Go to 'Telephony' → 'VPBX' tab → 'Subscriber Numbers' in the left-hand menu → 'Subscriber Numbers' and click 'External'.
In the 'Add External Subscriber' modal window, specify the parameters:
Number — Virtual PBX subscriber number;
Route outgoing calls through — select a number;
Connect External PBX Number — your telephone system or one hosted by a provider.
Where To Direct The Call:
Number — phone number of the external operator.
SIP URI — unique address in the sip:name@domain format. For more information, see 'Connecting and configuring SIP URI'.
Subscriber Group — select the group whose settings will be applied to the subscriber. For more information, see 'Subscriber Groups';
Record all calls — select the checkbox to enable recording. For more information, see 'Call recording';
Comment — your comment;
✅Note: Transcription works only with 'Call recording'. To enable it, see 'How to enable 'Call Recording'.Display the phone number of the forwarded caller — select the checkbox to display the customer's number when forwarding (option enabled) or the company's number (option disabled).
After configuring the settings, click 'Save'.

Also see:
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