The advantage of using APR is that you don't have to buy extra hardware such as specialized telephony boards that increase the cost of creating a call recorder. 

Voice modems evolved from their strengths in data communications to include fax and limited voice capabilities. Products designed for telephony are typically far more advanced in dealing with voice telephony. 
We have discovered that recommending specific voice modems is very difficult. It seems the various models would be gone as quickly as they appeared. Sometimes replaced by a similar model - newer, cheaper, but frequently lacking previously working features. Sometimes although the model number did not even change, what was actually in the box did.

We regularly survey modems and contact our customers for feedback to obtain more information about common modems which support V.253 / IS-101 voice standard.

We must emphasize that we cannot guarantee the compatibility of any particular modem. The information below is based on customer reports. Sometimes a modem will work on one computer and not on another. You will also note that there are some inconsistent reports in the list below. If you have doubts, purchase the modem from a store that has a return policy and test it.

The MultiModemZPX data/fax modem is ideal for telecommuters and SOHO users. It includes a built-in processor to enhance performance and data throughput. The MultiModemZPX-PCI is approved for use in many countries around the world. This means one model can ship virtually anywhere. 

Features 

• V.90/56K downloads (on 56K models connected to V.90 servers) or V.34/ 33.6K on 33.6K models with speeds up to 33.6K for uploads or peer-to-peer transfers 
  Supports V.90/K56flex dual mode
• Class 1 (56K models) and Class 2 faxing at 14.4K
• Voice support
• Plug-and-Play installation under Windows 95/98/2000 on 56K models
• Operating-system independence (ISA-bus models) and Windows 95/98/Me/2000/XP, Windows NT and Linux compatibility
• Global model with approvals in many countries for worldwide use
• Built-in processor that does the work, so your computer doesn't have to 
• Remote configuration for centralized setup and management
• Storage for two phone numbers for automatic dialing
• DTMF tone detection
• Data communications, fax and other value-added software

The MultiModemZPX data/fax modem is ideal for telecommuters and SOHO users. It includes a built-in processor to enhance performance and data throughput. The MultiModemZPX-PCI is approved for use in many countries around the world. This means one model can ship virtually anywhere. 

Features 

• V.90/56K downloads (on 56K models connected to V.90 servers) or V.34/ 33.6K on 33.6K models with speeds up to 33.6K for uploads or peer-to-peer transfers 
  Supports V.90/K56flex dual mode
• Class 1 (56K models) and Class 2 faxing at 14.4K
• Voice support
• Plug-and-Play installation under Windows 95/98/2000 on 56K models
• Operating-system independence (ISA-bus models) and Windows 95/98/Me/2000/XP, Windows NT and Linux compatibility
• Global model with approvals in many countries for worldwide use
• Built-in processor that does the work, so your computer doesn't have to 
• Remote configuration for centralized setup and management
• Storage for two phone numbers for automatic dialing
• DTMF tone detection
• Data communications, fax and other value-added software

The affordable MultiModemZDX desktop modem delivers high-speed data transfer and faxing capabilities making it ideal for the mainstream PC market. 

Features

• V.90/56K downloads (on 56K models connected to V.90 servers) or V.34/33.6K on 33.6K models with speeds up to 33.6K for uploads or peer-to-peer transfers
• Class 1 (56K models) and Class 2 faxing at 14.4K
• Voice mail support and full-duplex speaker phone operation on voice models
• Dial-up phone line connectivity for asynchronous equipment
• Phone number storage for automatic dialing
• Automatic call answering
• Automatic rate detection and negotiation
• Small footprint and stackable design
• Custom installation support (depending on model) with features like 11-bit support, Multi-Tech command set, and remote configuration
• Multi-language data/fax software for Windows
  

The MultiModemZBA corporate user modems provide high-speed data transfer and fax capabilities for small businesses, telecommuters and SOHO users. Features like remote configuration, callback security and 2-wire leased line support set the MultiModemZBA apart from other basic desktop modems. In addition, it is approved for use in many countries around the world. This means one model can ship virtually anywhere.

Features

• V.90/56K downloads (from V.90 servers) and 33.6K data rates for uploads or peer-to-peer transfers 
• Class 1 and Class 2 faxing at 14.4K
• Windows Plug-and-Play operation
• U.S. Caller ID reporting
• Remote configuration for centralized setup and management
• Phone number storage for automatic or DTR dialing
• Pass-through, fixed, and variable callback security
• Voice mail support and full-duplex speaker phone operation on voice models
• Global model with approvals in many countries for use worldwide
• Multi-language data/fax software for Windows
• Self-resetting lightning protection
• Small footprint and stackable design
• Flash memory for easy updates

Acorp modems feature 56k chipsets for maximum speed communications. Use your Acorp high-speed modem for fast connectivity to the Internet, speedy interactive game playing and downloads of large files.
When used with the suitable software you can take advantage of multiple Acorp voice and fax modem features including:
Send & Receive faxes from your PC: Using the supplied software, Acorp modems can be used to quickly and simply send and receive faxes at 14400 directly from your computer.
Telephone Answerphone Machine: Use the Acorp modem as an answering machine on your PC.
Call discrimination: Acorp modems can automatically tell the difference between a fax and voice call once answered. 

