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ITU-T G.9954 (01/2007)

مرسلات-مستقبلات شبكات الخطوط الهاتفية - مواصفات محسنة للطبقة المادية وطبقة النفاذ إلى الوسيط وطبقة الوصلة

تعرف التوصية ITU-T G.9954 الطبقات المادية والنفاذ للوسائط والوصلات والتقارب في مجموعة بروتوكول لأغراض الإصدار الثاني من نظام G.9954 الذي يوفر الميزات التالية:
• التشغيل عبر خط الهاتف و/أو عبر الكبل متحد المحور؛
• معدلات إرسال حمولة المستخدم في الطبقة المادية التي تتراوح بين 4 و320 Mbit/s؛
• أجهزة الإرسال والاستقبال المكيفة حسب المعدل والتي ترسل معدلات البيانات، ومعدلات خطأ الرزمة لظروف القنوات المتغيرة بصورة دينامية على أساس كل رزمة على حدة؛
• تقنية الاتساع المتعامد متباين التردد للاتصالات عبر خط الهاتف أو عبر الكبل متحد المحور؛
• حجب نطاق من الطيف لتحقيق التلاؤم مع خدمات راديو الهواة؛
• بروتوكول النفاذ إلى الوسائط التزامني الذي يحكمه جهاز رئيسي مختار بصورة دينامية يستخدم استراتيجية النفاذ إلى الوسائط بتجنب الصدام؛
• توفير الدعم لخدمات البيانات ذات معدل البتات الثابت والمتغير؛
• اتصالات من نظير لنظير داخل شبكة يحكمها جهاز رئيسي؛
• تجميع الرزم (الترزيم) الذي يتم داخل طبقة كدسة الإصدار الثاني من بروتوكول G.9954 حتى حدود الكمون في تدفقات الخدمة وعرض نطاق الإرسال المتاح؛
• ضمانات جودة الخدمة لعرض النطاق والارتعاش والكمون ومعدل خطأ البتات؛
• دعم جودة الخدمات بمواصفات واضحة للحركة والمعدل مما يوفر طبقة وصلات تناسب بصورة جيدة التدفقات السمعية والبصرية؛
• طبقات التقارب الخاصة بالبروتوكول؛
• التوافق مع الإصدارات السابقة من التوصية G.9951/G.9952 بالأسلوب A عبر خط الهاتف باستخدام بروتوكول MAC غير المتزامن في التوصية G.9951/2؛
• التعايش وقابلية التشغيل البيني بين أجهزة G.9954v1 وG.9954v2 في شبكة مختلطة؛
• التوافق مع خدمات خطوط الهاتف الأخرى مثل POTS وV.90 والشبكة الرقمية للخدمات المتكاملة وكل من G.992.1 وG.992.2 وG.992.3 وG.992.4؛
• التوافق مع الخدمات الأخرى عبر الكبل متحد المحور مثل VDSL وVDSL2 وقنوات التلفزيون الكبلي؛
• قابلية التشغيل البيني بين الهاتف والطبقات PHY المحورية التي تستعمل الأسلوبين A وB، بما يسمح بوجود شبكة تضم خطوط الهاتف والكبلات المحورية في نفس الوقت؛
• الإدارة المحلية وعن بُعد لأجهزة G.9954v2؛
• أحكام خاصة بتوسعات الأمن في المستقبل.

