media gateway control protocol

... requirements to be placed on the Media Gateway control protocol When the word protocol is used on its own in this document it implicitly means the Media Gateway control protocol Terminology In this ... other functions, e.g an SG function * Media Gateway Controller (MGC) function A Media Gateway Controller (MGC) function controls a MG * Media Resource Examples of media resources are codecs, announcements, ... 2119 [1] and indicate requirement levels for the protocol Definitions * Connection Under the control of a Media Gateway Controller (MGC), the Media Gateway (MG) realizes connections In this document,...

Ngày tải lên: 23/03/2014, 03:20

... ACC—Accounting Gateway collecting start and end accounting information Media Gateway Control Protocol Media Gateway Control Protocol (MGCP) controls VoIP through external call -control elements ... 12-8 Endpoint Types Gateway Trunk gateway (ISUP) Trunk gateway (MF) Network Access Server (NAS) NAS/VoIP gateway Access gateway (VoIP) Access gateway (VoIP, NAS) Residential gateway Announcement ... egress gateway to a different egress gateway, for example • DeleteConnection— Call agents and gateways use this command to disconnect existing connections These five functions control gateways...

Ngày tải lên: 30/09/2013, 05:20

... truyền tải: TCP, UDP với khái niệm truyền đa điểm multicast 1.3 Giao thức TCP: ( Transmision Control Protocol) TCP giao thức kiểu có liên kết (Connection Oriented), tức phải có giai đoạn thiết ... liệu bit URG để báo liệu khẩn cần đợc chuyển gấp 1.2 Giao thức UDP: (User Datagram Protocol) UDP (User Datagram Protocol) giao thức kiểu không kết nối, đợc sử dụng số yêu cầu ứng dụng thay cho ... nguồn tới địa Transport address đích RTP media type: Đây tập loại tải có số tính chất đợc mang phiên truyền RTP Trong hội thảo đa phơng tiện ta có hai loại RTP media type video-MPEG2 audio-PCMA Cụ...

Ngày tải lên: 07/08/2013, 14:51

Ngày tải lên: 29/09/2013, 20:20

... intradomain protocols n Determine the current situation and protocols for interdomain multicasting Copyright © 2000, Cisco Systems, Inc IP Multicast Distribution Trees and Control Protocols 2-27 ... routing protocols, which are: n DVMRP n MOSPF n PIM-DM Copyright © 2000, Cisco Systems, Inc IP Multicast Distribution Trees and Control Protocols 2-31 DVMRP is a Distance vector based multicast protocol ... Multicast Distribution Trees and Control Protocols 2-41 MOSPF is an extension to the OSPF unicast routing protocol It depends on OSPF as the accompanying unicast routing protocol Multicast information...

Ngày tải lên: 11/12/2013, 14:15

... bảo EIGRP có module chính: + Protocol- Dependent Modules + Reliable Transport Protocol (RTP) + Neighbor Discovery/ Recovery + Diffusing Update Algorithm (DUAL) a/ Protocol- Dependent Modules EIGRP ... động redistribution IGRP IGRP process có autonomous system b/ Reliable Transport Protocol Reliable Transport Protocol (RTP) qun lý việc phân phát packet EIGRP Reliable có nghĩa phân phát đảm ... Chính đặc trưng làm EIGRP tốn bandwidth distance vector protocol Do EIGRP chạy đường truyền có bandwidth thấp Không mà đường truyền bandwidth thấp ta điều...

Ngày tải lên: 12/12/2013, 17:15

... Maintenance Protocol (RTMP) The IP implementation redistributes routes learned from OSPF, Routing Information Protocol (RIP), IS-IS, Exterior Gateway Protocol (EGP), or Border Gateway Protocol (BGP) ... Enhanced Interior Gateway Routing Protocol (EIGRP) q AS number of the destination q Configurable administrator tag q ID of the external protocol q Metric from the external protocol q Bit flags ... Interior Gateway Routing Protocol (EIGRP) estimate an optimal retransmission interval Topology Tables The topology table contains all destinations advertised by neighboring routers The protocol- dependent...

Ngày tải lên: 18/01/2014, 05:20

... làm giao thức cho mạng Windows2000 TCP/IP tập hợp nhiều protocols, mà số có Protocols chánh sau đây: • • • • • • TCP (Transmission Control Protocol) : Chuyên việc nối hosts lại bảo đảm việc giao ... biệt Network gọi Gateway (cổng liên hệ bên ngoài) Tỷ thư từ Ðồng Tháp muốn ngoại quốc phải qua Gateway Thành phố HCM Tương tợ vậy, Network bên có Gateway để đón nhận message từ Gateway bên nầy ... chỗ mở kiện hàng IP (Internet Protocol) : Lo địa chuyển hàng hướng, đến nơi, đến chốn SMTP (Simple Mail Transfer Protocol) : Chuyên việc giao Email FTP (File Transfer Protocol) : Chuyên việc gởi File...

Ngày tải lên: 19/01/2014, 04:20

... Interior Gateway Routing Protocol (EIGRP) As internetworks grew in scale and diversity in the early 1990s, new routing protocols were needed Cisco developed Enhanced Interior Gateway Routing Protocol ... the primary path fails Protocol- Dependent Modules EIGRP is one of the few routing protocols that can work with multiple routed protocols Cisco implements what it calls protocol- dependent modules ... for that protocol will be set to the distance value For a specific example and more practice with the distance command, see Chapter 10, “Distance Vector Protocols: Interior Gateway Routing Protocol...