Model Name M-56PIH
Chip Set Conexant RH56D-PCI (CX06834-11)
Line Connection PSTN,2 wires
Data Transmission BELL 103 and BELL 212A K56 flex and V.90 , V.92
Modem-on-Hold
PCM upstream Fax Transmission Send/Receive
Fax Group 3
Error Correction MNP 2-4/V.42 LAPM
Data Compression MNP 5/V.42 bis/V.44
Programmable Volume Control Yes
Caller ID Yes
OS Support Win95/98 , Win ME/Win2000/WinXP
System Requirement P450 MMX + 256K Cache 64M RAM
Full duplex speaker phone YES
Voice Answering machine

Model Name M-56PIS
Chip Set Conexant CX 11252-12
Line Connection PSTN,2 wires
Data Transmission BELL 103 and BELL 212A K56 flex and V.90 , V.92
Modem-on-HoldV.
PCM Upstream Fax Transmission Send/Receive G3 Fax
Error Correction MNP 2-4/V.42
Fax Class 1 Communication Model Asynchronous
DTE Speed (MAX) 115,200 bps
Transmit Level -13dB
Auto Dial & Auto Answer Yes
Programmable Volume Control Yes
OS support Win95/98 , Win ME , WIN2000, WINXP
System Requirement P450 MMX + 128M RAM
PCI Specification. PCI V2.2 Specification
Upgrade Software

Specification Model Name 9M56EUS
Chip Set Conexant Chipset
Line Connection PSTN,2 wires
Data Transmission Bell 103 and Bell 212A
Error Correction MNP 2-4/V.42 LAPM
Data Compression MNP 5/V.42 bis Telephony/
TAM V.253 commands
Synchronous Access Mode(SAM) V.80
Synchronous Access Mode (e.g., H.324)
Fax Class 1 Communication Model
Asynchronous DTE Speed (MAX) 115200bps
Auto Answer YES
OS WIN 98 , WIN 2000 , WIN ME , WIN XP
Data Interface USB1.1 (full speed 12Mbps)
Telephone Interface PSTN Line through RJ-11
Power Supply Board Form USB max 1w
Card Dimension 100 * 54 * 25mm
System Requirement P-200MMX 16M RAM

Chipset, Intel V.92 PCI Modem with Data / Fax / Voice
Controller-less based

DATA MODE
ITU-T V.92 data mode with receive rates up to 56Kbps and send rates up to 48Kbps.
ITU-T V.90 data mode with receive rates up to 56Kbps and send rates up to V.34 rates.
ITU-T V.34, V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103.
ITU-T V.42 LAPM and MNP 2-4 error correction.
ITU-T V.44, V.42 bis and MNP 5 data compression.
RTS/CTS and XON/XOFF Flow Control.

FAX MODE
Fax mode with send and receive rates up to 14.4Kbps.
ITU-T V.17 and V.29 compliant.
EIA/TIA 578 Class 1 command set.

VOICE MODE
Full-duplex, echo-cancelled digital speakerphone.
ADPCM, Linear and CL1 Voice Compression.
Up to 11Khz Sampling Rates.
IS-101 Voice commands.

Internal Description:
Support ITU-T V.92/V.90 standard with receive rates up to 56Kbps and transmit rates up to 48Kbps & 33.6Kbps respectively.
Fax mode with transmit and receive rates up to 14.4Kbps.
Support PnP specification.
PCI 2.2 Compliant.
Microphone and speaker I/Os for full duplex speakerphone function.
Data/Fax/Voice communication software suit provided.

