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Advanced Voice Features Provide Superior Caller Experience
The extensive features of the Dialogic 2000 Media Gateways can help build a reliable, high-quality VoIP application. The gateways provide the interoperability needed for high-quality media streaming with a wide variety of industry-standard IP endpoints by supporting advanced coders including:
- G.711 (packet size 10 ms, 20 ms, and 30 ms)
- G.723.1
- G.729ab
Echo cancellation is essential for packet-switched networks to carry voice traffic successfully. The gateways conform to ITU G.168 echo cancellation with a tail length up to 128 ms. Voice quality is further enhanced with features such as comfort noise generation, silence detection, and adaptive jitter buffering.
The gateways have QoS features, including type of service (TOS)/IP precedence, and DiffServ, providing a low-latency, high-reliability path for sensitive voice traffic through today’s networks. In addition, the gateways support advanced call progress analysis on all channels.
Configurations
The 2000 Media Gateways provide a cost-effective way to connect various IP end points to the circuit-switched network
(see Figure 1), eliminating the need to swap out legacy PBXs and helping to protect telecom investment.
The Dialogic 2000 Media Gateways along with Dialogic HMP software support the development of cost-effective IP
media servers accessible from both PSTN and IP networks (see Figure 2). IP media servers can provide a central and
efficient messaging server in existing time division multiplex (TDM) voice infrastructures by servicing remote locations via an IP network.
Media gateways help service providers and enterprises offer cost-saving voice, data, and multimedia convergence services. One such solution is an application for telecommuters.
The number of employees working from home on a permanent or periodic basis continues to rise. These employees need full access to company voice and data services. By installing a Dialogic 2000 Media Gateway (see Figure 3), employees working from home can have the same telephony experience as their counterparts in the corporate office. They can make and receive calls and access other features such as voice mail from home, just as if they were in the office.
Their office extension can be bridged onto a gateway port so that their phone rings, no matter where they are working. This enhances productivity, reduces costs, and improves both customer and employee satisfaction.
Technical Specifications
TDM Port Density by Model
DMG2030DTI: 1 T1 or 1 E1
DMG2060DTI: 2 T1 or 2 E1
DMG2120DTI: 4 T1 or 4 E1
IP Channel Density by Model
DMG2030DTI: 30
DMG2060DTI: 60
DMG2120DTI: 120
Connectors: RJ-45 jacks
Network Interfaces: 10/100 BaseT Ethernet LAN port
Connector: 1 shielded female RJ-45 jack for LAN
Configuration and Management: Web browser with context-sensitive Help facility, Telnet, BOOTP client and TFTP client built-in SNMP v1 read-only for alarm reporting
Call Routing: Round Robin via IP load balancing
IP Security: TLS for SIP messages, SRTP for media stream, HTTPS for web interface
Power Requirements
Line voltage 90VAC to 264VAC
Frequency 47 Hz to 63 Hz
Physical Dimensions
Height: 1.68 in. (4.27 cm)
Width: 19 in. (48.26 cm)
Length: 14.2 in. (36.07 cm)
Weight: 11.1 lbs (5.03 kg)
Protocol Support
Serial: MCI, MD-110, SMDI
T-1 ISDN: 5ESS, DMS100, NI2, QSIG
T-1 CAS: E&M, GroundStart, LoopStart
E-1: EuroISDN, QSIG
VoIP: Call transfer/call hold/message waiting indicator), SIP per RFC 3261, RTP/RTCP for delivery of voice
FoIP: T.38 FoIP emulating units transcode fax from T.30 fax protocol, supporting V.21, V.27,V.29, and V.17 modulation schemes, to T.38 for transmission over a packet network
Security: SRTP, HTTPS, TLS
Voice Support: G.711 Ulaw and A-law, G.723.1, G.729ab, Silence suppression with comfort noise, Dynamic jitter buffer, G.168 automatic echo cancellation
Quality of Service: Type of service (ToS)/IP precedence, DiffServ
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