The SmartNode 4520 Series Gateway-Router supports up to 8 FXS or FXO telephone connections. It combines VoIP with advanced Quality of Service and full Internet access and security features to provide best-in-class service and voice quality.

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.

This integrated access router and VoIP Gateway benefits service providers and enterprise network administrators with a lower cost of ownership and better service quality.



Up to 8 analog ports
  - Compact, reliable stand-alone VoIP gateway with different port options. Supports simultaneous voice or fax calls on all ports. (note: Patton does not carry an 8-FXO unit at the present time)
Toll-Quality VoIP
  - Advanced traffic management and shaping, combined with Patton’s patent-pending DownStream QoS™ enforce uninterrupted toll-quality voice over best-effort networks.
Advanced Local Call Switching
  - Virtual interfaces and routing tables provide industry leading flexibility in call handling programming. Local call switching, soft fallback to alternative routes. Simultaneously connects to multiple SIP services/IP PBXs.
Complete SIP and T.38 support
  - Supports the complete range of industry standard VoIP: SIP, H.323, T.38 fax, fax and modem handling, DTMF relay. Codecs G.729, G.723, and so on.
Easy Management & Provisioning
  - Web-based management, SNMP, command line interface. Automated mass provisioning for efficient large-scale deployments.
Outstanding Interoperability
  - Proven integration for voice and T.38 fax with leading IP PBX systems and soft switch vendors.
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)
Fax and Modem Support
G.711 Fax- and Modem-Bypass
T.38 Fax relay (9.6 k, 14.4 k)
Voice Signalling
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
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
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: Up to 90% (non condensing)
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
Barcode # 847840000988
Shipping Weight 2.0000kg
Shipping Width 0.150m
Shipping Height 0.250m
Shipping Length 0.200m
Shipping Cubic 0.007500000m3
Manufacturer Warranty
1 Year Limited Warranty

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