Lucent Network Gateway
The Lucent Network Gateway is the media gateway component in Lucent’s IP
MultiMedia Subsystem (IMS) Portfolio. As the cornerstone of the converged
network, it seamlessly and economically merges the traditional PSTN with
proliferating IP networks. Because it is bearer protocol agnostic,
the Network Gateway supports a wide variety of wireline and wireless
applications. Converged applications may be combined in the same gateway
enabling TDM, ATM and IP access along with traditional TDM trunking to
the PSTN/GSTN. The Network Gateway also provides wireless access to
the Radio Access Network for both a GSM (A interface) and UMTS
(Iu-CS interface) wireless system and may also be used in a 3GPP R5
environment as the media gateway for an IP Multimedia Subsystem.
Technical Specifications
Features
Description
• Bearer protocol agnostic
• Wireline/wireless packet codec support
1. Protocol Support
• ITU-T H.248, IUA, LAPD, CAS (FG-D, Line Signaling)
• RTP/UDP/IP/GigE or ATM; ATM UNI, AAL2 and AAL5
• Standardized protocols and open
interfaces support
2. Bearer Support
• 21,000+ VoIP or VoATM channels,
fully protected
• TDM: G.711, u-law and a-law
• IP/ATM: G.711, G.726, G.729a, G.723.1, Clearmode, AMR, EVRC*
• Echo: G.168, G.164, G.165, up to 128ms tail
• Silence suppression/comfort noise generation
• Fixed and adaptive jitter buffer
• 80,000+ TDM channels,
fully protected
Benefits
• Standard and custom announcements
• High density
• Call progress tones
• Multi-protocol, mutli-application
• Open, scalable
• Support of bearer path packet duplication for a CALEA/LI and handover solutions
• Ability to interconnect with a CALEA/LI server via supported interfaces
3. Capacity
• Latency-free TDM switching
• 21,504 VoIP or VoATM channels, fully protected
• 80,640 TDM channels, fully protected
• Complete range of packet and
legacy interfaces
4. Redundancy and Availability
• 1:N redundant Voice over Packet server modules
• 1:N redundant TDM I/O modules (electrical)
• 1+1 TDM I/O modules (optical)
• 1:1 Ethernet I/O modules
Applications
• Class 5 end office, Class 3 or 4
tandem switching
• Simultaneous legacy and IP access
support
• 1+1 ATM AAL2 modules
• Media Gateway for GSM and UMTS
Radio Access Network
• 1:1 System Processor modules
• 1:1 Switch Fabric modules
• 3GPP/3GPP2 IMS Media Gateway
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