Protocolo H.248 (MEGACO)

H.248 (también conocido como protocolo Megaco) es el estándar que permite que un media gateway controller (MGC) contre a media gateways (MG). H.248 es el resultado de la cooperación entre la ITU y el IETF. Antes de lograr esta cooperación existían varios protocolos similares compitiendo entre si, principalmente MGCP (la combinación de SGCP e IPDC) y MDCP. H.248 se considera un protocolo complementario a H.323 y SIP, un MGC controlará varios MGs utilizando H.248, pero será capaz de comunicarse con otro MGC utilizando H.323 o SIP.

Si deseas tener una visión más global, a nivel de arquitectura, consulta el documento H.323v4, que podrás encontrar en la sección Protocolos H.323.

H.248 Standards For a history of previously approved documents and for current work in progress, please refer to the document status page. Draft H.248 Core Documents H.248 Version Draft H.248 ASN.1 File Implementers Guide Version 1 H.248.1v1 H248v1.asn Complete Text Version 2 H.248.1v2 (Corrigendum 1) H248v2.asn (hypertext) Complete Text Version 3 H.248.1v3 (Amendment 1)   Complete Text NOTE: The Implementers Guide must be read along with the standards. Important ITU-approved corrections are found in those documents. Other Related Draft Recommendations H.248.2 Facsimile, Text Conversation, and Call Discrimination Package (Also Amendment 1) H.248.3 User Interface Elements and Action Packages (Corrigendum 1) H.248.4 Transport over SCTP (Corrigendum 1) H.248.5 Transport over ATM H.248.6 Dynamic Tone Definition Package H.248.7 Generic Announcement Package (Corrigendum 1) H.248.8 Error Code and Service Change Reason Description H.248.9 Advanced Audio Server Package (Amendment 1) H.248.10 Media Gateway Resource Congestion Handling Package H.248.11 Media Gateway Overload Control Package H.248.12 H.323 and H.324 Interworking Package (Annex A*) (Amendment 2) H.248.13 Quality Alert Ceasing Package H.248.14 Inactivity Timer Package H.248.15 SDP H.248 Package Attributes H.248.16 Extended DTMF Detection Package (Corrigendum 1) H.248.17 Line Test Package* (Corrigendum 1) H.248.18 Package for Support of Multiple Profiles* H.248.19 Decomposed MCU, Audio, Video, and Data Conferencing Package (Amendment 1) H.248.20 The use of Local and Remote Descriptors with H.221 & H.223 multiplexing* H.248.21 Semi-permanent Connection Handling Package H.248.22 Shared Risk Group Package H.248.23 Enhanced Alerting Package H.248.24 Multi-Frequency Tone Generation and Detection Packages H.248.25 Basic CAS Packages H.248.26 Enhanced Analog Line Packages (Corrigendum 1 and Amendment 1) H.248.27 Supplemental Tones Packages H.248.28 International CAS Package H.248.29 International CAS Compelled Register Signalling Packages (Corrigenda 1) H.248.30 RTCP XR Packages H.248.31 Adaptive Jitter Buffer Package H.248.32 Detailed Congestion Reporting Package H.248.33 PCM Frame Spare Bit Package H.248.34 Stimulus Analogue Lines package H.248.35 Coin package H.248.36 Hanging Termination Detection Package H.248.37 IP NAPT Traversal Package H.248.38 Base Context Package H.248.39 H.248 SDP Parameter Identification and Wildcarding H.248.40 Application Data Inactivity Detection Package H.248.41 IP Domain Connection Package H.248.42 DCME Interworking Package H.248.44 Multi-Level Precedence and Pre-emption Package H.248.45 MGC Information Package H.248.46 Connection Capability Control Package H.248.47 Statistic Conditional Reporting Package H.248.49 SDP RFC and Capabilities Packages H.248.51 Termination Connection Model Package H.248.54 MPLS Support Package H.248.56 Packages for VPN Support H.248.59 Event Timestamp Notification Package * Estos documentos fueron renombrados en Febrero 2002 como se indica en la siguiente tabla: H.248 Annex Renumbering Old Name New Name H.248 H.248.1 Annex F H.248.2 Annex G H.248.3 Annex H H.248.4 Annex I H.248.5 Annex J H.248.6 Annex K H.248.7 Annex L H.248.8 Annex M.1 H.248.9 Annex M.2 H.248.10 Annex M.4 H.248.12 Annex M.5 H.248.13 Annex M.6 H.248.14 Annex N H.248.15