Call Soft vs Call Soft Pro

Answering Machine

Caller ID

Send/Receive fax

Can send multiple documents

Speakerphone

Control volume and mic gain

Phonebook

With groups

Run as a service

Dialer including speed dialing and hot key

Personal greetings

Audible/Visual notification of incoming calls

Check messages from another phone

Fast forward/rewinding of messages

Hang up on unwanted callers

instant call block button

Talks

Microsoft speech 4 and 5

Microsoft speech 4 only

Record conversations

Toll saver

Import from your Windows address book

Manually or automatically save messages in mp3 format

E-mail notification with mp3

Send caller ID to users on a LAN

Answer on ring based on a specific day or time of day.

Call another phone and play a message that was just taken

Record greetings remotely

Record all incoming calls

Mailboxes

Create a message tree where a caller can
move around and retrieve specific information

Call forwarding

Distinctive ring

Fax on demand

Send multiple fax documents at once

Call scheduler

Instantly lookup caller via the Web

Forward faxes to another number upon request

Execute a program remotely

Perform numerous functions with tones the caller sends

Ability to receive a fax even if you answer the phone on another extension only to hear a fax machine

Automatically backs up all critical files, including messages and faxes, daily,

Ability to test your mailboxes without having to actually call

Hold and optionally music on hold

Self diagnostic utility. Wondering what happened during a call? Right click on any call and select "What happened"