Cisco Small Business Voice Gateways and ATAs

Cisco SPA232D Multi-Line DECT ATA Data Sheet

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Product Overview

The Cisco ® SPA232D Multi-Line DECT ATA is a mobility enhanced, affordable, highly reliable voice gateway for connecting an analog phone or fax machine to a voice-over-IP (VoIP) service provider. It can also intelligently route calls to the public switched telephone network (PSTN).
The revolutionary advances in the Cisco SPA232D include an integrated DECT base station used exclusively with the Cisco SPA302D Multi-Line DECT Handset, providing a mobility solution for users who tend to frequently move about their location but must always be reachable around the premises. The SPA232D supports essential voice features such as caller ID, call transfer, call waiting, call forwarding, voicemail, and much more to provide a comprehensive, advanced, and highly innovative VoIP solution.
The SPA232D provides one RJ-11 FXS port to connect a standard analog phone or fax machine and one FXO port to connect to the PSTN. The SPA232D FXS and FXO lines can be independently configured through software by the service provider or the end user. Users can take full advantage of their broadband phone service by enabling intelligent "hop-on, hop-off" applications to route local calls from mobile phones and land lines over to their VoIP service provider, and conversely.
The Cisco SPA232D also includes two 100BASE-T RJ-45 Ethernet interfaces to connect to a home or business LAN, and an Ethernet port to connect to a broadband access device. It uses international standards for voice and data networking for reliable voice and fax operation, and it can be used in residential, small office or home office (SOHO), and business environments including full-featured hosted service providers using Broadsoft, MetaSwitch or open source IP-PBX solutions such as Asterisk.

Features and Benefits

The Cisco SPA232D Multi-Line DECT ATA (Figures 1 and 2) offers the following:

• High-quality feature-rich VoIP service through your broadband Internet connection

• One standard telephone port for use with analog phones or fax machines and one port for PSTN connectivity to route local calls from mobile phones and land lines over to VoIP service providers and conversely

• Cost-effective, multi line on-premises mobility with its integrated DECT base station designed exclusively for Cisco SPA302D Multi-Line DECT Handsets and capable of registering up to five handsets to a SPA232D ATA supporting four simultaneous active calls

• Highly configurable and secure remote provisioning capabilities to enable mass-scale service provider activation and deployment

• Ideal solution for residential, SOHO, and business environments

Figure 1. Cisco SPA232D Multi-Line DECT ATA

Description: HKL45989

Figure 2. Ports on Cisco SPA232D

Description: HKL45091
Table 1 lists additional features and benefits of the Cisco SPA232D Multi-Line DECT ATA.

Table 1. Features and Benefits of Cisco SPA232D Multi-Line DECT ATA



Toll-quality voice and carrier-grade feature support

The SPA232D delivers clear, high-quality voice communication in diverse network conditions. Excellent voice quality in a demanding IP network is consistently achieved through our advanced implementation of standard voice-coding algorithms. The SPA232D is interoperable with common telephony equipment such as voicemail, fax, PBX, interactive-voice-response (IVR) systems, and many third-party call-control systems such as Broadsoft and Asterisk.

Large-scale deployment and management

The SPA232D offers all the important features and capabilities with which service providers can provide customized VoIP services to their subscribers. It can be remotely provisioned, and it is software-upgradable. A secure profile upload saves providers the time, expense, and hassle of managing and preconfiguring or reconfiguring subscriber equipment for deployment.

Outstanding security

The Cisco SPA232D supports highly secure, encryption-based methods for communication, provisioning, and servicing.

Comprehensive feature set

The standards-based Cisco SPA232D is compatible with essential Internet VoIP provider features such as caller ID, call waiting, call transfer, call forwarding, three-way conferencing, voicemail, and much more to provide a complete, affordable, and highly reliable VoIP solution.

Enhanced mobility

An integrated DECT base station with exclusive support for Cisco SPA302D Multi-Line DECT Handsets provides a simple and reliable mobility solution for users who tend to frequently move about their location but must be always reachable around the premises.

Easy installation and changes

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

Peace of mind

Cisco solutions deliver the solid reliability you expect from Cisco. All solution components have been rigorously tested to help ensure easy setup, interoperability, and performance.

Product Specifications

Table 2 gives the specifications of the Cisco SPA302D Multi-Line DECT Handsets.