Citation:	https://handle.itu.int/11.1002/1000/9011
Series title:	G series: Transmission systems and media, digital systems and networks G.9000-G.9999: Access networks G.9900-G.9999: In premises networks
Approval date:	2007-01-09
Provisional name:	G.pnt3
Approval process:	AAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 15
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
2	G.9954 (01/2007)	In force	here	here	here
1	G.9954 (02/2005)	Superseded	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
G Suppl. 4 (12/1972)	Certain methods of avoiding the transmission of excessive noise between interconnected systems	In force	-	-	here
G Suppl. 5 (10/1984)	Measurement of the load of telephone circuits under field conditions	In force	-	-	here
G Suppl. 7 (12/1972)	Loss-frequency response of channel-translating equipment used in some countries for international circuits	In force	here	here	here
G Suppl. 8 (12/1972)	Method proposed by the Belgian telephone administration for interconnection between coaxial and symmetric pair systems	In force	-	-	here
G Suppl. 17 (10/1984)	Group-delay distortion performance of terminal equipment	In force	-	-	here
G Suppl. 19 (10/1984)	Digital crosstalk measurement (method used by the Administrations of France, the Netherlands and Spain)	In force	-	-	here
G Suppl. 22 (10/1984)	Mathematical models of multiplex signals	In force	-	-	here
G Suppl. 26 (10/1984)	Estimating the signal load margin of FDM wideband amplifier equipment and transmission systems	In force	-	-	here
G Suppl. 27 (10/1984)	Interference from external sources	In force	-	-	here
G Suppl. 28 (10/1984)	Application of transmultiplexers, FDM codecs, data-in-voice (DIV) systems and data-over-voice (DOV) systems during the transition from an analogue to a digital network	In force	-	-	here
G Suppl. 32 (11/1988)	Transfer of alarm information on 60-channel transmultiplexing equipment	In force	-	-	here
G Suppl. 34 (11/1988)	Temperature in underground containers for the installation of repeaters	In force	-	-	here
G Suppl. 35 (11/1988)	Guidelines concerning the measurement of wander	In force	-	-	here
G Suppl. 36 (11/1988)	Jitter and wander accumulation in digital networks	In force	-	-	here
G Suppl. 39 (10/2025)	Optical system design and engineering considerations	In force	here	-	here
G Suppl. 40 (07/2024)	Optical fibre and cable Recommendations and standards guideline	In force	here	here	here
G Suppl. 41 (07/2024)	Design guidelines for optical fibre submarine cable systems	In force	here	here	here
G Suppl. 42 (10/2018)	Guide on the use of the ITU-T Recommendations related to optical fibres and systems technology	In force	here	here	here
G Suppl. 43 (02/2011)	Transport of IEEE 10GBASE-R in optical transport networks (OTN)	In force	here	here	here
G Suppl. 44 (06/2007)	Test plan to verify B-PON interoperability	In force	here	here	here
G Suppl. 45 (09/2022)	Power conservation in optical access systems	In force	here	here	here
G Suppl. 46 (05/2009)	G-PON interoperability test plan between optical line terminations and optical network units	In force	here	here	here
G Suppl. 47 (03/2025)	General aspects of optical fibres and cables	In force	here	here	here
G Suppl. 48 (06/2010)	10-Gigabit-capable passive optical networks: Interface between media access control with serializer/deserializer and physical medium dependent sublayers	In force	here	here	here
G Suppl. 49 (09/2020)	Rogue optical network unit (ONU) considerations	In force	here	here	here
G Suppl. 50 (09/2011)	Overview of digital subscriber line Recommendations	In force	here	here	here
G Suppl. 51 (06/2017)	Passive optical network protection considerations	In force	here	here	here
G Suppl. 52 (09/2012)	Ethernet ring protection switching	In force	here	here	here
G Suppl. 53 (12/2014)	Guidance for Ethernet OAM performance monitoring	In force	here	here	here
G Suppl. 54 (07/2015)	Ethernet linear protection switching	In force	here	here	here
G Suppl. 55 (10/2025)	Radio-over-fibre (RoF) technologies and their applications	In force	here	-	here
G Suppl. 56 (02/2016)	OTN transport of CPRI signals	In force	here	here	here
G Suppl. 57 (07/2015)	Smart home profiles for 6LoWPAN devices	In force	here	here	here
