<center>Instruction manual version 1.11 </center>

<center>Date of the last modification: 29.11.2010 </center>

 

 

 

Slican CTS-202.CL, CTS-203.BT and CTS-203.IP system phones that enable work with CTS-232 consoles have been designed for integration with the new family of Slican PBX-type units. CTS-202.CL and CTS-203.BT are digital system phones that comply with the U_p0 terminal, while CTS-202.IP and CTS-203.IP-POE are VoIP system phones.  

| <center>{{Ok}} </center>

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| <center>{{No}}</center>

| <center>{{No}}</center>

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| <center>{{No}}</center>

| <center>{{No}}</center>

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| <center>{{No}}</center>

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| <center>OPTION</center>

| <center>OPTION</center>

| <center>6.</center>

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| <center>7.</center>

| <center>{{Ok}}</center>

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| <center>8.</center>

| <center>{{Ok}}</center>

| <center>{{Ok}}</center>

| <center>{{Ok}}</center>

<center>(provided that the phone is installed in <BR>the same local area network with PBX)</center>

The products ensure trouble-free work on any assistant or manager’s work stand. With no doubt, they will comply with the requirements applicable to any lobby terminals. An intelligible menu ensures intuitive setup of phone parameters and adaptation to the user's preferred features. Due to the entire integration of the product and telephone exchange applications the user will be able to promptly change the settings of individual phone sets on the PBX configuration platform.

Programmable multiple-function keys ensure easy access to the PBX features, extension numbers and phone book entries. The user can check with three phone number registers:

* Public phone book: managed on a global basis, available to all PBX subscribers,

* List of subscribers: list of PBX extension numbers.

The number of system telephones to be integrated with the PBX depends on the type of PBX and is presented in below table:

!{{Hl2}}| MAC-6400

!{{Hl2}}| CCT-1668

!{{Hl2}}| CXS-0424

|CTS-202.CL/CTS-202.BT

|18

|CTS-202.IP

|CTS-203.IP-PoE

 

A maximum of five CTS-232 consoles can be connected to up to four system phones connected to the PBX, and the other system phones enable connecting up to two CTS-232 consoles. This enables expanding the number of speed access keys. This also enhances the capabilities for the management of calls with the preview showing if individual subscribers are busy. <br>

 

* 12 general purpose programmable keys, such as: subscriber status signal; speed access; PBX services; shortcuts for entries into phone books.

* Each speed access key may be dedicated to any PBX function;  

* Presentation of incoming subscribers, inclusive of the names, consistent with the entries in the phone book or PBX database;

* Option to program telephone settings via the PBX configuration program;

* Digital transmission via one pair of wires using the U terminal, up to 1 km, compatible with the PBX;

'''The phone functionality strictly depends on the PBX software release. This manual describes telecom operations and functions that are accessible only with the present software version. Some of them may be unavailable. In such a case, please contact our customer service department. '''

<center>[[File:Io_cts_5.png]]</center>

| System screen: the first screen that appears when the PBX and the phone (CTS-202.CL and CTS-202.BT) are ON.

| System screen: the first screen that appears when the phone's (CTS-202.IP) PBX is ON.

  with PBX

| This message notifies of a lost connection with the PBX. It will appear if no connection with the PBX is established within 30 seconds from the moment when the power supply is ON (CTS-202.CL and CTS-202.BT). After another 5 seconds the system will reset and attempt another connection.

| This message will appear if the phone loses its connection with the PBX during normal operations (CTS-202.CL and CTS-202.BT).

Caller's name – the name of a subscriber assigned in PBX or the name of an entry in the personal or public directory;

= Connecting CTS-202 phones up to the PBX =

== Physical connection of CTS-202 phones with the PBX ==

''The regularity of CTS-202.CL and CTS-202.BT phone operations depends on the distance between the PBX and the phone, the number of connected consoles as well as on the quality of the wiring system inside the building.''

* Ethernet cable (for CTS-202.IP and CTS-203.IP-POE) the socket marked LINE in the telephone

'''''IMPORTANT! '''CTS-202.IP and CTS-203.IP-POE system phones can be also powered by network devices with the Power over Ethernet function. There is no need to use a power pack in such a case.''

| In the case of CTS-202.CL and CTS-202.BT system phones, connect the other end of the phone line cord with the socket of the telecom service provider.  

