SmartNode™ 4520 Series
Analog VoIP Router with up to 8 FXS/FXO ports
The SmartNode 4520 ToIP Gateway-Router supports up to eight FXS or FXO telephone connections. Combine Voice over IP with advanced Quality of Service (QoS) and full Internet access and security features to provide best in class service and voice quality. This integrated access router and VoIP Gateway benefits both service providers and enterprise network administrators with a lower cost of ownership and better service quality.
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  • Dual 10/100 Full-Duplex Auto-Sensing Auto-MDX Ethernet
  • 14 LEDs for System, Ethernet, and Call status
  • Universal 100-240VAC (contact us for 48VDC Power)
  • Configuration and Management through Webinterface, CLI, Telnet, Console and SNMP
  • IP routing and Services, NAT/PAT, DHCP Server, PPPoE, IP Filter Lists provide full Internet access capabilities and security
  • Advanced QoS and traffic management. Voice-priority, traffic shaping to ensure optimal up and downstream voice quality
  • Up to 8 Voice and FAX Calls over IP Support-Use any CODEC or T.38 FAX on any port, any time
  • 2,4,6 or 8 FXS and 2,4 FXO Ports-Up to 8 FXS ports connect to your standard telephone with programmable tones, ringing, CLIP etc. 2 or 4 FXO ports for PSTN connections. Programmable call routing switches between any FXS, FXO and IP connection.
  • Toll Quality CODECs & T.38 FAX-Use standard G.711 or G.726 Codecs for toll-quality or G.723.1 or G.729ab for low-bandwidth applications. T.38 FAX and FAX Bypass features allow high-quality fax.
  • H.323v4, SIP Signaling-Deploy into any enterprise or carrier softswitch network with the leading call and session signalling protocols. Maximize Interoperability to create advanced multimedia and messaging services.
  • IPSEC VPN, Encryption, & VLAN-Connect your telephone to IP and secure your calls with optional IPSEC. Choose DES/3DES or AES for encryption. VLAN tagging/stripping allows interfacing into your 802.1pQ network.
  • Full ToIP™ Call Switching-Enhanced circuit-switched call routing allows user programmable and adaptive call handling based on hunt groups, caller/called ID, and time of day.


Connect with confidence using the SmartNode 4520 VoIP Gateway Router. Integrating a complete enterprise router with a full-featured Voice-over-IP Media Gateway offers the new standard in toll-bypass, remote/branch office connectivity, and enhanced carrier services. Perfect for the Remote office, Branch office, or PBX/Switch extension, the SmartNode 4520 integrates all your voice, FAX, and LAN traffic for seamless and secure networking.

With its FXS analog ports the SN4520 Series supports up to eight simultaneous calls, connects to any legacy telephone or PBX, and provides dial-tone, ringing, and caller-ID. When equipped with FXO ports, the local PSTN can be accessed enabling local calling, enhanced toll-bypass services, and fallback configurations. ClearConnect™ adaptive network monitoring ensures your call always gets connected even if the VoIP link goes down or becomes congested.

With dual 10/100 Ethernet ports, the SN4520 Series provides IP routing with guaranteed Quality of Service. Voice traffic is prioritized while LAN/IP traffic shaping permits efficient access to the Internet and corporate networks. As a complete enterprise router, the SN4520 supports DHCP, NAT, Firewall/ACL, and PPPoE clients. While IPSEC VPN and VLAN tunnel data while DES, 3DES or AES enables secure voice and data over the public network.
Model 4520 application diagram A

LAN/WAN QoS & Router
As an Enterprise router the SmartNode offers QoS voice, wire-speed traffic shaping, and complete network access. With dual 10/100 Eternet ports, the SmartNode connects your hosts to your LAN with VLAN tagging, DHCP server/client, and Firewall/ACL services. Use PPPoE and IPSEC VPN with DES, 3DES, and AES encryption and bring your Voice and Data to the WAN through a single and secure network connection.
Model 4520 application diagram B

Local PSTN + Packet Voice
Using Patton's SmartNode Gateway routers with FXS & FXO ports allows seamless access to both remote packet-voice and local PSTN telephony. Using ToIP call switching, distinctive ring, and Caller-ID a single handset can now access the right service at any time. With Patton’s ClearConnect™ fail-over protection your phone call will be completed. Network health monitoring and ToIP switching ensures a clear call even if the IP network is down.


