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Cisco SPA-2102 Phone Adapter with Router - SPA2102-NA

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5 out of 5
Total Reviews
Overall Satisfaction
Ease of Use

Works great, but try not to be overwhelmed

by celilo on 3/23/2009

This is a great product, and performs exactly as expected. Sound quality is excellent. I've even had people tell me on the phone that the sound quality was amazing. Be aware that this is a complex device with a potentially overwhelming amount of details for a less technical user that is simply trying to connect to a voip service. The good news is that most voip providers can tell you exactly how to setup your device for their service, so ignore the techno docs and follow a few easy steps from your providers help page to get going quickly. One tip for those that are installing this device behind an existing router rather than using the devices built in router. The easiest way to get going is to connect an ethernet cable to the lan interface from your computer (restart your network interface on your can just reboot), and log into in your web browser, which is the spa-2102 web interface. Enter an unused static ip on your routers subnet. Set "Enable WAN Web Server" to yes, and submit changes. Move the ethernet cable to the wan port and connect the other end to your existing router. Reconnect your computer the router, and restart your network interface. You can now access your spa-2102 at the ip address that you entered for the wan interface.

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Great for VoIP do-it-yourself!

by Earl J. on 8/5/2011

The SPA-2102 is an adapter that lets you use your analog (traditional) phones with a VoIP service and your existing broadband Internet connection. Some technical knowledge is required to set this up (or assistance from your VoIP provider) but once you get it installed, it is rock-solid. It is inexpensive enough that if you're not sure if VoIP is for you, you can still justify buying one of these to give it a try. I use this with as my provider and I have already paid for this adapter/router many times over in savings on my phone bill

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Product Overview

Inexpensive, easy to install, and simple to use, the Cisco SPA2102 Phone Adapter with Router connects a standard telephone or fax machine to an IP-based data network. Voice over IP (VoIP) service providers can offer residential and business users traditional and enhanced communication services via the customer's broadband connection to the Internet.

The Cisco SPA2102 features two basic telephone ports to connect existing analog phones or fax machines to a private branch exchange (PBX) system. It also includes two 100BASE-T RJ-45 Ethernet interfaces to connect to a home or office LAN, as well as an Ethernet connection to connect a broadband modem or router (WAN). Each phone line can be configured independently via software controlled by the service provider or the end user. With the SPA2102, users are able to protect and extend their investment in their existing analog telephones, conference speakerphones, and fax machines, as well as control their migration to IP with an extremely affordable, reliable solution.

Installed by the end user and remotely provisioned, configured, and maintained by the service provider, each Cisco SPA2102 converts voice traffic into data packets for transmission over an IP network. Compact in design, the SPA2102 can be used in consumer and business VoIP service offerings, including full-featured IP Centrex environments. The SPA2102 uses international standards for voice and data networking for reliable operation.