G Suppl. 58 (07/2024)	Optical transport network module framer interfaces	In force	here	here	here
G Suppl. 59 (02/2018)	Guidance on optical fibre and cable reliability	In force	here	here	here
G Suppl. 60 (09/2016)	Ethernet linear protection switching with dual node interconnection	In force	here	here	here
G Suppl. 62 (02/2018)	Gfast certification	In force	here	here	here
G Suppl. 64 (02/2018)	PON transmission technologies above 10 Gb/s per wavelength	In force	here	here	here
G Suppl. 65 (10/2018)	Simulations of transport of time over packet networks	In force	here	here	here
G Suppl. 66 (09/2020)	5G wireless fronthaul requirements in a passive optical network context	In force	here	here	here
G Suppl. 67 (07/2019)	Application of optical transport network Recommendations to 5G transport	In force	here	here	here
G Suppl. 68 (10/2025)	Synchronization operations, administration and maintenance requirements	In force	here	-	here
G Suppl. 69 (09/2020)	Migration of a pre-standard network to a metro transport network	In force	here	here	here
G Suppl. 70 (09/2020)	Supplement on sub 1 Gbit/s services transport over optical transport network	In force	here	here	here
G Suppl. 71 (12/2023)	Optical line termination capabilities for supporting cooperative dynamic bandwidth assignment	In force	here	here	here
G Suppl. 72 (03/2025)	Modelling consideration for optical media networks	In force	here	here	here
G Suppl. 73 (10/2021)	Influencing factors on quality of experience for multiview video (MVV) services	In force	here	here	here
G Suppl. 74 (12/2021)	Network slicing in a passive optical network context	In force	here	here	here
G Suppl. 75 (12/2021)	5G small cell backhaul/midhaul over TDM-PON	In force	here	here	here
G Suppl. 76 (12/2021)	Optical transport network security	In force	here	here	here
G Suppl. 77 (06/2022)	Supplement 77 to ITU-T G-series of Recommendations - Influencing factors on quality of experience (QoE) for video customized alerting tone (CAT) and video customized ringing signal (CRS) services	In force	here	here	here
G Suppl. 78 (09/2022)	Use case and requirements of fibre-to-the-room for small business applications	In force	here	here	here
G Suppl. 79 (12/2023)	Latency control and deterministic capability over a PON system	In force	here	here	here
G Suppl. 80 (07/2024)	Use case and requirements of fibre-based in-premises networking for home application (FIP4H)	In force	here	here	here
G Suppl. 81 (10/2025)	Practical aspects of PON security - Revision 1	In force	here	-	here
G Suppl. 82 (07/2024)	Enhanced optical line termination with information technology functions	In force	here	here	here
G Suppl. 83 (10/2025)	Supplement on the use of options in the precision time protocol profile with full timing support from the network	In force	here	-	here
G Suppl. 84 (03/2025)	Operational aspects of optical access	In force	here	here	here
G Suppl. 85 (03/2025)	FgODUflex over point-to-multipoint networks	In force	here	here	here
G Suppl. 86 (03/2025)	Fibre to the power grid (FTTGrid) use cases and network requirements	In force	here	here	here
G Suppl. 87 (03/2025)	Standardization framework for optical fibres for space division multiplexing	In force	here	here	here
G Suppl. 88 (10/2025)	Point to multipoint passive optical access system requirements and transmission technologies above 50 Gbit/s per wavelength	In force	here	-	here
G Suppl. 89 (10/2025)	Coordinated management of access and fibre in premises networks	In force	here	-	here
G Suppl. 90 (10/2025)	Coexistence between G.fin and G.Xfin systems	In force	here	-	here
G Suppl. 91 (10/2025)	Use cases and requirements of fibre-in-premises for small and medium enterprise applications	In force	here	-	here
G Suppl. 92 (10/2025)	Synchronization for data centres	In force	here	-	here

Title	Approved on	Download
Roadmap for QoS and QoE in the ITU-T Study Group 12 context (TR-RQ)	2023	here
Operation of G.hn technology over access and in-premises phone line medium	2022	here
Considerations on the use of GNSS as a primary time reference in telecommunications	2020	here
Use of G.hn in industrial applications	2020	here

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ITU-T Recommendations

ITU-T G.9954 (01/2007)