Patton Electronics SN4741/16JS16VSP/RJ21/R48 - SmartNode VoIP Gateway, 16 FXS on RJ21-50pin, K.21 basic surge protection, 16 VoIP Calls, upgradeable to eSBC (max. 200 SIP calls), Optional SIP-TLS/SRTP, Optional Transcoding (max. 8 calls), 2x Gig Ethernet, 1x USB, 1x Console, Redundant 48V DC Power
Patton Electronics

SN4741/16JS16VSP/RJ21/R48

UPC: 847840014015

Documents & Media
Manufacturer Product WebsiteUser Manual

Contact for Pricing

Overview

The Patton SmartNode SN4741/16JS16VSP/RJ21/R48 VoIP Gateway is a high-density analog-to-SIP conversion solution designed for enterprise, hospitality, and industrial deployments. This 16-port FXS gateway supports up to 16 concurrent VoIP calls with hardware capable of scaling to 200 SIP sessions via an optional eSBC license (SNSW-1B). Built for reliability, it includes K.21 basic surge protection for operation in noisy or high-interference environments, making it ideal for factories, campuses, and remote offices. Key features include dual Gigabit Ethernet ports for LAN/WAN segmentation, a USB port for local storage or logging, and a console port for CLI management. The device is powered by redundant 48V DC inputs, ensuring continuous operation even during power fluctuations. Optional SIP-TLS/SRTP encryption secures voice traffic, while hardware-based transcoding supports up to 8 simultaneous calls with codec conversion (G.711, G.723, G.729ab, G.726, G.727). The SN4741 is part of Patton’s SN4740 series, which scales analog port densities from 16 to 128 ports across the lineup. It supports 2-wire loop-start connectivity via RJ21-50pin, with programmable AC impedance, feeding, ring voltage, and caller-ID (FSK/ITU V.23/Bell). Compatible with Patton’s SN4740 series, it integrates seamlessly with legacy analog phones, fax machines, and PBX systems, enabling migration to VoIP without replacing existing infrastructure. Typical applications include hotels, resorts, hospitals, and industrial facilities requiring robust analog-to-SIP conversion with future-proof flexibility. The gateway supports T.38 fax relay (9.6k/14.4k), DTMF in-band/out-of-band signaling, and call features like transfer, redirect, and programmable tones. With support for H.323v4 and SIPv2 (B2BUA capable), it ensures interoperability with leading SIP service providers, soft-switch vendors, and IP-PBX systems like Asterisk™. Ordering options include the base model (SN4741/16JS16VSP/RJ21/R48) and add-on licenses for eSBC (SNSW-1B), transcoding (SNSW-TC), and VPN (SNSW-VPN1). The device ships with 16 FXS ports, 48V DC power, and is manufactured in the US by Patton Electronics.
  • 16 FXS ports via RJ21-50pin for analog phone/fax/PBX connectivity
  • Supports up to 16 concurrent VoIP calls; scalable to 200 SIP sessions with eSBC license (SNSW-1B)
  • Dual Gigabit Ethernet ports for LAN/WAN segmentation and redundant 48V DC power input
  • Hardware-based transcoding for up to 8 simultaneous calls (G.711, G.723, G.729ab, etc.)
  • K.21 surge protection, SIP-TLS/SRTP encryption, T.38 fax relay, and CLI management via console port

Specifications

Connection Type
RJ21-50pin
Series
SmartNode SN4741
Series
SN4741
Voltage Rating
48 V DC
Package Weight (Imperial)
5.85 lbs
SmartNode Industrial VoIP Gateway, 2 FXS, 2 FXO, 4 VoIP Calls, eSBC upgradeable (SIP b2b UA max. 200 SIP calls), Optional SIP-TLS/SRTP; Transcoding (max. 4 calls), 2x Gig Ethernet, Power - Internal +12 to +48 VDC

SN4141E/2ETH2JS2JO4V/DC

SmartNode Industrial VoIP Gateway, 2 FXS, 2 FXO, 4 VoIP Calls, eSBC upgradeable (SIP b2b UA max. 200 SIP calls), Optional SIP-TLS/SRTP; Transcoding (max. 4 calls), 2x Gig Ethernet, Power - Internal +12 to +48 VDC

Frequently Asked Questions about Patton Electronics

What is Patton Electronics's warranty policy?

