| Criteria | 4PSA VoipNow 1.6.3 | Elastix 1.3.2 | trixbox 2.6.1 |
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Technology | | | |
PBX engine Asterisk based | 1.2.24 | 1.4.21 | 1.4.20 |
FreePBX version | FreePBX not used | 2.4 | 2.4 |
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Usability | | | |
Web control panel | yes | yes | yes |
Per user language localization | yes | yes | yes |
Skin customization | yes | yes | no |
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Supported voice codecs | | | |
G722 | no | yes | yes |
G723 | yes (pass through) | yes (pass through) | yes (pass through) |
GSM | yes | yes | yes |
ULAW | yes | yes | yes |
ALAW | yes | yes | yes |
G726 | yes | yes | yes |
ADPCM | yes | yes | yes |
Signed Linear | yes | yes | yes |
G729 | yes | yes | yes |
Speex | yes | yes | yes |
iLBC | yes | yes | yes |
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Supported video codecs | | | |
h261 | yes | yes | yes |
h263 | yes | yes | yes |
h263p | yes | yes | yes |
h264 | no | yes | yes |
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Reliability | | | |
High availability | yes | no | no |
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Management | | | |
Multitenant | yes | no | no |
Different levels of management | yes: 4 | yes: 2 | yes: 2 |
Clients separation | yes | no | no |
Clients hierarchical view | yes | no | no |
Client separated permissions and limits | yes | no | no |
Customizable email notifications | yes | no | no |
Management of time intervals | yes | yes | yes |
Management of sound packages | yes | yes | yes |
Phone terminals provisioning | yes | yes | yes |
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Billing | | | |
Realtime postpaid billing | yes | yes | no |
Realtime prepaid billing | yes | yes | no |
Account recharges | yes | no | no |
Fixed and inherited call costs | yes | no | no |
Per destination fees | yes | yes | no |
Per destination charging intervals | yes | yes | no |
Designed to allow overselling | yes | no | no |
Client separated billing plans | yes | no | no |
Free minutes per destination | yes | no | no |
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Call features | | | |
Block Caller | yes | yes | yes |
Time interval based check | yes | yes | yes |
CallerID based check | yes | yes | yes |
Callback features | yes | yes | yes |
Call transfers | | | |
Attended (Supervised) transfer | yes | yes | yes |
Blind transfer | yes | yes | yes |
Call forwarding | | | |
Forward to Voicemail | yes | yes | yes |
Forward to IVR | yes | yes | yes |
Forward to Queue | yes | yes | yes |
Forward to conference | yes | yes | yes |
Forward on NO ANSWER | yes | yes | yes |
Forward on BUSY | yes | yes | yes |
Forward on extension NOT REGISTERED | yes | yes | yes |
Forward to external | yes | yes | no |
Ring all | yes | yes | yes |
Call pickup | yes | yes | yes |
Conferences | yes | yes | yes |
Do not disturb | yes | yes | yes |
Record conversations | yes | yes | yes |
Voicemail | yes | yes | yes |
SIP Presence support | yes | yes | yes |
Receive faxes as PDF | yes | yes | yes |
Fax to email | yes | yes | yes |
Fax send | yes | yes | yes |
IVR (Interactive Voice Response) | yes, includes IVR designer | yes | yes |
Text-to-speech support | yes | yes | yes |
Calling card management | yes | yes | no |
Over the phone credit interogation | yes | no | no |
Call queues | yes | yes | yes |
Queue agents | | | |
Supervising agents | yes | yes | yes |
Operator panel | yes | yes | yes |
Call center degree call reporting | yes | yes | no |
Detailed queue statistics | yes | yes | no |
Predictive dialer | no | yes | no |
Call center forms & script wizard | no | yes | no |
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Call reporting | | | |
Report based on account level | yes | no | no |
CDR fields filtering | yes | yes | yes |
Export of CDR fields | yes | yes | yes |
Call cost report | | | |
Report based on account level | yes | no | no |
Outlines call costs and profits | yes | no | no |
Advanced filtering | yes | no | no |
Export of report fields | yes | no | no |
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Firewall like call routing rules | | | |
Block and transfer actions | yes | no | no |
Time interval matching | yes | yes | yes |
Call source matching | yes | yes | yes |
Call destination matching | yes | yes | yes |
Best cost matching | yes | no | no |
Dial post processing rules | yes | no | no |
Import/Export routing rules | yes | no | no |
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Channels | | | |
Manual allocation of DIDs per extension | yes | yes | yes |
Automatic assignation of DIDs from pool | yes | no | no |
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Channel routable prefixes | | | |
Integrated management | yes | yes | yes |
Import/ Export call costs file | yes | yes | yes |
Clone call costs | yes | no | no |
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Integrated software | | | |
E-mail manager | no | yes | no |
Openfire IM server | no | yes | no |
SugarCRM | no | yes | no |
vTiger CRM | no | yes | no |
HUDlite server | no | no | yes |
Calendar with voice notification | no | yes | no |