility is notprovided by the terminal multiplexers. The spare bits of the CRC4 multi-frame multiframe aretransmitted transparently. To allow these facilities a frame structure complying withG. 704 is required and the use of an unframed 2Mbit/s link will not be acceptable as itwill prevent the previously mentioned monitoring.1.4.3 Fault Conditions and Consequent Actions me ActionsThe provisions of Recommendations G. 732, Q. 501 to Q. 517 shall be implemented bythe Parties.1.4.4 Channel Time Slot Encoding CHANNEL EncodingCHANNEL TIME SLOTS The SLOTSThe 64 kbit/s channel time slots comprising the 2043 2048 kbit/s stream shall carry '"A' law encoded " lawencoded information as defined in Recommendation G. 71 1.IDLE 711.IDLE CHANNEL BIT PATTERNThe idle channel bit pattern in both directions shall be 01010100 (MSB at left handend) in accordance with paragraph 2.4.6 2. 4. 6 of Recommendation Q. 503 when theinterface is between digital exchanges.2.0 exchanges.5.2.0 Provisioning Procedures 6.2.1 Procedures2.1 Refer to the procedure described within clause 8 and 9 of the main body ofthe Agreement.2. 2 Agreement.2.2 Preceding the placing of an order for a specified link, contact will be requiredbetween Telkom and Vodacom MTN for the purposes of carrying out detailedplanning and detailed planningand project management. Such detailed planning and projectmanagement will project managementwill involve the accommodation and location of Telkomtransmission equipment Telkom transmissionequipment on VodacomMTN's premises and towers, the availabilityof availability of dc and ac power acpower and the accessibility of the premises and towers for theinstallation of equipmentthe installation ofequipment. At the time of placing an order, Vodacom shallindicate MTN shall indicate who the contact thecontact person is, as well as provide contact information.2.3 From Telkom's side such contact will be done at Regional level by appointedRegional co-ordinators.2.4 Where transmission equipment is to be located on VodacomMTN's premises ortowers for or towersfor the purposes -of of providing a fixed link, such accommodation, thenecessary dc and ac power, a 3 ohm earth and lightning protection, for thetransmission equipment, must be made available at least (60 days Days prior to thedate the fixed link is required to be in service, and at no cost to Telkom. Inaddition, Vodacom MTN must ensure that Telkom personnel have full accessibilityto the accessibility tothe site as from the date that the order for a specified link is placed. 2.5 placed.2.5 Accommodation at VodacomMTN's premises or towers, for the location of transmission oftransmission equipment for the purposes of providing a fixed link, must bebased on Telkom's Technical Instruction H1041, Installation of PCMEquipment at Customers Premises.2.6 For the purposes of long term planning within Telkom, Vodacom mustprovide Telkom MTN must provideTelkom with its two year forecast for specified link requirements onthe first working on the firstworking day of each calendar year. Such information, which must beforwarded to the Telkom appointed person, must include the quantity andpoint to point location of specified links, as well as an as accurate as possibleindication of the month within a particular year that such specified links will berequired.3.0 Operations and Maintenance Procedures 7.3.1 Reporting of FaultsService problems related to the transmission links provided to Vodacom shall bereported to Telkom's ISD as described in Appendix 3. Telkom and Vodacom's ISDshall also be timeously informed of planned outages on transmission links and bothParties shall agree upon a suitable time and the expected duration of such an outage.The Telkom ISD will report faults proven into the transmission links to the responsibletransmission maintenance section of Telkom according to internal fault reportingprocedures. Recurring Faultsin the case of recurring or intermittent faults, the Parties will undertake all reasonablemeasures to find and clear the fault by means of special investigations and permanentmonitoring of the relevant circuits.3.2. Access to PLMN sites housing transmission line terminating equipmentWhen faults on the transmission links to PLMN sites are reported, Vodacom mustprovide access or assistance to Telkom maintenance personnel at these sites duringtesting and repair of the fault. Telkom cannot be held responsible for outages due to alack of reasonable access or assistance at PLMN sites.3.3 Escalation proceduresIn all cases of outages on transmission links provided to Vodacom, the escalationprocedure as agreed upon in the network contract and escalation proceduredocument is applicable.3.4berequired.6.3.0