In the case of CTS-202.IP and CTS-203.IP-POE system phones, connect the other end of the Ethernet cable to the computer network socket.

| Regular phone operations: PBX icon on the display and acoustic signal in the user's handset.

* We suggest maintaining the phone-to-PBX distances specified below:

''For the CTS-202.CL, CTS-202.BT and CTS-203.IP-POE the power pack is not included as standard but is available as an option. In the case of an extended PBX-to-phone distance and the poor quality of cables you may have trouble with regular operation of CTS-202.CL, CTS-202.BT and CTS-203.IP-POE system phones. A solution to this problem is a power pack.''

== CTS-202.IP and CTS-203.IP-POE phone configuration for integration with a PBX ==

'''''IMPORTANT! '''CTS-202.IP telephones will work only with pre-programmed PBXs. The admin must set the PBX parameters and program the keys, subject to the individual requirements of the customer. A phone is authorized in the PBX by entering its MAC address. This number is assigned individually to each phone and can be found on the label placed on the bottom of phone cover. It can also be viewed in the phone menu (VoIP - status).''

CTS-202.IP phone is by default configured for operation in local area network and for integration with a DHCP server. The phone will automatically search for the PBX and connect with it after connecting to the network and power. The phone is ready to make calls after the connection is made.

The phone will display the final question '''Set?''' Answer '''Yes'''. The phone will restart and perform initialisation. If no VoIP server address has been entered before, you will be informed that there is no connection with the PBX.  

If the CTS-202.IP phone is connected to the same local area network with the PBX, then the VoIP (PBX) server address can be acquired automatically and it is not required to enter it manually. Open the '''VoIP'''menu and then '''VoIP server''' menu and use the left context key to select [[Image:Io_cts_prawo.png]] the option '''Auto'''.

The IP Address and the name of VoIP server are supplied by the local area network administrator or PBX admin.

After connecting the phone to the local network and establishing a PBX connection, the '''VoIP''' menu is available as item 6 and has the following structure. Additional submenu appears – '''Codec'''.

* Auto – a codec will be selected automatically depending on whether the phone is used in the same local area network with the CCT-1668, MAC-6400 or CXS-0424 PBX that the phone works with. If the network is the same – G.711 codec will be used and GSM codec will be used outside the network.

'''''NOTE1! '''CTS-202.IP or CTS-203.IP-POE system phones will work only with pre-programmed PBX. The administrator must set the PBX parameters and program the keys, subject to the individual requirements of the customer. A phone is authorized in the PBX by entering its MAC address. This number is assigned individually to each phone and can be found on the label placed at the bottom of the phone's cover. It can also be viewed in the phone menu (VoIP - status).''

'''VoIP server''' – enter the IP address of the VoIP server (or name) in this menu, i.e. the address of CCT-1668, MAC-6400 or CXS-0424-type PBX.

After connecting the phone to the WAN (the Internet) and establishing a PBX connection, the '''VoIP''' menu is available as item 6 and has the following structure. Additional submenu appears – '''Codec'''.

| '''VoIP'''('''5''')

* Auto – a codec will be selected automatically depending on whether the phone is used in the same local area network with the CCT-1668, MAC-6400 or CXS-0424 PBX that the phone cooperates with. If the network is the same – the G.711 codec will be used and GSM codec will be used outside the network.

=== Error messages and troubleshooting when connecting the CTS-202.IP phone to a PBX ===

| Enter the valid IP address and the VoIP server (PBX) name.

| ''PBX not found''

| The phone has automatic PBX search enabled but the PBX was not found in the network the phone is in. Enter the PBX (VoIP server) IP address and check the phone configuration.

| The PBX name was entered but connecting the DNS server was unsuccessful.

| Cannot connect with the PBX. The PBX settings, PBX IP address might have been configured incorrectly or the PBX is switched off.

| Your phone has been configured correctly and connected to the PBX. You do not have the privileges assigned to use the phone in a PBX. Contact the PBX admin.

| The entered PBX name is incorrect. The PBX name was not found on the DNS server.

| Presentation of the number that has been assigned to your phone at the PBX level.

| This button supports a selection of PBX services or dialling another subscriber during an active call. If you press this button in the standby mode, you will enter the '''Menu >> Services'''.

