Cisco SPA112 2 Port VoIP Telephone Adapter/ SIP ATA with 2-FXS/ VOIP Ports


High-quality Voice and Fax over the Internet

The Cisco SPA112 two-port phone adapter allows you to use analog phones and fax machines over the Internet, so you can enjoy the benefits of high quality voice over IP (VoIP) without the need to upgrade your existing analog phones, conference speakerphones, or fax machines. The SPA112 includes two standard telephone ports, and each can be configured independently. It won’t compromise voice quality, and maintains common telephones features such as caller ID, call waiting, and voicemail. Plus, the Cisco SPA112 is compact, easy to install and use, offering a great VoIP solution for use with residential, home-office, and small-business-VoIP service offerings, including full-featured hosted or open source IP PBX environments.

Toll-Quality Voice and Carrier-Class Feature Support
The Cisco SPA112 delivers clear, high-quality voice communication under a variety of network conditions. Excellent voice quality in challenging, changeable IP network environments is made possible through the advanced implementation of standard voice coding algorithms. The Cisco SPA112 is interoperable with common telephony equipment such as fax, voicemail, private branch exchanges (PBXs) and key telephone systems (KTSs), and interactive voice response systems.

Large-Scale Deployment and Management
The Cisco SPA112 enables service providers to provide customized services to their subscribers. It can be remotely provisioned and supports dynamic, in-service software upgrades. A highly secure profile upload saves providers the time and expense of managing and preconfiguring or reconfiguring customer premises equipment (CPE) for deployment.

Outstanding Security
The Cisco SPA112 supports highly secure, encryption-based methods for communication, provisioning, and servicing.

Comprehensive Feature Set
The standards-based Cisco SPA112 is compatible with Internet VoIP provider features such as caller ID, call waiting, voicemail, call forwarding, distinctive ring, and much more to provide a complete, affordable, and highly reliable solution for high-quality VoIP.

Compact Size
Designed for small spaces, the Cisco SPA112 can be installed as a desktop unit or mounted on a wall.

Easy Installation and Changes
The web-based configuration utility enables quick deployment and easy changes.

Cisco SPA112 Package Contents

  • Cisco SPA112 Analog Telephone Adapter.
  • Ethernet Cable.
  • Power Adapter.
  • Quick Start Guide.
  • Product CD-ROM.

Please note: You will require an RJ11 to BT Plug adapter to connect an analogue phone/fax to the Cisco SPA112.

SKU: Cisco SPA 112 Category: Tags: , ,
Weight 0.2 kg


Data networking

  • MAC address (IEEE 802.3)
  • IPv4 (RFC 791) upgradeable to IPv6 (RFC 1883)
  • Address Resolution Protocol (ARP)
  • Domain Name System (DNS) A record (RFC 1706) and SRV record (RFC 2782)
  • Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
  • Point-to-Point Protocol over Ethernet (PPoE) client (RFC 2516)
  • Internet Control Message Protocol (ICMP) (RFC 792)
  • TCP (RFC 793)
  • User Datagram Protocol (UDP) (RFC 768)
  • Real Time Protocol (RTP) (RFC 1889) (RFC 1890)
  • Real Time Control Protocol (RTCP) (RFC 1889)
  • VLAN tagging (IEEE 802.1p)
  • Simple Network Time Protocol (SNTP) (RFC 2030)
  • SIP channels support for both UDP and TCP transport

Voice gateway

  • SIPv2 (RFC 3261, 3262, 3263, and 3264)
  • SIP proxy redundancy: Dynamic through use of DNS SRV A records
  • Reregistration with primary SIP proxy server
  • SIP support in network address translation (NAT) networks (including Serial Tunnel [STUN])
  • Highly secure (encrypted) calling using Secure RTP (SRTP)
  • Codec name assignment
  • G.711 (A-law and ¥ì-law)
  • G.726 (32 kbps)
  • G.729 A
  • Dynamic payload
  • Adjustable audio frames per packet
  • Dual-tone multifrequency (DTMF): In-band and out-of-band (RFC 2833) (SIP information)