Chipset AGERE Mars3.2(DSP1648)solution 
Integrated PCI interface
Operating System Support Windows 95, 98, 2000, ME, XP, Windows NT and Linux 
Host-based Controller utilizing PC host CPU(Pentium*) 
V.92 and V.90 technology allow data to be received at speed up to 56 Kbps from a digitally connected central site modem. 
Support Fax Class 1 send and receive rates up to 14400 bps. 
Telephone Answering Machine (TAM) Function enabled with sound card. 
V.42 LAPM and MNP error correction. 
V.44, V.42 bis and MNP 5 data Compression. 
Communication software compatible AT command set.
DATA MODEM 
V.92, V.90, V.34bis, V.34, V.32bis, V.32, V.22bis, V.22 A/B, V.23, V.21 ,Bell 212A and Bell 103.
Received data from a digital source using V.92 or V.90 compatible entral site modem over the digital telephone network portion of the PSTN at line speeds up to 56 Kbps with automatic fall-back depends on line condition.
FAX MODEM 
ITU-T V.17 , V.29 , V.27 ter and V.21 channel 2 . 
TIA/EIA 578 Class 1 FAX send and receive speeds of 14400, 12000, 9600, 7200, 4800 or 2400 bps.
VOICE/AUDIO MODE TAM through the microphone and speaker interface of sound card
ERROR CORRECTION Support V.42 LAPM, MNP 2-4
DATA COMPRESSION Support V.44,V.42 bis and MNP 5
DIALING TYPE Tone or Pulse dialing.
FLOW CONTROL
Both transmit and receive fax data are buffered within the Modem.
Data transfer to and from the DTE is flow control by XON/XOFF and RTS/CTS.

Specification Model Name 9M-56EMTU
Chip Set IC+IP 568X (TOPIC )
Line Connection PSTN,2 wires Data Transmission BELL 103 and BELL 212A
ITU-T V.21 (300 bps)
ITU-T V.22 (1200 bps)
ITU-T V.23 (1200 bps)
ITU-T V.22 bis (2400 bps)
ITU-T V.32 (9600/4800 bps)
ITU-T V.32 bis (14400/12000/7200 bps)
ITU-T V.34 bis
ITU-T V.90 ITU-T V.92 Quick connect
Modem-on-Hold
PCM upstream Fax Transmission Send/Receive G3 Fax
ITU-T V.27ter (4800 bps)
ITU-T V.29 (9600 bps)
ITU-T V.17 (14400 bps)
Error Correction MNP 2-4/V.42 LAPM
Data Compression MNP 5/V.42 bis
Command Set Enhanced AT¨
Command, Fax Class 1 Communication Model Asynchronous DTE Speed (MAX) 115,200 bps
Auto Dial & Auto Answer Yes
Programmable Volume Control Yes
Dialing Mode Touch Tone PTT
OS Support Win95/98 , Win ME/Win2000/WinXP
Country Dependent Telephone Interface PSTN Line through RJ-11

Model Name: 9M56EI
Intel chipset, V.92 RS232 Modem Data/Fax/Voice

Specifications
ITU-T V.92/V.90 data mode with receive rates up to 56Kbps and transmit rates up to 48Kbps & 33.6Kbps respectively.
ITU-T V.34, V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103.
ITU-T V.42 LAPM and MNP 2-4 error correction.
ITU-T V.44, V.42 bis and MNP 5 data compression.
RTS/CTS and XON/XOFF flow control.
V.250 and V.251commands.

FAX MODE
Fax mode with transmit and receive rates up to 14.4Kbps.
ITU-T V.17, V.29, V.27 ter, and V.21 channel 2.
EIA/TIA 578 Class 1 commands.

VOICE MODE
TAM
V.253 commands.
SPEAKERPHONE
Full-duplex, echo-cancelled digital speakerphone.
ITU-T V.70 DSVD upgrade option.

The CN5614XE are external voice, fax, and data modems. These models allow users to speak hand free over the phone line via its Full-Duplex Audio system. They come with Complete Voice Mail and Telephone Answering capabilities that allow the modem to receive and take messages from incoming voice calls. The CN5614XE are fully compliant with current Windows 95 and Windows 98 standards. The modem package contains an external modem, RJ-11 phone cable, quick installation guide, modem driver Win 95/98/NT, communications software, AC adapter and an RS-232 cable.

Key features

• Windows operating system
• ITU-T V.92 Standard
• Full-Duplex speakerphone
• Voice Mail and Answering Machine
• Dual RJ-11 phone jacks
• Asynchronous Operation
• Auto dial/answer
• FCC and CE Mark approved

CN5614RV, Conexant's HSF ( Host Processed) solution with complete set of industry standard features for high speed data, fax and TAM (Telephone Answering Machine) applications.

Key Features

• Support ITU-T V.92/V.90 standard with receive-rates up to 56Kbps and send-rates up to 48Kbps.
• Fax mode with receive-rates and send-rates up to 14.4Kbps.
• Support PnP specification.
• PCI 2.1 and 2.2 compliant.
• Data/Fax/TAM communication software suit provided.
  
