Smart-DTA ISDN Residential VoIP Digital Telephone Adapter ...
What's the difference between ISDN, SIP and Hosted VoIP? Some illustrations.
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Transcript of What's the difference between ISDN, SIP and Hosted VoIP? Some illustrations.
ISDNConventional Office Phones Systems are made up of handsets which are wired into a physical PBX that handles all logic and function of the system. The PBX is connected to the PSTN via ISDN lines provided by BT physically cabled into the building for the exclusive use of voice calls. Internet is delivered over an independent infrastructure.
Conventional ISDN
PBXISDN
Socket
ISDN Lines
PSTN
RouterInternets
SIPA SIP Trunk is a virtual ISDN line connecting the PBX to a carrier. The SIP Trunk translates the ISDN signaling into network packets to send over the internet. SIP makes ISDN and it’s physical infrastructure obsolete.
● Increased channel capacity● Disaster Recovery● More Complex Routing Options
● Opex Savings● More Flexible Contract Terms● Short Setup Lead Time
ISDN LinesPBX
ISDN Socket
PSTN
RouterInternets
SIP Signaling
SIP
HOSTEDHosted VoIP is the entire telecoms infrastructure including both PBX and SIP Trunk virtualized in the cloud. Hosted often utilises the existing internet and network infrastructure. Hosted does not require the end user to have their own PBX which is more cost effective from a capex or hardware installation point of view. Both SIP and Hosted can benefit from network features similar to ISDN.
● Same advantages as SIP Trunks, plus● Many additional features for both inbound
and outbound calling and call handling● In-house and 3rd party Integrations
● Ability to expand functionality further● New features added as can be imagined● Vastly reduced CAPEX
PBXISDN
Socket
ISDN Lines
PSTN
RouterInternets
SIP Signaling
Hosted