Voice features

  • Independent configurable dial plans with interdigit timers and IP dialing (1 per port)
  • Call progress tone generation
  • Jitter buffer: Adaptive
  • Frame loss concealment
  • Full-duplex audio
  • Echo cancellation (G.165 and G.168)
  • Voice activity detection (VAD)
  • Silence suppression
  • Comfort noise generation (CNG)
  • Attenuation and gain adjustments
  • Flash hook timer
  • Message waiting indicator (MWI) tones
  • Visual messaging waiting indicator (VMWI) using frequency shift keying (FSK)
  • Polarity control
  • Hook flash event signaling
  • Caller ID generation (name and number): Bellcore, DTMF, and European Telecommunications Standards Institute
  • ETSI)
  • Streaming audio server: Up to 10 sessions
  • Music on hold
  • Call waiting, call waiting and caller ID
  • Caller ID with name and number
  • Caller ID blocking
  • Selective and anonymous call rejection
  • Call forwarding: No answer, busy, and all
  • Do not disturb
  • Call transfer, call return, and call back on busy
  • Three-way conference calling with local mixing
  • Per-call authentication and associated routing
  • Call blocking with toll restriction
  • Distinctive ringing: Calling and called number
  • Off-hook warning tone
  • Advanced inbound and outbound call routing
  • Hotline and warmline calling
  • Long silence (configurable time setting) silence threshold
  • Disconnect tone (for example, reorder tone)
  • Configurable ring frequency
  • Ring validation time setting
  • Tip and ring voltage adjustment setting
  • Ring indication delay setting

Fax capability

  • Fax tone detection pass-through
  • Fax pass-through using G.711
  • Real-time fax over IP using T.38 fax relay (T.38 support is dependent on fax machine and network and transport resilience)


  • Password-protected system reset to factory default
  • Password-protected administrator and user access authority
  • Provisioning, configuration, and authentication
  • HTTPS with factory-installed client certificate
  • HTTP digest: Encrypted authentication using MD5 (RFC 1321)
  • Up to 256-bit Advanced Encryption Standard (AES) encryption
  • SIP Transport Layer Security (TLS)

Provisioning, administration, and maintenance

  • Web browser administration and configuration using integral web server
  • Telephone keypad configuration with interactive voice prompts
  • Automated provisioning and upgrade using HTTPS, HTTP, and Trivial File Transfer Protocol (TFTP)
  • TR-069
  • Asynchronous notification of upgrade availability using Notify
  • Nonintrusive, in-service upgrades
  • Report generation and event logging
  • Statistics in Bye message
  • Debug server records and syslog: Per-line configurable web browser
  • Ping and traceroute diagnostics
  • Configuration management: Backup and restore
  • Support for Bonjour

Physical interfaces

  • 1 WAN 100BASE-T RJ-45 Ethernet Port (IEEE 802.3)
  • 2 RJ-11 FXS phone ports for analog circuit telephone device (tip and ring)
  • Reset button

Subscriber line interface circuit (SLIC)

  • Ring voltage: 40-90 Vpk configurable
  • Ring frequency: 20-25 Hz
  • Ring waveform: trapezoidal
  • Maximum ringer load: 5 ringer equivalence numbers (RENs)
  • On-hook voltage (tip and ring): -46 to -56V
  • Off-hook current: 18-25 mA
  • Terminating impedance: 600 ohm resistive or 270 ohm + 750 ohm
  • 150 nF complex impedance
  • Frequency response: 300-3400 Hz
  • Return loss (600 ohm, 300-3400 Hz): up to 20 dB
  • Insertion loss (1 Vrms at 1 kHz): 3-4 dB
  • Total harmonic distortion (THD) (350 mV peak at 300 Hz): up to 3%
  • Idle channel noise: 72 dB (typical)
  • Longitudinal balance: 55 dB (typical)
  • Off-hook threshold (line seizure): Rdc < 1000 ohm
  • On-hook threshold (line release): Rdc >10000 ohm
  • Rdc DC supervisory range: Rdc > 450 ohm

Regulatory compliance

  • FCC (Part 15 Class B), CE, ICES-003, A-Tick certification, Restriction of Hazardous Substances (RoHS), and UL
  • Power supply

DC input voltage: 5V DC at 2.0A maximum

  • Power consumption: 5W
  • Switching type (100-240V) automatic
  • Power adapter: 100-240V and 50-60 Hz (26-34 VA) AC input, with 1.8m cord

Indicator lights and LEDs

  • Phone 1, phone 2, Internet, and power


  • Quick Start Guide
  • Administration Guide (available online)
  • Provisioning Guide (available online)


  • Dimensions (W x H x D)
    • 3.98 x 3.98 x 1.10 in. (101 x 101 x 28 mm)
  • Unit weight
    • 5.40 oz (153 g)
  • Operating temperature
    • 32 to 113¨¬F (0 to 45¨¬C)
  • Storage temperature
    • -77 to 158¨¬F (-25 to 70¨¬C)
  • Operating humidity
    • 10 to 90% noncondensing
  • Storage humidity
    • 10 to 90% noncondensing

Package Contents

  • Cisco SPA112 2 Port Phone Adapter
  • 5V/2A power adapter
  • 6-ft (1.83m) Ethernet cable
  • Quick Start Guide
  • CD with documentation, including license and warranty

Product Warranty

  • 1-year limited hardware warranty with return-to-factory replacement and 90-day limited software warranty

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