Mini Gateway Framework and Voice over
Packet Software Solutions from Aricent
provide a complete set of building blocks for quickly
developing Next Generation Solutions. The solutions
meet the carrier class requirements of redundancy, scalability
and reliability.
Aricent Mini Gateway Framework can be used
to build a Monolithic Gateway that implements both call
signaling and media signaling. Mini Gateway Framework
is suited to network architectures where, the call intelligence
is embedded in each network entity. The Mini Gateway
framework provides inter-working of legacy protocols
like POTS and ISDN with emerging packet protocols like
H.323 and SIP and enables voice and fax connectivity
to a set of users (H.323/SIP or ISDN/POTS) in a small
office home office applications.
The following picture depicts a typical
application of the Mini Gateway and its interfaces with
other elements of a next generation network.
Mini
Gateway Framework Functions
Support for multiple PDN signaling
protocols - H.323 and SIP with Mini Gateway
Supports multiple SCN signaling protocols
- FXS and FXO signaling with Loop start and Ground
Start and ISDN signaling
Control of DSP firmware for media
processing functions
Mini Gateway resource Management
Mini Gateway address translation
Network Management API
Mini Gateway
Architecture
A high level architecture of the Aricent Mini
Gateway Framework is depicted below:
Call Agent Module performs call control
and inter-working between packet and SCN signaling protocols.
The module interfaces to the Signaling Stacks (H.323
stack, POTS Stack, SIP stack, ISDN stack).
Bearer Control Module maps bearer channels
on the SCN side (like ISDN Channels/Time Slots) with
the RTP/RTCP streams/sessions on the packet side. The
Bearer control module interfaces with the Call Agent
module.
H.323 Signaling Adaptation Module &
H.323 Signaling Stack provides signaling interface to
the Call Agent. It interfaces with the H.323 Signaling
Stack that implements the H.323 standards of the ITU-T.
The stack implements the call signaling, RAS (registration,
admission and status) and capability negotiation functions
only.
POTS Signaling Adaptation Module provides
POTS Signaling interface to the Call Agent. It interfaces
with a POTS Stack that implement the FXS and FXO signaling
protocol and supports both loop start and ground start
modes of operation.
ISDN Signaling Adaptation Module provides
ISDN Signaling interface to the Call Agent. It interfaces
with the ISDN Signaling Stack module that implements
the ISDN Layer 3 protocol functionality as defined in
Q.931.
SIP Signaling Adaptation Module &
SIP Signaling Stack provides SIP Signaling interface
to the Call Agent. It interfaces with the SIP Signaling
Stack that implements the SIP signaling protocol as
defined in IETF RFC 2543.