Table 2. Product Specifications



Voice gateway

Session Initiation Protocol (SIP) v2 (RFCs 3261, 3262, 3263, and 3264)

SIP proxy redundancy: Dynamic through Domain Name System (DNS) SRV record

Reregistration with primary SIP proxy server

SIP support in Network Address Translation (NAT) networks (including Serial Tunneling [STUN])

Highly secure (encrypted) calling with Secure Real-Time Transport Protocol (SRTP)

Codec name assignment


G.711 (a-law and μ-law)

G.726 (32 kbps)

G.729 (b and ab)

Dynamic payload

Adjustable audio frames per packet

Dual-tone multifrequency (DTMF): In-band and out-of-band (RFC 2833) (SIP INFO)


1910 to 1930 MHz (SPA232D-G1)

1880 to 1920 MHz (SPA232D-G7)

Range: Indoor, 165 ft (50m); outdoor, 980 ft (300m)

Five handset registrations on a SPA232D

Four simultaneous active calls

11 individual SIP accounts (10 DECT and 1 FXS)

Page/Registration button

DECT cordless handset* (SPA302D)

* Please refer to the Cisco SPA302D Multi-Line DECT Handset data sheet for additional technical details.

1.8-in. TFT (128 x 160 pixels), 65,000 colors, backlit with scratch-resistant lens

Software upgradable over the air (SUOTA)

White illuminated keypad backlight

Administrative personal identification number (PIN) code support

Dial keypad lock

Speed dial: Eight programmable

Private and shared phone books (50 records)

Call history (50 records filtered by Outgoing, Incoming, and Missed)

Visual Message-Waiting Indicator (VMWI)

Five ringtones

Call mute

Call hold/resume

New call (support for two active call segments)


Call park and unpark

Intercom (handset-to-handset)

Hearing Aid Compatibility (HAC)

* Some features may require support by the call-control server.

Voice features

Quality of service (QoS) (Ethernet port upstream bandwidth control)

Independent configurable dial plans with interdigit timers and IP dialing (per line)

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

MWI tones

VMWI through frequency shift keying (FSK)

Polarity control

Hook flash event signaling

Caller ID generation (name and number): Bellcore, DTMF, and ETSI

Music-on-hold (MOH) client

Streaming audio server: Up to 10 sessions


Call waiting and call waiting 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

Hot line and warm line 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 through T.38 Fax Relay (T.38 support is dependent on fax machine and network and transport resilience.)

Enhanced gateway authentication and routing features

VoIP-to-PSTN (United States) service call origination and termination

PSTN-to-VoIP (United States) service call origination and termination

Single- and two-stage dialing

Forward calls to VoIP service: Selective, Authenticated, and All

Forward calls to PSTN service: Selective, Authenticated, and All

PSTN line sharing with multiple extensions

Automatic PSTN fallback (loss of power or IP service to unit, with quiescence to normal operations)

Advanced inbound and outbound call routing

Independent configurable dial plans: Up to 8

Force PSTN disconnection

Sequential dialing support


• VoIP-to-PSTN gateway enable and disable
• VoIP caller authentication method (None, PIN, and HTTP digest)
• VoIP PIN maximum retry setting
• One-stage dialing enable and disable
• VoIP caller ID pattern matching
• VoIP access-allowed caller list (no further authentication)
• VoIP caller PIN and associated dial plan


• PSTN-to-VoIP gateway enable and disable
• VoIP caller authentication method (None, PIN, and HTTP digest)
• Ring through to FXS enable and disable
• Ring-through tone: Configurable
• Caller ID (Bellcore Type 1) for VoIP service access
• Caller ID enable and disable
• PIN maximum retry settings
• Access-allowed caller list (no further authentication)
• Caller PIN and associated dial plan
• Least-cost routing (through outbound VoIP: Line1 dial plan

FXO control settings

VoIP answer-delay timer

• PSTN answer-delay timer
• VoIP PIN digit timeout timer
• PSTN PIN digit timeout timer
• PSTN-to-VoIP call maximum-duration timer
• VoIP-to PSTN call maximum-duration timer
• PSTN ring-through delay timer
• PSTN dialing delay timer
• VoIP DLG (Dialog) refresh-interval timer
• PSTN ring timeout timer

PSTN Disconnection Detection

• CPC (Calling Party Control) (removal of tip and ring voltage momentarily)
• Polarity reversal
• Long silence (configurable time setting)
• Disconnect tone (for example, reorder tone)
• Silence threshold

International Control

• FXO port impedance: Settings by country
• Ring frequency: Configurable
• SPA-to-PSTN and PSTN-to-SPA gain settings
• Ring frequency: Maximum setting
• Ring validation time setting
• Tip and ring voltage adjustment setting
• Ring indication delay setting
• Ring timeout setting
• Ring threshold
• Line-in-use voltage setting


