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Grandstream HT881 Analog FXO Gateways

Grandstream HT881 Analog FXO Gateways

The Grandstream HT881 Analog FXO Gateway is a high-density hybrid VoIP gateway designed to connect multiple analogue PSTN (telephone company) lines to SIP-based IP PBX systems. It provides a scalable solution for businesses that need to integrate traditional analogue telephone circuits into…

£200.00

The Grandstream HT881 Analog FXO Gateway is a high-density hybrid VoIP gateway designed to connect multiple analogue PSTN (telephone company) lines to SIP-based IP PBX systems. It provides a scalable solution for businesses that need to integrate traditional analogue telephone circuits into modern VoIP communication networks while maintaining reliability, flexibility, and centralised control.

Featuring 8 FXO ports and 1 FXS port, the HT881 enables organisations to bring multiple external PSTN lines into a VoIP system and also support a single analogue telephone or fax device locally. It is widely used in business environments requiring multi-line PSTN integration, such as offices, call routing systems, hospitality, and branch deployments.

Ideal For

  • Medium to large businesses
  • Branch office deployments
  • Call centres and reception systems
  • PSTN to VoIP migration projects
  • Multi-line analogue trunk integration
  • Hybrid PBX environments
  • Hospitality and service industries

Benefits

The HT881 allows organisations to connect up to eight analogue telephone lines into a VoIP system, reducing dependency on legacy PBX hardware while enabling SIP-based call routing and unified communications.

Its built-in NAT routing and failover capabilities help maintain communication continuity even in the event of network or SIP server issues, making it suitable for business-critical deployments.

  • 8 FXO ports for PSTN analogue line connectivity
  • 1 FXS port for analogue phone or fax
  • Supports up to 3 SIP profiles
  • Integrated high-performance Gigabit NAT router
  • Lifeline support (FXS port failover to FXO during power loss)
  • T.38 Fax-over-IP support
  • 3-way voice conferencing per port
  • Failover SIP server support
  • TLS and SRTP security encryption
  • Automated provisioning (TR-069, XML, HTTP, TFTP)
  • Broad SIP interoperability
  • GDMS cloud management support
  • Carrier-grade echo cancellation and voice processing

Telephony Features

  • 8 × RJ11 FXO ports (PSTN line input)
  • 1 × RJ11 FXS port
  • Supports up to 3 SIP server profiles
  • Caller ID support
  • Call hold, transfer, forwarding, waiting
  • Do Not Disturb (DND)
  • 3-way conferencing
  • Flexible dial plan support
  • T.38 fax relay up to 14.4kbps

Network Interfaces

  • 2 × 10/100/1000Mbps Gigabit Ethernet ports
  • Integrated NAT router
  • DHCP client/server support
  • QoS support

Audio Features

  • G.711, G.723.1, G.726, G.729A/B, iLBC, Opus codec support
  • Dynamic jitter buffer
  • Advanced line echo cancellation
  • Silence suppression

Security

  • TLS and SRTP encryption
  • HTTPS secure management
  • AES encryption with device-level certificate
  • Secure provisioning support

Management

  • TR-069 provisioning
  • XML configuration support
  • Web-based management interface
  • GDMS cloud device management
  • Remote monitoring and syslog support

Physical

  • Desktop / rack-adjacent form factor
  • LED indicators for power, network, FXS and FXO ports
  • Compact enterprise deployment design
  • Grandstream HT881 Analog FXO Gateway
  • Power Supply Unit (PSU)
  • Ethernet cable
  • Quick installation guide
  • Warranty documentation

Next Day Delivery
For UK orders received before 1pm Monday to Friday, we operate a next business day delivery service, subject to availability. We use next day services from the leading delivery companies.

Specific Time Delivery
If you need an item urgently, or delivered at a specific time, please contact us.

Delivery Methods
We use several leading delivery companies. The majority of our deliveries are made by DPD, including most international orders.

Shipping prices are calculated during the checkout process. We deliver to almost every country. For international delivery services, we use DHL, a high quality, fast delivery service. Prices are provided based on the weight of the order; this is calculated when you reach the checkout.

For full shipping information please visit our shipping page.

Overview

The Grandstream HT881 Analog FXO Gateway is a high-density hybrid VoIP gateway designed to connect multiple analogue PSTN (telephone company) lines to SIP-based IP PBX systems. It provides a scalable solution for businesses that need to integrate traditional analogue telephone circuits into modern VoIP communication networks while maintaining reliability, flexibility, and centralised control.

Featuring 8 FXO ports and 1 FXS port, the HT881 enables organisations to bring multiple external PSTN lines into a VoIP system and also support a single analogue telephone or fax device locally. It is widely used in business environments requiring multi-line PSTN integration, such as offices, call routing systems, hospitality, and branch deployments.

Ideal For

  • Medium to large businesses
  • Branch office deployments
  • Call centres and reception systems
  • PSTN to VoIP migration projects
  • Multi-line analogue trunk integration
  • Hybrid PBX environments
  • Hospitality and service industries

Benefits

The HT881 allows organisations to connect up to eight analogue telephone lines into a VoIP system, reducing dependency on legacy PBX hardware while enabling SIP-based call routing and unified communications.

Its built-in NAT routing and failover capabilities help maintain communication continuity even in the event of network or SIP server issues, making it suitable for business-critical deployments.

  • 8 FXO ports for PSTN analogue line connectivity
  • 1 FXS port for analogue phone or fax
  • Supports up to 3 SIP profiles
  • Integrated high-performance Gigabit NAT router
  • Lifeline support (FXS port failover to FXO during power loss)
  • T.38 Fax-over-IP support
  • 3-way voice conferencing per port
  • Failover SIP server support
  • TLS and SRTP security encryption
  • Automated provisioning (TR-069, XML, HTTP, TFTP)
  • Broad SIP interoperability
  • GDMS cloud management support
  • Carrier-grade echo cancellation and voice processing

Telephony Features

  • 8 × RJ11 FXO ports (PSTN line input)
  • 1 × RJ11 FXS port
  • Supports up to 3 SIP server profiles
  • Caller ID support
  • Call hold, transfer, forwarding, waiting
  • Do Not Disturb (DND)
  • 3-way conferencing
  • Flexible dial plan support
  • T.38 fax relay up to 14.4kbps

Network Interfaces

  • 2 × 10/100/1000Mbps Gigabit Ethernet ports
  • Integrated NAT router
  • DHCP client/server support
  • QoS support

Audio Features

  • G.711, G.723.1, G.726, G.729A/B, iLBC, Opus codec support
  • Dynamic jitter buffer
  • Advanced line echo cancellation
  • Silence suppression

Security

  • TLS and SRTP encryption
  • HTTPS secure management
  • AES encryption with device-level certificate
  • Secure provisioning support

Management

  • TR-069 provisioning
  • XML configuration support
  • Web-based management interface
  • GDMS cloud device management
  • Remote monitoring and syslog support

Physical

  • Desktop / rack-adjacent form factor
  • LED indicators for power, network, FXS and FXO ports
  • Compact enterprise deployment design