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СОДЕРЖАНИЕ
1 Принципы построения IP сети и требования по предоставлению качества услуг
1.1 Технология пакетной передачи речи и телевизионного изображения
1.3 Краткое описание требований предоставления IP услуг и параметров качества
2 Расчет сетевых параметров в проектируемой среде
2.1 Математическая модель расчета сетевых параметров
2.2 Расчет матрицы информационного тяготения
3 Технические решения для реализации IP сети
3.1 Технология абонентского доступа в IP сети
3.2 Выбор протокола маршрутизации для IP сети
3.4 Выбор сетевого оборудования
Таблица Г.2 — Технические характеристики VoIP шлюза Cisco MGX 8880
| Features | Description | |
| System | • 45-Gbps nonblocking switching capacity • 12 double-height (24 single-height) slots for service modules and 2 processor switch module slots | |
| Node Synchronization | • Internal Stratum Level 3 clock source • Building Integrated Timing Supply (BITS) source • External source received in band over the network • Synchronization to software-programmable primary and secondary sources, with automatic switchover | |
| Network Interfaces | • VoIP-Ethernet, Fast Ethernet, Gigabit Ethernet, POS OC-12/STM-4, T1/E1, T3/E3, OC-3c/STM-1, OC-12c/STM-4, OC-48c/STM-16 • VoATM-T1/E1, T3/E3, OC-3c/STM-1, OC-12c/STM-4, OC-48c/STM-16 | |
| TDM Interfaces | • T1/E1, T3, OC-3/STM-1 | |
| Network Protocols | • IPv4, MPLS, Border Gateway Protocol Version 4 (BGPv4), Intermediate System-to-Intermediate System (IS-IS), Open Shortest Path First Version 2 (OSPFv2), Enhanced Interior Gateway Routing Protocol (EIGRP), Routing Information Protocol Version 2 (RIPv2), and Internet Group Management Protocol (IGMP) • ATM User-Network Interface Version 3 (UNIv3), UNIv3.1, and UNIv4; ITU-T I.361; ITU-T I.432; Integrated Local Management Interface Version 4 (ILMIv4); Private Network-Network Interface Version 1 (PNNIv1); permanent virtual circuit (PVC); switched virtual circuit (SVC); and soft permanent virtual connection (SPVC) | |
| Signaling and Call Control | • MGCP, TGCP, H.248, H.323, and SIP • ISDN Primary Rate Interface (PRI) • Channel associated signaling (CAS) • Feature group D multi frequency support for E911 and operator services | |
| QoS | • Connection Admission Control • IP Differentiated Services (DiffServ) using IP type of service (ToS) and DiffServ code point (DSCP) • MPLS DiffServ • DiffServ-aware traffic engineering • Low-latency queuing (LLQ), Weighted Random Early Detection (WRED), Class-Based Weighted Fair Queuing (CB-WFQ) • Constant bit rate (CBR), real-time variable bit rate (VBR-rt), and non-real-time variable bit rate (VBR-nrt) classes of service for ATM | |
| Bearer Services | • VoIP and VoATM (ATM Adaption Layer 1 [AAL1], AAL2) • G.168 programmable echo cancellation up to 128 ms on all channels • G.711, G.723.1, G.726, G.729a/b, and Clear Channel codecs • Silence suppression and Comfort Noise Generation • T.38 Fax Relay • Standards-based AAL2 subcell multiplexing • Standards-based AAL2 type 3 cells for Dual Tone Multi Frequency (DTMF) relay • DTMF detection and generation • Onboard announcements and tones • Lawful intercept (Communications Assistance for Law Enforcement ACT [CALEA]) support for call content • Onboard conferencing • RFC 2833 DTMF relay • Fax and modem tone detection • DTMF relay to softswitch for application control | |
| Management Interfaces | Simple Network Management Protocol (SNMP), command-line interface (CLI), Telnet, Secure Shell (SSH) Protocol | |
| Physical Specifications | ||
| Dimensions | Height: 24.5 in. (62.2 cm) Width: 17.7 in. (45 cm) Depth: 21.5 in. (54.6 cm) | |
| Mounting Options | Rack-mountable in 19- and 23-in. (48.2 x 58.4 cm) EIA/RETMA and ETSI racks | |
| Electrical Specifications | ||
| Power | Input power required: -42 to -56 VDC Optional 110/220 AC power Typical power consumption: 1000W | |
| Electrical and Safety Compliance | ||
| EMI/ESD Compliance | FCC Part 15 Bellcore GR1089-CORE IEC 801-2 EN55022 (CISPR22) CFR 47 Part 15 (FCC) AS/NZS 3548 (Australia/New Zealand) ETS 300 386-2 (EN300 386-2) EN 61000-4-2 (IEC-61000-4-2) EN 61000-4-3 (IEC-61000-4-3) EN 61000-4-4 (IEC-61000-4-4) EN 61000-4-5 (IEC-61000-4-5) | |
| Safety Compliance | UL 1950, CSA C22.2 No. 950, EN60950, AS/NZS 3260, IEC 60950 IEC 60825-1, EN60825-1 Bellcore NEBS: Level 3 Optical safety: IEC 825-1 (Class 1) | |
Таблица Г.3 – Технические характеристики сервера Cisco IP/TV 3427-С3
| | Cisco IP/TV 3427-C3 Broadcast Server |
| Форматы видео | MPEG-1, MPEG-2, MPEG-4 |
| Накопитель | 144 Гб SCSI |
| Сетевые интерфейсы | 10/100-Mbps Ethernet |
| Периферийные порты | VGA graphics, клавиатура, мышь |
| Высота | 85.4 мм |
| Ширина | 443.5 мм |
| Длина | 698.0 мм |
| Вес | 28.1 кг |
| Питание | 350Вт max резервирование, "горячая" замена |
| Частота | 50/60 Гц |
| Температура эксплуатации | 10-35°C |
| Температура хранения | -40-60°C |