Voice Connectivity • 2, 4, 6, or 8 FXS ports
  • 2-wire Loopstart, RJ-11/12
  • Short haul loop 1.1 KM @3REN
  • EuroPOTS (ETSI EG201 188)
  • Programmable AC impedence, feeding, and ring voltage; On-Hook Voltage 29VDC
  • Caller-ID Type-1/2 FSK and ITU V.23/Bell 202 generation
• 2 or 4 FXO ports
  • 2-wire loop-start presented as an RJ-11/12
  • 2.5kV line isolation Surge Protection: Voice Ports: Tip & Ring protected by 270 V side actor
  • Off-hook and ring detection, Automatic line gain, Programmable ring count
  • End of Call detection, Line drop, busy tone, battery reversal detection
  • Hook-Flash Sending, H.245 Hook-Flash relay, DTMF send, detect, and relay
  • Caller ID FSK CLI reception and relay (Bellcore/ANSI and ETSI/ITU), Call routing based on Caller ID
  • Second dial-tone for two-stage DTMF dialing, Call routing based on DTMF numbers
Data Connectivity Dual 10/100 Full Duplex, Autosensing, Ethernet RJ-45
Voice Processing (signalling dependent) • Voice codes
  • G.711 A-Law/µ-Law (64kbps)
  • G.726 (ADPCM 40, 32, 24, 16 kpbs)
  • G.723.1 (5.3 or 6.3 kbps)
  • G.729ab (8kbps)
• Up to 8 parallel voice connections
• G.168 echo cancellation
• Carrier tone detection and generation
• Silence suppression and comfort noise
• Configurable dejitter buffer
• Configurable tones (dial, ringing, busy)
• RTP/RTCP (RFC 1889)
Fax and Modem Support• G.711 Fax- and Modem-Bypass
• T.38 Fax relay (9.6 k, 14.4 k)
Voice Signalling • H.323v4
  • RAS, H.225, H.245
  • H.235 secure RAS
  • Fast-connect, early H.245
  • Gatekeeper autodiscovery, Alias registration
  • Overlap dialing
  • Empty capability set (call transfer, hold)
  • H.323v1 call transfer, hold
• SIPv2
  • Supported RFCs: 2806, 2833, 2976, 3261, 3263, 3264, 3323, 3325, 3515
  • draft-ietf-sip-cc-transfer-02, draft-ietf-sip-cc-transfer-05
  • draft-ietf-sip-refer-02, draft-ietf-sip-replaces-01
  • draft-ietf-sip-session-timer-04, draft-ietf-sip-session-timer-08
  • Caller ID, CLIR (receive from PSTN)
  • Support for proxy and redirect servers
  • RFC2833: DTMF Relay, SIP INFO DTMF Relay, Fax-Bypass (G.711), T.38 Fax-Relay
  • Session Timer, Record-Routing, Authentication
  • Compression CODECs, Fax/Modem bypass
Call Routing • Virtual Interfaces
• Routing Criteria: Called party number (Destination) Calling party number (Source) Time of day, day of week, date
• Longest prefix match, wildcard match, regular expression match
• Number Manipulation Functions: Replace numbers Add/remove digits Regular Expressions
• Fallback Routing: Soft Fallback to alternative interface or Call Router table
IP Services • IPv4 router
• Static Routes, ICMP redirect (RFC 792), RIPv1, v2 (RFC 1058 and 2453)
• Static and dynamic NAT and NAPT
• DHCP server and Client
• Access Control Lists
• IPSEC AH & ESP Modes, preshared Keys
• AES/DES/3DES Encryption
Quality of Services • Traffic classification by ACL
• TOS and DiffServ labeling Configurable TOS/Precedence bits or DiffServ codepoints
• IEEE 802.1p/Q
• Traffic scheduling: Priority, Weighted fair queuing (WFQ), Hierarchical traffic classes
• Policing of traffic classes
• DownStreamQoS™ Dynamic restriction of inbound (downstream) TCP traffic to free bandwidth for voice packets.
• Improves voice quality in the receiving direction
Management • Web GUI
• Industry standard CLI with local console (CRJ-45, RS-232) and remote Telnet access
• TFTP configuration & firmware loading
• SNMP v1 agent (MIB II and private MIB)
• Built-in diagnostic tools (trace, debug)
Operating Environment • Operating temperature: 0 - 40°C
• Operating humidity: 5 - 80% (non condensing)
System • CPU Motorola MPC875 @ 66 MHz
• Memory 32MB SDRAM/8MB Flash
• Power: External universal 100 - 240 VAC (50/60 Hz)
• Power dissipation: 4 - 12W model dependent
Compliance • EMC compliance: EN55022 and EN55024
• Safety compliance: EN 60950
• CE per RTTE 99/5/EC (EMC and LVD)
• FCC Part 15 Class A
• TBR-21 (FXS)


SN4522/JO/EUI Smartnode Dual FXO VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4522/JS/EUI Smartnode Dual FXS VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI power.
SN4524/2JS2JO/EUI Smartnode 2 FXS & 2 FXO VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4524/JO/EUI Smartnode 4 FXO VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4524/JS/EUI Smartnode 4 FXS VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4524/JS/EUIX Smartnode 4 FXS VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4526/4JS2JO/EUI Smartnode 4 FXS 2 FXO VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4526/JS/EUI Smartnode 6 FXS VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4528/4JS4JO/EUI Smartnode 4 FXS & 4 FXO VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.
SN4528/JS/EUI Smartnode 8 FXS VoIP GW-Router; 2x10/100baseT, H.323 and SIP, External UI Power.

Data Sheet SmartNode 4520 Datasheet
User Manual SmartNode 4520 & 4110 Guide, Getting Started
Manuals Vita IP Network Access Catalog Vita IP Connectivity Catalog


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