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Analog VoIP Gateway

Analog VoIP Gateway


The analog VoIP gateway is a gateway with 8 FXS ports per board and a gateway supporting up to 112 FXS ports.The analog voip gateway is suitable for large-scale communication systems, such as enterprise groups, subways, and other industrial areas.
analog voip gateway

Analog VoIP Gateway KNPB-112

Analog voip gateway provides superior voice technology by connecting traditional telephone (POTS), fax machines and PBX systems over an IP-based telephone network. The modular design of the DAG3000 Series allows for flexible configuration of FXS / FXO line capacity. It offers the maximum capacity of 112 FXS lines and FXO lines for call center, industrial and enterprise VoIP deployments.
Analog VoIP Gateway Overview
KNPB-112 is a multi-functional analog gateway offering seamless connectivity between IP-based telephony networks and legacy telephones (POTS), fax machines and PBX systems. It adopts modularized hardware design that allows to expand FXS ports by adding boards according to user’s requirements. Each board has 8 FXS ports and the gateway supports 112 FXS ports at maximum. KNPB-112 supports the standard SIP protocol and it's compatible with leading IMS/NGN platforms and SIP-based IP telephony systems. It is ideally suited for small and medium businesses, call centers and multi-location environments that need VoIP services.

Key  Features
* High density gateway, up to 112 FXS
* Modularized design, easy to expand
* Support IPv4 and IPv6
* 5KM Maximum Cabling Length
* Elastix/Broadsoft Certification
* Multiple codecs: G.711A/U,G.723.1,G.729A/B, iLBC,AMR
* Fully compatible with leading IMS/NGN, SIP based IP telephony system

==>>>> Product Specification

Physical Interfaces

 • Capacityconcurrent 

   Range from 8 to 112 FXS

 • SIU Board 

   2* RJ45 connector with 8 FXS

   Support 14 SIU Boards

  MPU Board  

   1*RS232, 115200bps

   4*10/100M BaseT Auto MDIX, RJ45

   Support 2 MPU Slots



• Connector: RJ45 with 4 FXS

• Dial Mode: DTMF and Pulse

• Pulse: 10 and 20 PPS

• Caller ID: DTMF/FSK CLI Presentation

• Max Cable Length: 5KM

• Reversed Polarity

• Programmable Call Progress Tone



Voice & FAX

• G.711A/U law, G.723.1,


• Silence Suppression

• Comfort Noise Generation(CNG)

• Voice Activity Detection(VAD)

• Echo Cancellation(G.168), with up to 128ms

• Adaptive (Dynamic) Jitter Buffer

• Hook Flash

• Programmable Gain Control

• T.38/Pass-through 

• Modem/POS

• DTMF mode:


• VLAN 802.1P/802.1Q

• Layer3 QoS and DiffServ



• Protocol: SIP v2.0 (UDP/TCP),RFC3261

  SDP,RTP(RFC2833), RFC3262,


• RTP/RTCP, RFC2198, 1889

• RFC4028 Session Timer

• RFC3266 IPv6 in SDP


• RFC3581 NAT,rport

• Primary/Backup SIP Server

• Outbound Proxy

• DNS SRV/ A Query/NATPR Query 

• SIP Trunk

• Early Media/Early Answer

• NAT:STUN, Static/Dynamic NAT


Supplementary Service

• Call Waiting

• Blind Transfer

• Attend Transfer

• Call Forward on Busy

• Call Forward on No Reply

• Unconditional Call Forward

• Warm/Immediately Hotline

• Call Hold

• Do-not-disturb

• 3-Way Conference

• Message Waiting Indicator



• SNMP v1/v2/v3/span>

• TR069

• Auto Provisioning

• Web/Telnet

• Configuration Backup/Restore

• Firmware Upgrade via Web


• Syslog

• Ping/Tracert Test

• Network Capture

• Outward Test(GR909)

• NTP/Daylight Saving Time

• IVR local Maintenance

• Cloud-based Management


Software Features

• Hunting Group

• Web ACL

• Telnet ACL

• Action URL

• PPPoE/IPv4/IPv6

• Digitmap

• Bandwidth Optimization

• Routing Rules based Prefixes

• Caller/Called Number Manipulation



• Power Supply: 100-240VAC, 50-60 Hz

• Power Consumption:124W MAX

• Operating Temperature:0 ℃ ~ 45 ℃

   Storage Temperature: -20 ℃ ~80 ℃

• Humidity:10%-90% Non-Condensing

• Dimensions(W/D/H): 440*320*135mm(3U)

• Unit Weight: 7.0kg

• Compliance: CE, FCC


==>>>>Telephone System
analog voip gateway application system

==>>>>Product Application
analog voip gateway application system

==>>>>Product Detailed Pictures
analog voip gateway
analog voip gateway front view
analog voip gateway side view

==>>>>Product Video

==>>>>Please Email US marketing@koontech.com

This product model:KNPB-112