* If an ACD group is present in the PBX, this key will display the view of this ACD group status. The feature depends on the specific configuration of the CTS telephone display status in the ''ConfigMAN'' application; the service should be programmed by the service team during installation of the PBX. The system displays the number of parameters such as: number of waiting calls; number of active calls; call waiting time; average call time; number of available agents.

| Missed calls('''1''')

| Received calls ('''2''')

| Dialed numbers ('''3''')

| Erase last call ('''4''')

| Last call time ('''5''')

| Last call cost ('''6''')

| Program keys ('''2''')

| Press a key

| Call forward. ('''1''')

| Don't disturb ('''2''')

| Phone lock('''4''')

| Temporarily CLIR ('''5''')

| Call intercept. ('''10''')

| Private call ('''11''')

| Working mode ('''12''')

| MCID ('''13''')

| Voicemail ('''14''')

| Ringing tone ('''1''')

| Amplification ('''7''')

| Telephone name ('''11''')

| Program version ('''13''')

== Quick Navigation via Menu ==

| Pick up the handset or press the '''SPK ON'''[[image:Io_cts_spk_on.png‎]] button.

| If you wish to terminate the call, hang up the handset or press the '''SPK OFF''' button.[[image:Io_cts_spk_off.png]]

Once you pick up the handset, the phone leaves you 15 seconds for dialling the number (from the directory or keypad). After 15 seconds the PBX will play the unavailable signal.

| Pick up the handset or press the '''SPK ON'''[[image:Io_cts_spk_on.png]] button.

| If you wish to terminate the call, hang up the handset or press the '''SPK OFF'''[[image:Io_cts_spk_off.png]] button.

| Press the '''REDIAL''' button. The phone will display the last dialled number which will be the first item on the last-dialled numbers list; you can browse the list using the [[Image:Io_cts_gora.png]] / [[Image:Io_cts_dol.png]]) keys.

| Pick up the handset or press the '''SPK ON'''[[image:Io_cts_spk_on.png]] button.

| If you wish to terminate the call, hang up the handset or press the '''SPK OFF'''[[image:Io_cts_spk_off.png]] button.

| The phone must be set in the standby mode. Press [[Image:Io_cts_dol.png]] (down arrow key).

| Pick up the handset or press the '''SPK ON'''[[Image:Io_cts_spk_on.png]] button.

If you select a single subscriber or subscriber group from the list of PBX extension numbers, the system will display the busy status on the screen. In the case of a group, the 'busy' status will be displayed if all the phones in this group are busy and the waiting queue is full.

  ---Extension numbers---

  Subscriber name

  Subscriber      (Free)

  Program          Back

| Pick up the handset or press the '''SPK ON'''[[Image:Io_cts_spk_on.png]] button.

Similar functionality is available by pressing the redial key [[Image:Io_cts_redial.png]] and then up/down key [[Image:Io_cts_gora.png]] [[Image:Io_cts_dol.png]]

 

= Use of Speed Access Keys =

<center>[[Image:Io_cts_all.png]] </center>

* Line (trunk status signal or trunk group status signalling): this parameter may be programmed by the PBX administrator only.<br/>  

  Key      (F8)

     Free

  Change    Back

== Speed Access Key Programming ==

[[Image:Io_cts_prawo.png]]

| [[Image:Io_cts_gora.png]]<br>

[[Image:Io_cts_dol.png]]

[[Image:Io_cts_prawo.png]]

Assignment of translation or the trunk quick selection function to a quick dial key is allowed to the PBX administrator only.

== Speed access Keys: Subscribers and accounts ==

Speed access keys may be dedicated to specific extension numbers or subscriber accounts. Their LEDs will let you know the status of particular subscribers or accounts by means of a special colour code as follows:

* Press and hold the preset subscriber/account key. The system will call up this subscriber/account provided it is free. If the caller activates the function '''''Urgent Ringing''''', the target phone will answer by means of a special ringing (analogue telephones) or the call will be immediately forwarded to the loudspeaker (if the subscriber has a CTS system phone).

* Press and hold the preset subscriber/account key. If this subscriber/account is being called, your phone will intercept the call <ref name="ftn4">Provided no protection from call intercepting has been activated by the admin on this subscriber/account.</ref>.