Patton Electronics offers a comprehensive 30-day money-back guarantee on all standard products. This allows customers to purchase with complete confidence, and if unsatisfied, return the product within 30 days. Additionally, Patton provides free top-notch technical support and offers extended warranty options for customers seeking additional protection.

What industries and applications are Patton Electronics products used for?

Patton Electronics products serve multiple critical industries including telecommunications, enterprise networking, industrial automation, banking, point-of-sale, and machine-to-machine communications. Their product lines like SmartNode VoIP, IPLink Routers, and Remote Access Servers enable connectivity solutions for ISP internet access, corporate VPN networks, remote industrial communications, secure banking transactions, and diverse network environments.

What technical support does Patton Electronics offer?

Patton Electronics offers comprehensive technical support through multiple channels, including free top-notch phone and online support directly from factory personnel. Customers receive immediate assistance via phone (+1.301.975.1007 in USA, +41.31.985.25.55 in Switzerland) or email ([email protected]). Their technical support includes free technical advice, installation assistance, advanced service level agreements (SLAs), extended warranty options, advance replacements, and on-site training services.

What are the main product lines offered by Patton Electronics?

Patton Electronics offers a comprehensive range of networking and communication products across multiple product lines, including VoIP Telephony, IP WAN Routers, DSL Products, Remote Access Servers, Serial Device Servers, Industrial Computers, Interface Converters, and Network Connectivity Solutions. Their key product categories span telecommunications infrastructure, network access technologies, and industrial communication equipment, with a strong focus on integrated voice/data routers, broadband connectivity, and network access solutions.

What are the key features of Patton Electronics products?

Patton Electronics offers a comprehensive range of industrial networking and communication products with key features including VoIP telephony, network access solutions, device servers, and Ethernet extension technologies. Their product lines feature robust software, industry-standard protocols (H.323, SIP, MGCP), and versatile interface options for voice and data networks. Standout capabilities include low-cost broadband routers, remote access servers with legacy modem compatibility, and Ethernet extenders that can operate over standard twisted pair cables with ranges up to 5 miles.

What communication protocols do Patton Electronics products support?

Patton Electronics products support multiple communication protocols across serial and Ethernet networks, including RS-232, RS-422, RS-485, Ethernet 10/100BaseTX, 802.11b WiFi, Bluetooth, IPv4, TCP/UDP, Telnet, DHCP, and NAT. Their device servers and networking solutions enable seamless communication between serial devices and Ethernet networks, with support for various data formats, parity options, and transmission speeds.

What environmental ratings do Patton Electronics products have?

Patton Electronics offers three primary environmental ratings through their EnviroNET product lines: EH Series (NEMA 4, 32-122°F), EC Series (32-185°F with environmental protection), and ET Series (Extended Temperature, -40 to 185°F with robust environmental resistance). These series protect against dust, rain, snow, moisture, and physical tampering, making them suitable for harsh industrial environments.

What accessories are available for Patton Electronics products?

Patton Electronics offers a wide range of accessories including power supplies, interface converters, surge protectors, baluns, line drivers, fiber modems, serial device servers, Ethernet extenders, and rack mounting solutions. Key accessories include universal AC/DC power supplies, rack chassis, interface cards, and connectivity adapters for various network and communication applications.

What certifications and standards do Patton Electronics products comply with?

Patton Electronics products are certified to ISO 9001 quality management standards and comply with key international certifications including UL (Underwriters Laboratories) for the USA and Canada. The company maintains a rigorous quality assurance system at their Gaithersburg, Maryland facility, ensuring their industrial networking, communications, and automation products meet high standards of performance and reliability.

How are Patton Electronics products typically installed?

Patton Electronics offers comprehensive installation support through their Global Solutions Group, which provides system engineering, installation, operations, and maintenance services for voice, data, and integrated networks. Their technical support team can assist with installation, and they offer extensive online resources including user manuals and technical notes at www.patton.com to facilitate product setup. For complex installations, Patton leverages a network of local personnel and integration contractors worldwide to ensure professional implementation.