Password-protected system reset to factory default

Password-protected administrator and user access authority

Provisioning, configuration, and authentication

Secure HTTP (HTTPS) with factory-installed client certificate

HTTP digest: Encrypted authentication with (MD5; RFC 1321)

Up to 256-bit Advanced Encryption Standard (AES) encryption

SIP Transport Layer Security (TLS)

Reset button bypass (provisionable)

Data networking

MAC address (IEEE 802.3)

IPv4 (RFC 791)

Address Resolution Protocol (ARP)

DNS-A record (RFC 1706) and SRV record (RFC 2782)

Dynamic Host Configuration Protocol (DHCP) server and client (RFC 2131)

DHCP client reservation

DHCP Option 159 and Option 160

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 Transport Protocol (RTP; RFCs 1889 and 1890)

Real-Time Control Protocol (RTCP; RFC 1889)

Differentiated Services (DiffServ) (RFC 2475) and type of service (ToS; RFCs 791 and1349)

VLAN tagging (IEEE 802.1p)

Simple Network Time Protocol (SNTP) (RFC 2030)

Upload data rate limiting: Static and automatic

QoS: Voice packet prioritization over other packet types

MAC address cloning

Port forwarding

SIP channels support for both UDP and TCP transport

VPN pass-through with IP Security encapsulating security payload (IPsec ESP), Point-to-Point Tunneling Protocol (PPTP), and Layer 2 Tunneling Protocol (L2TP)

Provisioning, administration, and maintenance

Web browser administration and configuration through integral web server

Telephone keypad configuration with IVR prompts

Automated provisioning and upgrade through HTTPS, HTTP, and Trivial File Transfer Protocol (TFTP)


Asynchronous notification of upgrade availability using NOTIFY

Nonintrusive, in-service upgrades

Report generation and event logging

Statistics in BYE message

Syslog and debug server records: Per-line configurable web browser

Configuration management: Backup and restore

Support for Bonjour

Support for Link Layer Discovery Protocol (LLDP) and Cisco Discovery Protocol (CDP)

Physical interfaces

One WAN 100BASE-T RJ-45 Ethernet port (IEEE 802.3)

One LAN 100BASE-T RJ-45 Ethernet port (IEEE 802.3)

One RJ-11 FXS phone port for analog circuit telephone device (tip and ring)

One RJ-11 FXO phone port for PSTN or PBX connection

Reset button

Subscriber-line interface circuit (SLIC)

Ring voltage: 40-90 Vpk configurable

Ring frequency: 16-50 Hz

Ring waveform: Trapezoidal or sinusoidal

Maximum ringer load: Five ringer equivalence numbers (RENs)

On-hook and off-hook characteristics:

On-hook voltage (tip/ring): -46 ~ -56V

Off-hook current: 25 mA

Terminating impedance: Multiple

150 nF complex impedance

Frequency response: 300-3400 Hz

Return loss (600 ohm, 300-3400 Hz) >20 dB

Idle channel noise: <10 dB (typical)

Longitudinal balance: 60 dB (typical)

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, 50-60 Hz (26-34 VA) AC input, 6 ft.(1.8m) cord

Indicator lights and LED

Line, phone, Internet, and power


Quick Start Guide

Administration Guide: Available online

Provisioning Guide: Available online


Dimensions (H x W 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 113ºF (0 to 45ºC)

Storage temperature

-77 to 158ºF (-25 to 70ºC)

Operating humidity

10 to 90% noncondensing

Storage humidity

10 to 90% noncondensing

Package contents

Cisco SPA232D Multi-Line DECT ATA

5V/2A power adapter

6-ft (1.83m) Ethernet cable

RJ-11 telephone cable

Quick Start Guide

CD with documentation including license and warranty

Warranty Information

Cisco SPA232D is covered by a Cisco standard 1-year limited hardware warranty with return to factory replacement and 90-day limited software warranty. To download software updates, please visit: .

Ordering Information

Table 3. Ordering Information

Product Name

Part Number

Cisco SPA232D Multi-line DECT ATA

SPA232D-G1 (NA)


Cisco Services

The Cisco Small Business Support Service provides "peace of mind" coverage at an affordable price and helps you get the most value from your Cisco Small Business solution. This device-level, subscription-based service includes software upgrades and updates, extended access to the Cisco Small Business Support Center, and next-business-day hardware replacement as necessary. It also provides community-based support to enable small businesses to share knowledge and collaborate using online forums and wikis to help boost business efficiency, identify and reduce risks, and serve customers better.

For More Information

For more information about Cisco Small Business solutions, visit For more information about the Cisco SPA232D and other voice gateways and analog telephone adapters (ATAs), visit or contact your local Cisco account representative.