== Speed Acces Keys: Groups ==

Speed access keys may also be dedicated to specific groups. Their LEDs will let you know the status of particular groups:

== Speed Access Keys: Phone Book Entries and Services ==

Speed Access keys may be dedicated to phone book entries or services (such as e.g. DND, re-routing, etc.). If you dedicate a speed access key to a phone book entry, the LED '''will be always OFF'''. If you dedicate a speed access key to a service (except "Voice Mail"), its LED will let you know the status of this service:

* Press and release the preset phone book entry key. The system will display the preset phone book entry.

* Press and hold the preset phone book entry key. The system will start setting up the call.

Interpretation of the LED Colour Code for Individual / Group Voice Mail.  

Using the Preset Individual / Group Voice Mail Key. Press down and release the preset key.

* Press and hold the mailbox extension number preset key. The system will set up the call to the group voice mail.

== Speed Access Keys: Functions ==

You may dedicate speed access keys to the features specified below:

# '''Personal phone book''': access to the entries saved to the personal phone book (shortcut to the first option of the '''''Book''''' menu);

# '''Public phone book''': access to the entries saved to the public directory (shortcut to the second option of the '''''Book''''' menu);

# '''Search''' - search for names in the personal and public phone books (shortcut to the third option of the '''''Books''''') menu);

* Press and release the preset Function '''1÷3''' key. The system will display a corresponding '''''Book''''' menu option.<br>

Using the keys '''Up''' or '''Down''' search the required item in the phone book. The record can also be searched by entering the name using the numerical keyboard.

Pick up the handset or press the '''SPK ON '''button to dial the currently selected number from the phone book.

== Speed Access Keys: Lines ==

The speed access keys may be dedicated to individual external lines that are connected with the PBX. The term "lines" means either individual trunks or trunk groups.

'''''IMPORTANT! '''Speed access keys may be dedicated to the lines only by the admin at the PBX level. This procedure is not feasible at the phone level. ''

== Speed access Keys: Benefits ==

If the key is dedicated to the "Intercept ringing" service, the system will intercept the call from any phone belonging to the same PickUP group once you press and release this key.

You need not answer the call. Instead, you may forward it to another subscriber or to an individual/group voice mail. Just press and hold the key dedicated to a subscriber or voice mail service/group voice mailbox extension number during an incoming call.

''This option will not be available if the admin sets limits on a subscriber at the PBX level.''

| If you want to forward an incoming call without answering it, press [[Image:Io_cts_dol.png]] (down arrow - go to '''Subscriber List''').

| Press the [[Image:Io_cts_prawo.png]] '''''Transfer''''' context key.

| If you want to forward an incoming call without answering it, press the [[Image:Io_cts_prawo.png]] '''''Options''''' context key.

| Enter the number to which you want to forward the call or press the [[Image:Io_cts_dol.png]] key and look for the subscriber name.

| Press the [[Image:Io_cts_prawo.png]] '''''Transfer''''' context key.

''The 'Urgent Call' service is available subject to specific privileges of the subscriber. In the absence of such privileges, the subscriber who wants to use this service makes the call while the recipient hears a standard tone.''

''See another section of this text for another method of calling the 'Urgent Call' service.''

| After entering the '''Keys''' menu, press the [[Image:Io_cts_prawo.png]] '''''List''''' key.

= Phone books =

The CTS telephones support three kinds of phone books:

* '''''Personal phone book''''': the entries to this phone book are available with this phone only;

* '''''Public phone book''''': the entries to this phone book are available to all the PBX users, and

* '''''Subscriber list''''': list of all the PBX extension numbers.

Only the PBX admin is allowed to update the subscriber list. Phone books are saved to the PBX and will not be lost in the case of phone replacement or failure.

 

 

 

 

 

 

 

 

 

== Search for Entries to Phone book (Personal and Public) ==

| Press the ''' ''Book''''' context key.

| Select a personal or public phone book.

== Entry to the phone book ==

| Press the '''Book''' key.

| Select the phone book where you want to add a new entry ('''Personal book''' or '''Public book''').

| Press the '''''Options''''' key and then select '''Add name<ref name="ftn6">'''You can add new entries to the public phone book(the Add new entry option is active) provided you have acquired the applicable privileges from the PABX administrator.'''</ref>.

| Enter the number you wish to save to the phone book.