Ngày tải lên: 24/01/2014, 19:20

... Character-oriented Protocols – Half-duplex Protocols  BSC 27 Character-oriented Protocols – Half-duplex Protocols  BSC  Protocol operation 28 Character-oriented Protocols – Half-duplex Protocols  ... Character-oriented Protocols – Half-duplex Protocols  BSC 30 Character-oriented Protocols – Half-duplex Protocols  BSC  Protocol performance 31 Character-oriented Protocols – Duplex Protocols  A ... Character-oriented Protocols – Half-duplex Protocols  BSC:  Frame format  Data  supervisory 24 Character-oriented Protocols – Half-duplex Protocols  BSC 25 Character-oriented Protocols – Half-duplex Protocols...

Ngày tải lên: 30/03/2014, 07:20

... are used in the protocol for the analysis of the S-phase checkpoint control Human fibroblasts GM847 and GM847/ATRkd are used for illustrating radiation-dose-dependent G2-checkpoint control GM847 ... ATR in doxycycline-free medium GM847 lacks the G1-checkpoint control, and GM847/ ATRkd are deficient in G2-checkpoint control (9) 2.2 Media, Reagents, and Solutions 2.2.1 Cell Culture (see Note ... Atlanta Biologicals (Norcross, GA), Invitrogen (Carlsbad, CA), Mediatech (Herndon, VA), Sigma-Aldrich (St Louis, MO), Specialty Media (Phillipsburg, NJ) Sterile phosphate buffered saline (PBS)...

Ngày tải lên: 10/04/2014, 11:12

... Các giao thức sử dụng UDP thờng gặp: Trivial File Trasfer Protocol (TFTP) Simple Network Management Protocol (SNMP) Dynamic Host Control Protocol (DHCP) Domain Name System (DNS) 12 Port x TCP/IP ... data-link (MAC) Tại ? Rensselaer x 21 22 23 x IP : Routed Protocol (Routable) x Routed (Routeable) Protocol Routing Protocol x Routing Protocol: RIP, IGRP, OSPF, EIGRP 24 Địa IP x IP nằm lớp ... Chiều ngợc address resolution cần đĩa máy trạm thực boot 38 Address Resolution Protocol- ARP x Address Resolution Protocol đợc dùng host gửi biết địa IP đích đích đến nhng cần biết địa Ethernet...

Ngày tải lên: 14/06/2014, 15:56

... intermediate node must prevent other packets from passing through the failed route In addition, if at any intermediate node an alternate route to the destination is available, then the intermediate ... activation of congestion control In [23], it is stated that one of the ways to inform a TCP sender about route failure is to use a ‘host unreachable’ ICMP (internet control message protocol) message ... losses In TCP-BuS, the associativity-based routing protocol (ABR) [26] is the underlying routing protocol which is a source-initiated ondemand routing protocol TCP-BuS is a feedback mechanism based...

Ngày tải lên: 21/06/2014, 00:20

... current state-of-the art MAC protocols and the Ideal-MAC protocol The analysis results indicated that the energy efficiency of the designed MAC protocol is better than existing protocols in various traffic ... is concluded in Section Related Research MAC protocols have been typically categorized into contention and contention-free protocols In contention protocols, nodes compete for a shared channel, ... contention-free protocols, as the bandwidth is divided among nodes on-demand basis However, contention protocols suffer from collisions and high idle listening Still, while the contention-free protocols...

Ngày tải lên: 21/06/2014, 11:20

... avoidance and control protocols, rate adjustment mechanisms, fairness schemes, and transport protocols for wireless sensor networks are reviewed In [8, 9], the major issues of transport layer protocols ... traditional protocol stack These approaches include hop-by-hop flow control based on buffer occupancy, rate limiting to implement fairness, and a prioritized medium access control (MAC) protocol that ... control, fair event reporting, and rate adjustment are presented Basic network setup, system definitions, and assumptions for MCCP protocol are presented in Section The operation of the MCCP protocol...

Ngày tải lên: 21/06/2014, 23:20

... strategies applied to channel access: contention-based protocols, TDMA-based protocols, and slotted protocols As a contention-based energy-efficient MAC protocol, 802.11 [11] standard is based on carrier ... ASMAC protocols, respectively Simulation results are given in Section Section concludes this paper RELATED WORKS AND PRELIMINARIES 2.1 Energy-efficient MAC protocols In contrast to typical MAC protocols ... uncertain problems, we propose two energy-efficient MAC protocols for WSNs: asynchronous MAC (A-MAC) protocol and asynchronous schedule-based MAC (ASMAC) protocol Our timing-rescheduling scheme and time-slot...

Ngày tải lên: 22/06/2014, 22:20

... underlying protocol multiflow real-time transport control protocol (MRTCP), which establishes multiple flows at the transport layer The MRTP tries to use multiple paths in the network Although the protocol ... extensions to the TCP and termed the new protocol TCP-ELFN In their protocol, the sender probes the network to check the path status In the TCP-ELFN protocol, neighbors take an active part and ... The routing protocol used at the network layer also plays an important role in ad hoc networks A robust routing protocol increases path availability Recent proposals for routing protocols maintain...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/08/2014, 05:06

... tự quản(autonomous system) Thông thường gateway router để Phần mềm Cisco IOS chọn đường số đường ngoại vi IGRP để làm gateway Router sử dụng đến đường gateway mạng đích mạng không kết nối trực ... trường Protocol number - IGRP sử dụng khái niệm Autonomous System (AS)_AS number vùng định tuyến có chung sách định tuyến, IGRP AS IGRP process domain_tập hợp router có chung routing protocol ... tìm đường khác để đến mạng đích Nếu hệ tự quản có nhiều đường ngoại vi để kết nối router chọn cho gateway khác a IGRP Timer - Chu kỳ update IGRP 90 giây, IGRP có sử dụng nhân tố random 20% để ngăn...

Ngày tải lên: 18/03/2015, 17:52