Gateway sits between the IP network (using SIP signaling) and PSTN
network (using ISUP signaling). The PSTN Gateway performs the
interworking between SIP and ISUP protocols.
DRM IP Trunking
The DRM IP Trunking (99-5E-8645) feature extends SIP-T signaling
and OIU-IP packet trunking to the DRM.
Feature descriptions for the features listed above can be found in the
Feature Descriptions, 235-190-400 document.
Benefits
SIP is an emerging IP-based protocol that is critical for deploying
converged and next generation real-time voice, data and video
communication services. SIP for Packet Trunking gives the 5ESS
®
switch direct access to more efficient IP transport networks. It allows
for the utilization of more cost-effective revenue-generating services.
It also can be used to expand trunking capacity or to replace existing
circuit trunks.
SIP for Packet Trunking:
• reuses the embedded network equipment to migrate to an all IP
multimedia network,
• provides high quality service with 99.999% hardware and
software reliability,
• reuses existing integrated 5ESS
®
switch OAM&P interfaces,
• supports inter-operability with other vendors equipment through
development based on industry standards,
• reuses existing switch hardware and software infrastructure,
• interfaces with the TDM-based PSTN trunks or next generation
IP network virtual trunks, and
• can use SCTP to provide additional network security.
Differences
The existing TDM network contains dedicated circuits between two
end-points. IP calls have no fixed connections. Calls are dynamically
routed through the packet network based on available bandwidth. The
connection information is exchanged using SIP signaling.
The migration from an expansive SS7-based signaling transfer point
(STP) network to an IP-based signaling network will be ongoing. As
SIP evolves, more capabilities will be defined and added.
SIP for Packet Trunking
Overview
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1-4
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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