=== Saving Numbers to the Phone book during the Call ===

You can add the incoming call number to the phone book during the call provided the caller has presented this number.

| Search for your specific call in the call history.

You will be able to edit entries in the public phone book if you have the applicable privileges. You need no specific privileges to edit your own entries in the personal phone book.

| In the standby mode, open the '''''Book''''' menu.

=== How to Copy Entries (from and to Phone books) ===

You will be able to copy entries from and to the personal and public phone book provided you have acquired the applicable privileges to copy and save entries to the public phone book.

| In the standby mode, open the '''''Book''''' menu.

| Select the phone book from where you want to copy an entry. Once you confirm your selection, the system will start searching for the entries to this phone book.

=== How to Move Entries (from and to Phone books) ===

You will be able to transfer the entries from and to personal and public phone book provided you have acquired the applicable privileges to save entries to the public phone book.

| In the standby mode, press the '''''Book''''' key.

| Select the phone book from where you want to transfer an entry. Once you confirm your selection, the system will start searching for the entries to this phone book.

=== How to Delete Entries from Phone book ===

Only a subscriber who has acquired the applicable privileges will be able to delete entries from the public phone book.

| Press the '''Book''' key. Select the '''Search''' option.

=== How to Dedicate Speed Access Keys ===

If you use an entry repeatedly (you often dial an outgoing number that is saved to one of the phone books), you will find it useful to save this number to one of the speed access keys. Using a key programmed with this method is described in above.

| In the standby mode, press the '''''Book'''''key.

| Search for the phone book from where you wish to select the entry and assign it to a speed access key. Once you confirm your selection, the system will start searching for the entries to this phone book.

Each of the services that are available from the PBX may be directly selected on your phone. Just pick up the handset and use the keypad.

See the Slican CCT-1668.S, L, EU, or MAC-6400 and CXS-0424 PBX Operations Manuals for a description of all the services and methods of selection. From this manual, you will learn how to select the services directly from your phone menu.

== Call Transfer ==

| Your current call may be transfered to any subscriber registered with the PBX or an external caller provided you have acquired the applicable privileges from the PBX admin.

* If the caller selects a group number, the subscriber who has activated the DND service and who belongs to this group will be treated as a busy subscriber.

* If the caller selects a direct number with active DND service, the caller will receive the message: "Subscriber unavailable now; please call again later."

| Exit the '''Menu''',''' '''for instance, press the SPK OFF button.

The "Fixed Account" feature recalls the privileges of another phone or virtual subscriber to your phone. If the account is recalled on a phone itself, the system will cancel it on other phones, if applicable. A fixed account may also be called up on a locked phone.

| Type the account number.'''''IMPORTANT! '''By pressing the [[Image:Io_cts_dol.png]] key, you will be able to access the subscriber list and select the account number using the up and down arrow keys or by searching for it based on the first few letters of its name.''

== Urgent Ringing ==

'''''IMPORTANT! '''For another method of calling the 'Urgent Ringing' service - see in another part of instruction.

| Enter the number to which you want to forward the call, e.g. 123. '''''IMPORTANT! '''You can also use the arrow keys to select the type of phone book from which you want to select a target number for call forwarding. Select the phone book and look for the number using the up and down arrow keys or typing the first few letters of the subscriber’s name.''

# '''While busy'''

# '''When no answer'''

# '''While DND'''

| The system will display '''call forwarding ''' and letter '''F'''<ref name="ftn6">From  '''Call Forwarding'''</ref> on the display.  

'''''IMPORTANT!''' In addition, if the phone rings to group instead of individual subscriber, only "Calls from group" and "Unconditional" forwarding options will be active.''

Press the '''''Options''''' key and select '''Menu >> Services >> MCID'''<ref name="ftn7">'''From ''Malicious Call IDentification.</ref>

'''''2 How to switch on this service once the call is terminated by the caller:'''''

Press the '''''MCID''''' key within 30 seconds from the moment the caller has hung up the phone.<br>  

'''''IMPORTANT! '''Wait until the caller of the malicious call hangs up the phone! The target phone cannot be the first to be hung up!.''

| During the call, the caller of the three-party call can change interlocutors. In such a case, one of the partners will stay on hold.

