Supported telephony functions for ProCall NEX

State of knowledge

May 2026

ProCall NEX	ProCall NEX 2506.0 based on ProCall 8 V 8.8
PBX/Cloud PBX	Voice Services

Action	ProCall Desktop for Windows		ProCall Mobile app SIP extension
Action	TAPI	SIP extension	Android	iOS
Dial	☑	☑	☑	☑
Hang up	☑	☑	☑	☑
Answer call	○	☑	☑	☑
Hold call	☐	☑
Call back	☑	☑
Reject call	☑	☑	☑	☑
Forward call (without answering)	☑	☑
Forward call (after answering)	☑	☑	☑ / ☐ ^*3	☑
Set up a consultation call	☐	☑	☑
Toggle	☐	☑	☑
Connect a consultation call	☑	☑	☑
Forward second call (without answering)	○	☑
Accept second call	☑	☑
Reject second call	☑	☑
Forward second call (without answering)	☑	☑
Forward second call (after answering)	☑	○
Second call on SIP line			Caller receives busy	Caller receives busy
Incoming call on SIP line while active mobile phone call
Answer call			☐	☑ mobile phone call on hold **
Reject			☐	☑
Incoming mobile phone call while active SIP line call
Answer call			☑ SIP line call is terminated	☑ SIP line call on hold
Reject			☑	☑
Create a conference call (3 participants)	☐	☑
Add a further participant to a conference call	☐	☐
Remove a participant from a conference call	☐	☐
Pickup call
TAPI - TAPI	☑	☑
TAPI - SIP	☑	☑
SIP - TAPI	☑	☑
SIP - SIP	☑	☑
DTMF	☑	☑	☑	☑
Dial ringing tone	○	○

Set Call forwarding	☑	☑
Call protection / DoNotDisturb
via presence	☑	☑
via line	☑	☑	☑	☑

☑	Function available
☐	Availability or function planned/in realization
—	Not relevant
○	Not applicable due to technical limitations
◊	Function not tested, full tests are pending
^*1	Presentation of hold state planned
^*2	Call forwarding by UCServer configurable for internal/external/all calls always or while busy
^*3	Eintrag: bei Verwendung des nativen ProCall Mobile In-App Gesprächsfensters Eintrag: bei Verwendung des Android Gesprächsfensters über ConnectionService
**	Depending on the functions of the network provider
***	Supported functions for SIP lines in ProCall Mobile apps for connection via estos UCConnect

Further information