Chapter 5 Mgcp And Sip; Using Mgcp And Sip With The Mrs6100; Mgcp; Brief Introduction - Huawei U-SYS MRS6100 Technical Manual

Technical Manual
U-SYS MRS6100 Media Resource Server

5.1 Using MGCP and SIP with the MRS6100

Figure 5-1 Using the MGCP and SIP with the MRS6100
As shown in Figure 5-1, the MRS6100 can be controlled by the SoftSwitch or the AS.
The control protocols include the MGCP, SIP, and the H.248.
Under the control of the SoftSwitch, the protocols are used in the services
provided by the SoftSwitch, such as basic call services and supplementary
services.
Under the control of the AS, the protocols are used in the services provided by
the AS, such as conferences, voice e-mail, and uniform communications.

5.2 MGCP

5.2.1 Brief Introduction

RFC2705 defines the API and the related MGCP. The MGCP is used to control the
voice over IP (VoIP) gateways from external call control units.
The MGCP defines a call control structure. In this structure, call control is separated
from the service bearer. As shown in Figure 5-2, the call control function is separated
from the media gateways (MG). The function is implemented by the external call
control unit, such as the media gateway controller (MGC) or the call agent (CA). The
MG executes the commands sent from the MGC. Therefore, the MGCP is essentially
a master/slave protocol.

Chapter 5 MGCP and SIP

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Chapter 5 MGCP and SIP