ÿWPCL ûÿ2BJ|xÐ ` ÐÐÌÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿH øÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÌÐÐ °°°è ÐÑ Âx„|ü@Ž ÑÐ Å°6Ø'°6Ø'Å Ð8.ÁHÁÓÓÃÃRevisions proposed to Recommendation 0.162ÄÄ ÁHÁÃÃChangeÄÄ the existing title to: Ð ° ÐÁHÁ"EQUIPMENT TO PERFORM IN SERVICE MONITORING ON 2048 KBIT/S SIGNALS" ÁHÁÃÃChangeÄÄ ÀÀ 1.1 to read: "1.1ÁHÁThis specification describes an instrument for performing in©service error tests on 2 Mbit/s signals having frame structures that are in accordance with Recommendation G.704 [1]." ÁHÁÃÃIntroduceÄÄ new ÀÀÀÀ 1.4 and 1.5 as follows: Ð à Ð"1.4ÁHÁThe instrument is required to monitor any Cyclic Redundancy Check (CRC) Procedure signals, in accordance with Recommendation G.704 [1], conveyed within the frame alignment signal, and time slot 0 (TSO) of frames not containing the frame alignment signal. 1.5ÁHÁAs an option the instrument may provide access to the information bits conveyed in any selected time slot." ÁHÁÃÃRenumberÄÄ existing ÀÀ 1.4 to "1.6 HDB3 Decoding Strategy". ÁHÁÃÃChangeÄÄ the references to Recommendation G.732 in ÀÀÀÀ 3.3.3.1 and 3.3.3.2 to Recommendation G.706". ÁHÁÃÃAddÄÄ the following note after ÀÀ 3.3.3.2: "ÃÃNoteÄÄ © The instrument shall be able to synchronize to frames with or without CRC bits." ÁHÁÃÃChangeÄÄ the term "error rate" to: "binary error rates" in ÀÀ 3.3.4.1 (three times) and in Table 1/0.62 (two times). ÁHÁÃÃIntroduceÄÄ the following new section 3.4 in the Recommendation: "3.4ÁHÁÃÃCyclic redundancy check procedureÄÄ 3.4.1ÁHÁWhere a Cyclic Redundancy Check (CRC) procedure in accordance with Recommendation G.704 [1] is implemented within the 2 Mbit/s signal the instrument shall provide the features detailed in ÀÀÀÀ 3.4.2, 3.4.3 and 3.4.4. 3.4.2ÁHÁThe instrument shall indicate the presence of CRC framing bits. 3.4.3ÁHÁThe instrument shall have a means of indicating binary error ratios of 1 x 10Ãé5ÄÄ, 1 x 10Ãé6ÄÄ and 1 x 10Ãé7ÄÄ and shall cause the appropriate indicator to be illuminated under the conditions defined. ÁHÁThe indication of binary error ratios occurring in the received decoded signal and detected by means of the CRC procedure information shall comply with the limits given in Table 2/0.162. ÁàÀKÁTABLE 2/0.162ƒ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À À ÀBinary À À Average À À Probability of indication illuminating or À À À Àerror ratioÀ À binary error À À extinguishing within the periods stated below À À À Àindication À À ratio in ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À À À À decoded signalÀ À Illuminate À À Extinguish À À ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À À À À 1 x 10Ãé5ÄÄ À À 50% within 1s À À 5% within 1s À À À À 1 x 10Ãé5ÄÄ À À 5 x 10Ãé6ÄÄ À À 5% within 1s À À © À À À À À À 1 x 10Ãé6ÄÄ À À © À À 95% within 1s À À ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À À À À 1 x 10Ãé6ÄÄ À À 50% within 10s À À 5% within 10s À À À À 1 x 10Ãé6ÄÄ À À 5 x 10Ãé7ÄÄ À À 5% within 10s À À © À À À À À À 1 x 10Ãé7ÄÄ À À © À À 95% within 10s À À ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À À À À 1 x 10Ãé7ÄÄ À À 50% within 100s À À 5% within 100s À À À À 1 x 10Ãé7ÄÄ À À 5 x 10Ãé8ÄÄ À À 5% within 100s À À © À À À À À À 1 x 10Ãé8ÄÄ À À © À À 95% within 100s À À À ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ À 3.4.4ÁHÁIt shall also be possible to count the sum of the errors indicated. The count capacity shall be 99 999. A separate indication shall be given if the count exceeds this figure." ÁHÁÃÃRenumberÄÄ the existing ÀÀ 3.4 to "3.5 Code violation detection" ÁHÁÃÃIntroduceÄÄ a new ÀÀ 3.6 as follows: "3.6ÁHÁÃÃPerformance indicationsÄÄ ÁHÁAs an option the instrument shall be capable of providing performance information in accordance with G.821 © Under Study". ÁHÁÃÃRenumberÄÄ the existing ÀÀ 3.5 to "3.7 Lamp look © Lamp auto reset". ÁHÁÃÃIntroduceÄÄ a new ÀÀ 3.8 as follows: "3.8ÁHÁÃÃTime slot accessÄÄ ÁHÁAs an option it shall be possible to access, at an external interface, the contents of any selected time slot, including TS16. An external interface meeting the requirements of a co©directional interface, as defined in Recommendation G.703 [2], is preferred." ÁHÁÃÃIntroduceÄÄ a new ÀÀ 4.2 as follows and ÃÃrenumberÄÄ the existing ÀÀ 4.2 to "ÀÀ 4.3": "4.2ÁHÁReferences to counters and displays being illuminated and extinguished does not imply that "light emitting" displays are essential". ÁHÁÃÃReplaceÄÄ the existing sections 6 and 7 by the following ones: "6.ÁHÁÃÃAlarm output signalÄÄ ÁHÁAs an option, an interface shall be provided to enable an external device, e.g. printer, to be connected to the instrument to allow recording of the status of the digital signal input to the instrument. ÁHÁAn interface in accordance with Recommendation V.24/V.28, carrying suitably abbreviated, plain text messages in ASCII/T.50 coded format according to the requirements of Recommendation V.4 is preferred. 7.ÁHÁÃÃOperating environmentÄÄ ÁHÁThe electrical performance requirements shall be met when operating within the climatic conditions specified in Recommendation 0.3." ÁHÁÃÃDeleteÄÄ the existing Tables 2/0.162 and 3/0.162 from the Recommendation. Ô ñ,ÔŒ ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