Version 2.1
16 March 2006
Page 23 of 33
Vega Gateway Scenarios.
©2005-2006 VegaStream Ltd.
Examples are given in best faith – ensure that you check the capabilities of systems before
deploying them, especially the functionality of devices not designed and delivered by VegaStream.
•
Hook-flash (also known as recall) can be generated by Vega 50 FXO (not SPA-2000) in
order to request the attached FXS to switch to command mode (e.g. to initiate a call
transfer on a PBX extension port)
•
To clear a call the FXO goes ‘on-hook’ – actually it breaks the circuit that was made when
the device went ‘off-hook’
The key thing to note is: FXS devices can receive dialled number information but cannot provide it
and FXO devices can generate dialled number information but cannot receive it.
Analog applications:
9.a Vega FXS for analog telephones
Analog telephones can be connected directly into the Vega FXS ports. This allows existing or
new (and often cheap) analog telephones to be connected into a VoIP system. This can be
especially useful where Cat 5 cabling already runs analog phones to peoples’ desks; the Vega can
replace the PBX in the telecoms cabinet, the Cat 5 telephone extensions terminate on the Vega
FXS rather than on the old PBX.
A major benefit to users is that they see no change to their working environment and equipment.
Also in industrial environments, ruggedised analog phones or cheap disposable phones are much
more appropriate user devices than the more expensive, non-ruggedised IP phones.
Vega 50 FXS (SIP) can initiate call transfer (blind and consultative), put a call on hold, and can
toggle between a caller on hold and a second called party through use of hookflash and DTMF
keys on the attached telephones.
Considerations
•
Message waiting indicator lamp operation is not supported – message waiting indication
using stuttered dial tone can be used.
•
Caller ID is only supplied in sdmf or mdmf formats on the Vega 50 FXS (our range of home
gateways support more formats).
VoIPon Solutions www.voipon.co.uk [email protected] Tel: +44 (0) 1245 600560