  
  

Intel PCMCIA V.92 DATA/FAX/TAM Modem

CNFM560-CF is a PCMCIA standards compliant Modem that uses Intel's hardware based chip solution with complete set of industry standard features for Data, Fax and TAM applications

Key Features

• Support ITU-T V.92 standard with receive rates up to 56Kbps and transmit rates up to 48Kbps respectively.
• Fax mode with transmit and receive rates up to 14.4 Kbps.
• Support PnP specification.
• PCMCIA Type II and Type III compliant.
• Support Telephone Answering Machine (TAM) and voice annotation through provided software.
• Data/Fax/TAM communication software provided.
  

CIS WS-5614PS3F(G)

Features
Chipset name: Conexant RH56D Host-Controlled(CX06834-11) chipset
Integrated PCI MODEM V.92/ V.90 Controlled
DAA Configuration: Mono-pack DAA

Data mode
Quick Connect
Modem-on-hold
V.44 data compression
V.90,V.34,V32 bis,V.22bis,V.23,and V.21; Bell212A Bell 103
ITU V.92 data modem with receive rates up to 56K bps and send rates up 48K bps

Fax mode
modem with send and receive rates up to 14.4kbps
V.17,V.29,V.27 ter ,and V.21 channel 2
EIA/TIA 578 class 1 and T.31 class 1.0 command

Speakerphone/TAM
V.253 commands
8-bit £g-Law/A-Law coding(G.711)
8-bit/16-bit linear coding
8 KHz sample rate
TAM support with concurrent DTMF detect, ring detect and caller ID detect

Interface
PCI Bus Specification version 2.2

System Requirements
Windows 9x/2000/ME operating systems
Pentium 166 MHz MMX-compatible PC or greater
16 M byte RAM or more

Operating system Support
Windows 2000, Windows98SE, Windows ME

Hiro Intel 56K Data Fax Voice Modem, V.90, PCI

This internal PCI Hiro modem uses the state-of-the-art single chip software control. Besides, it has the advantages of high quality and high reliability with hardware data flow control technical design. This internal PCI modem is compatible with Windows 95, 98, 2000 and XP. Moreover, it follows the V.92 standard, so you can surf the Internet at 56K speed, and it decreases PCI slot occupation for more convenience.

Specifications:
Intel Chipset
Plug and Play PCI bus interface
Data mode capabilities: V.90 56 Kbps; V.92 Ready ITU-T V.34 33.6 Kbps and fallbacks
Fax mode capabilities: ITU-T V.17, V.29, V.27ter, and V.21ch2 Group 3 (TIA/EIA-578 Class 1 and Class 2)
Compliance with ACPI 1.0 and PCI Power Management Interface 1.0, supporting the D3cold Wake-on-ring
PC99/PC2001-compliant with support for V.250, V.251 and V.253 commands
Supports Microsoft Windows Unimodem V and TAPI specifications
V.80 (H.324 software stack-compatible)

Minimum System Requirements:
Windows 95/98(SE)/ME, Windows2000, WinNT, XP, Minimum 166 MHz Pentium CPU with MMX technology

Amigo V.92 External Voice Modem 

Specifications
Part Number: AMI-2501X Intel's hardware-based solution with complete set of industry standard features for high speed data, fax, and voice applications.
Support ITU-T V.92/V.90 standard with receive-rates up to 56Kbps and transmit-rates up to 48Kbps & 33.6Kbps respectively
Fax mode with transmit-rates and receive-rates up to 14.4Kbps
Microphone and speaker I/Os for full duplex speakerphone function
Data/Fax/Voice communication software suit provided

Data Mode: ITU-T V.92/V.90 data mode with receive rates up to 56Kbps and transmit rates up to 48Kbps & 33.6Kbps respectively
ITU-T V.34, V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103
ITU-T V.42 LAPM and MNP 2-4 error correction
ITU-T V.44, V.42 bis and MNP 5 data compression
RTS/CTS and XON/XOFF flow control
V.250 and V.251 commands

Fax Mode: transmit and receive rates up to 14.4Kbps; ITU-T V.17, V.29, V.27 ter, and V.21 channel 2; EIA/TIA 578 Class 1 commands

Voice Mode: TAM: V.253 commands; Speakerphone: Full-duplex, echo-cancelled digital speakerphone; ITU-T V.70 DSVD upgrade option

Hardware Interface: Two RJ-11 jack for line & phone connection; Two audio jack for speaker & microphone connection; One RS-232 jack for host computer connection; One power jack for 9V/1A AC power connection

OS Support: Windows 9X ( 95, 98 & 98SE ), ME, XP, 2000, NT
System Requirement: Pentium 166 MHz MMX-compatible PC or greater; 32 Mbytes RAM or more;5 Mbytes free disk space or more.