SmartNode™ S-DTA
ISDN BRI VoIP Gateway
The S-DTA brings all advantages of VoIP to ISDN users. It connects multiple terminals or a PBX to its BRI So bus, and converts 2 concurrent voice or fax calls to SIP or H.323--at an incredibly low price.
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  • Instant ISDN to VoIP Connectivity--Provides one powered So bus for up to 8 terminals or a PBX. Simultaneously converts 2 voice and fax calls to VoIP.
  • Transparent Telephony Features--Preserves ISDN features like caller ID and name (CLIP/CLIR), call transfer, hold, waiting, charging information (AOC) and much more.
  • Outstanding Interoperability--Interoperable for voice and fax calls with a wide variety of ISDN terminals, PBXs, as well as SIP and H.323 soft switches and application servers.
  • Full SIP and T.38 support--Complete range of industry standard signaling protocols supported: SIPv2, H.323v4, MGCP/IUA, ISDN, DSS1, T.38, fax and modem bypass, DTMF relay.
  • Integrated Management and Provisioning--HTTP GUI for easy end-user setup, fully automated provisioning system and SNMP management for mass deployment.


The Smart-DTA enables integration of ISDN network users into a local VoIP phone service, or extends an ISDN line of a PBX to a remote site over IP. It offers a simple end-user configuration interface and connects both to a PBX in point-to-point mode and an So bus in point-multipoint mode.

Unlike most other products on the market, Patton’s intelligent call routing technology does not only offer simple ISDN to VoIP, but also advanced features like number plan adaptations, mappings between ISDN and SIP/H.323, manipulation of call properties through regular expressions, routing calls based on time-of-day or bearer capability criteria and much more.

Providing power to the ISDN line, the S-DTA eliminates the need for an external power supply to provide power to the terminals. Gateway functions use standard CODECs such as G.723, G.729, and T.38 fax as well as industry standard SIP, H.323 and MGCP/IUA signaling protocols to ensure seamless connection and compatibility for all voice services. Quality of service (QoS) features complete the offering with advanced voice prioritization and traffic management including VLAN tagging, 802.1P/Q and DSCP.


Network Integration
SmartNode S-DTA application diagram
Patton’s Smart Digital Telephony Adapter provides seamless access to Internet telephony services for ISDN terminals and PBXs. The S-DTA connects to any LAN or broadband access provider via modem.



WAN Connectivity

10/100Base-T Ethernet WAN • Auto-MDI-X • DHCP Client • PPPoE Client (multi-session) • SNTP • IP Multi-Netting

IP Quality of Service IEEE 802.1p, TOS, DiffServ Labeling • IEEE 802.1Q, VLAN Tag insertion/deletion (4,096 VLANs)
Call Routing & Services Regular expression number matching • Regular expression number manipulation • Least Cost Routing • Number blocking • Short-Dialing • Digit collection • Distribution- and Hunt- Groups
Management Web-based GUI • Fully documented CLI • Telnet and HTTP access • TFTP configuration up- and download • TFTP firmware upgrade • SNMPv1 agent, MIB II and enterprise MIB • Built-in diagnostic tools • Auto-Provisioning—Configuration and Firmware
Fax and Modem Support T.38 fax over IP • Fax relay and bypass • Modem bypass
ISDN Specification 1 port Euro-ISDN BRI/So RJ-45, NT • DSS-1, Q.921, Q.931 • Point-point & point-multipoint
Voice Signaling SIPv2 • H.323v4 • MGCP/IUA • SIP call transfer, redirect • Overlap or en-bloc dialing • DTMF in-band & out-of-band • Configurable call progress tones
Call Routing & Services Regular expression number matching • Regular expression number manipulation • Least Cost Routing • Number blocking • Short-Dialing • Digit collection • Distribution- & Hunt-Groups • 2nd call offering
Voice Processing G.723.1 (5.3/6.3 kbps) • G.729, G.729a, G.729ab (8 kbps) • G.726 ADPCM (16 ,24, 32, 40 kbps) • G.168 echo cancellation (25ms) • Transparent ISDN data • Silence suppression and comfort noise • Adaptive and configurable dejitter buffer • Configurable packet length
Power & Packaging Dimensions: 4.2W x 1.5H x 5.0D in. (10.6W x 3.9H x 12.7D cm) • Weight: < 15.9 oz (450 g) • Power Consumption < 4W
Environment Temp.: 32–104°F (0–40°C) • Humidity: up to 90%, non condensing
Compliance CE per RTTE 99/5/EC (EMC class A and LVD) • Safety - EN60950 • TBR-3 (ISDN BRI/So)


S-DTA/EUI Smartnode 1 BRI VoIP Gateway with line power, 10/100baseTX WAN, H.323 or SIP, External UI Power.

Data Sheet Model S-DTA Datasheet
User Manual Smart-DTA (B) Guide, Getting Started
Manuals Vita IP Network Access Catalog Vita IP Connectivity Catalog

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