H.248
OAA000005 H.248/MeGaCo protocol
ISSUE 2.0
Fixed Network Curriculum Fixed Network Curriculum Development Section Development Section
Objective
After this session, you will learn:
Functions of H.248/MeGaCo protocol H.248/MeGaCo commands Meanings and usage of parameters in H.248/MeGaCo commands Message interaction process of
H.248/MeGaCo protocol
2
References
Product Manual -- Technical Manual – Signaling and Protocols -- Chapter 4 H.248 Protocol
3
About this session
Section 1 Overview
Section 2 Message Structure
Section 3 Call Flow
4
Bearer Control Protocols
Bearer control protocols are used for the communication between Media Gateway Controller (MGC) and Media Gateway (MG). As the control-layer supports equipment, two bearer
SoftX3000
control protocols: MGCP and H.248.
5
Concept
H.248 and MeGaCo refer to the same kind of protocol. It is an achievement from the efforts of both ITU and IETF. It is named H.248 by ITU-T and MeGaCo by IETF. H.248 comes into being on the basis of MGCP and is combined with features of other media gateway control associated protocols. The function structure of H.248 is similar to that of MGCP. In NGN, both H.248 and MGCP can be used between SoftX and most components. MGCP is deficient in its descriptive capability, which restricts its applications in large gateways. For those large-scaled gateways, H.248 is a much better choice. MGCP message transportation depends on UDP packets over IP network, and H.248 signaling messages may be based on multiple bearers such as UDP/TCP/SCTP.
6
H.248 Implementation in SoftX3000
23 /H.3 IP CP/S MG
CP G M
MRS
IP Core
MG CP/ H.2 48
SoftPhone
ra ig t S
n
8 . 24 H
SS7
PSTN
IAD
E1
TMG8010
E-phone
E-phone
7
Terms
Media Gateway (MG):
An MG converts media provided in one type of network to the format required in another type of network.
Media Gateway Controller (MGC):
It controls the call
ISSUE 2.0
Fixed Network Curriculum Fixed Network Curriculum Development Section Development Section
Objective
After this session, you will learn:
Functions of H.248/MeGaCo protocol H.248/MeGaCo commands Meanings and usage of parameters in H.248/MeGaCo commands Message interaction process of
H.248/MeGaCo protocol
2
References
Product Manual -- Technical Manual – Signaling and Protocols -- Chapter 4 H.248 Protocol
3
About this session
Section 1 Overview
Section 2 Message Structure
Section 3 Call Flow
4
Bearer Control Protocols
Bearer control protocols are used for the communication between Media Gateway Controller (MGC) and Media Gateway (MG). As the control-layer supports equipment, two bearer
SoftX3000
control protocols: MGCP and H.248.
5
Concept
H.248 and MeGaCo refer to the same kind of protocol. It is an achievement from the efforts of both ITU and IETF. It is named H.248 by ITU-T and MeGaCo by IETF. H.248 comes into being on the basis of MGCP and is combined with features of other media gateway control associated protocols. The function structure of H.248 is similar to that of MGCP. In NGN, both H.248 and MGCP can be used between SoftX and most components. MGCP is deficient in its descriptive capability, which restricts its applications in large gateways. For those large-scaled gateways, H.248 is a much better choice. MGCP message transportation depends on UDP packets over IP network, and H.248 signaling messages may be based on multiple bearers such as UDP/TCP/SCTP.
6
H.248 Implementation in SoftX3000
23 /H.3 IP CP/S MG
CP G M
MRS
IP Core
MG CP/ H.2 48
SoftPhone
ra ig t S
n
8 . 24 H
SS7
PSTN
IAD
E1
TMG8010
E-phone
E-phone
7
Terms
Media Gateway (MG):
An MG converts media provided in one type of network to the format required in another type of network.
Media Gateway Controller (MGC):
It controls the call