Terminologies That You Should Know - Huawei U-SYS MRS6100 Technical Manual

Technical Manual
U-SYS MRS6100 Media Resource Server
Figure 5-2 MGCP

5.2.2 Terminologies that You Should Know

I. Gateway
The gateway is a network element that implements interconnection and interworking
between networks with different architectures. In the NGN, the NGN interconnects
with other networks through the gateways likes TMG, AMG, or UMG.
II. Call agent
The call agent (CA) provides signaling and call processing functions. It is an external
call control element used to control the telephony gateways.
III. Endpoint
The endpoint is the data source or data sink. It can be a physical link or a virtual link
running on the physical link.
For example, the interface through which the trunk gateway terminal connects with
the PSTN exchange and the E-phone interface that the access gateway connects are
physical endpoints. The audio source in the MRS is a virtual endpoint.
To create a physical endpoint, you need to install the related hardware. To create a
virtual endpoint, you do not need to do so. You can use the related software to create
a virtual endpoint.
IV. Endpoint identifier
Endpoints are identified by endpoint identifiers. Endpoint identifiers are not case
insensitive.
An endpoint identifier consists of two parts:
The local name of the endpoint in the gateway, and
The domain name of the gateway.
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Chapter 5 MGCP and SIP