Manufacturer Cisco Small Business
Mfg Part# SPA2102-NA
SKU 202672436
UPC 745883569472
UPC 14 00745883569472
Product Guide Click Here for the Cisco Small Business Store
Toll-quality voice and carrier-grade feature support: The Cisco SPA2102 delivers clear, high-quality voice communication under a variety of network conditions. Excellent voice quality in challenging, changeable IP network environments is made possible via the advanced implementation of standard voice coding algorithms. The SPA2102 is interoperable with common telephony equipment such as fax, voicemail, PBX/KTS, and interactive voice response systems.
Large-scale deployment and management: The Cisco SPA2102 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.
Ironclad security: The Cisco SPA2102 supports highly secure, encryption-based methods for communication, provisioning, and servicing.
Tech Specs
Data networking:
MAC address (IEEE 802.3)
IPv4 (RFC 791)
Address Resolution Protocol (ARP)
DNS-A record (RFC 1706), SRV record (RFC 2782)
Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
DHCP server (RFC 2131)
Internet Control Message Protocol (ICMP) (RFC 792)
TCP (RFC 793)
User Datagram Protocol (UDP) (RFC 768)
Real Time Protocol (RTP) (RFC 1889, 1890)
Real Time Control Protocol (RTCP) (RFC 1889)
Differentiated Services (DiffServ) (RFC 2475), type of service (ToS) (RFC 791, 1349)
Simple Network Time Protocol (SNTP) (RFC 2030)
Upload data rate limiting: static and automatic
Quality of service (QoS): voice packet prioritization over other packet types
Router or bridge mode of operation
MAC address cloning
Port forwarding
Voice gateway:
Session Initiation Protocol (SIP) v2 (RFC 3261, 3262, 3263, 3264)
SIP proxy redundancy-dynamic via 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 via prestandard implementation of Secure RTP
Voice algorithms:
Codec name assignment
G.711 (A-law and µ-law)
G.726 (16/24/32/40 kbps)
G.729 A
G.723.1 (6.3 kbps, 5.3 kbps)
Dynamic payload
Adjustable audio frames per packet
Voice specifications:
Dual-tone multifrequency (DTMF): in-band and out-of-band (RFC 2833) (SIP info)
Flexible dial plan support with interdigit timers and IP dialing
Call progress tone generation
Jitter buffer-adaptive
Frame loss concealment
Full duplex audio
Echo cancellation (G.165/G.168)
Voice activity detection (VAD) with silence suppression
Attenuation/gain adjustments
Flash hook timer
Message waiting indicator (MWI) tones
Visual message waiting indicator (VMWI) via frequency shift keying (FSK)
Polarity control
Hook flash event signaling
Caller ID generation (name and number)-Bellcore, DTMF, European Telecommunications Standards Institute (ETSI)
Music on hold client
Streaming audio server-up to 10 sessions
Fax capability:
Fax tone detection pass-through
Fax: G.711 pass-through or real-time fax over IP via T.38 (T.38 support is dependent on fax machine and network/transport resilience.)
Password-protected system reset to factory default
Password-protected administrator and user access authority
HTTPS with factory-installed client certificate
HTTP digest-encrypted authentication via MD5 (RFC 1321)
Up to 256-bit Advanced Encryption Standard (AES) encryption
Provisioning, administration, and maintenance:
Web browser administration and configuration via integral web server
Telephone keypad configuration with interactive voice prompts
Automated provisioning and upgrade via HTTPS, HTTP, Trivial File Transfer Protocol (TFTP)
Asynchronous notification of upgrade availability via NOTIFY
Nonintrusive, in-service upgrades
Report generation and event logging
Stats in BYE message
Syslog and debug server records-per-line configurable
Per-line and purpose configurable syslog and debug options
Physical interfaces:
Two 100BASE-T RJ-45 Ethernet ports (IEEE 802.3)
2 RJ-11 FXS phone ports-for analog circuit telephone device (tip/ring)
Subscriber line interface circuit (SLIC):
Ring waveform: trapezoidal and sinusoidal
Maximum ringer load: 3 ringer equivalence numbers (RENs)
On-hook/off-hook characteristics:
On-hook voltage (tip/ring): -50V nominal
Off-hook current: 25 mA min
Terminating impedance: 8 configurable settings including North America 600 ohms, European CTR21
Regulatory compliance:
FCC (Part 15, Class B) , CE, ICES-003
Power supply:
Switching type (100-240V) automatic
DC input voltage: +5V DC at 2.0A maximum
Power consumption: 5W
Power adapter: 100-240V, 50-60 Hz (26-34VA) AC input, 1.8-m cord
Indicator lights/LED:
Power, Internet, Phone 1, Phone 2
Quick-start installation guide
Administration guide-service providers only
Provisioning guide-service providers only
Product Warranty: 1-year limited hardware warranty with return to factory replacement and 90-day limited software warranty
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Great for VoIP do-it-yourself! by Earl J. on Aug 05, 2011

Works great, but try not to be overwhelmed by celilo on Mar 23, 2009