'''''IMPORTANT! '''The caller of the three-party call can switch between the partners. To do so, press the '''Options'''key and select the partner with whom you wish to talk, using the navigation keys.''

'''''IMPORTANT! '''The three-party call can be terminated by its caller who should press '''FLASH#0'''.''

'''''IMPORTANT! '''Once the caller hangs up the phone, the system terminates the 3PTY call.''

'''''IMPORTANT! '''To switch over to one partner only (the other partner hearing a musical signal), the caller should press either '''FLASH#1 or FLASH#2 '''(where: 1 - means that the caller wants to talk with the first selected partner to this call, and 2 stands for the talk with the second partner). To restore the 3PTY call, the originator should press '''FLASH#3 '''''.

This service ensures interception of the incoming calls addressed to another PABX user provided that the subscriber who calls up this service has acquired the applicable privileges (the subscriber must belongs to the same PickUp group, i.e. call interception group).

| Pick up the handset to answer your intercepted call.'''''IMPORTANT!''''' Apart from the above mentioned method (picking up the handset) you can also intercept the call (i.e. enter the call status and skip the ringer) pressing down the '''SPK ON''' button and typing '''<nowiki>#37</nowiki>'''.

== Private Call ==

This function will change the privileges to set up the calls (subscribers' personal privileges) and register the call as a private one with the PABX buffer. Such calls are identified by the billing application for the purpose of separating business calls from private calls.

An urgent call means that the subscriber will be given a special category of access in the outgoing traffic for the period of a single call. Due to this service the call may bypass standard routes. The '''Urgent Call''' service is available only to subscribers who have acquired the applicable privileges. The service is active for the period of a single call made from the telephone.

Due to this service the caller may leave a voice message for a specific subscriber.

''If the subscriber wishes to use this service, the PABX admin will have to assign an individual voice mail for saving the messages, as well as a voice mail extension number for the purpose of service activation, new message notification, and message management.''

To switch on this service, you must set the call transfer to the extension number of the individual voice mail:

# '''While busy'''

# '''When no answer'''

# '''While DND'''

| The system will display the letter '''V<ref name="ftn8">'''From  '''Voicemail'''</ref> at the top right-hand corner of the screen to confirm that the service has been switched on.

''See the Operations Manuals of the Slican PABX for more information on this service (how to record your own welcome message - service #79; notification and play new messages).

The caller of a conference call can manage the session (to act as a ''custodian'').

* Enter the applicable phone book or external number;

* press the '''''Book''''' key and select a number from any of the phone book or extension number list<ref name="ftn9">You can also open the applicable phone book or subscriber list using the navigation keys: see section – Phone Menu (navigation via the phone menu).</ref>,

* Press a apeed access key dedicated to a specific subscriber/number.

When viewing the list of participants pick up the handset and press '''SPK ON'''. The system will activate the ringers on the telephones of the persons eligible for the conference. Once a participant receives the call, he or she will hear the message "Teleconference".

The system will activate the ringers on the telephones of the persons eligible for the conference. Once a participant receives the call, he or she will hear the music until the custodian joins the conference, by e.g. picking up the handset or pressing '''SPK ON'''.<br>

5. The conference call is now set up (the call has been answered by at least one participant and the custodian has become an active participant, i.e. he or she has picked up the handset)<br>  

# '''Add participant '''– adding a new participant to the current conference call<ref name="ftn10"> You can also add a new participant using the '''FLASH'''button: press it, dial the number and press the key dedicated to the "Conference" service while talking with this participant (or else, select this service from the menu which is available when you talk with this participant).</ref>,

# '''Ring''': set up a "cold" conference call (caller's handset on the cradle) - see ;

# '''Mute all '''– switch off microphones in all the participants' phones (the voice belongs to the conference custodian only);

The '''''Participants''''' button allows viewing the list of participants. You can scroll this list using the '''''Up/Down'''''<ref name="ftn12"> This feature is also available to the participants who use the CTS-202 series system telephones.'''''</ref> arrow keys. The system will display information on particular participants.

The custodian can return to the conference call using the procedure described in section 5 in the table.

'''Custodian''': assignment of the custodian function - Only the subscribers who use CTS-202 series system telephones may use this function.

== Call override ==

The CTS system telephone supports the "override" service. You can join a call between two other subscribers and disconnect it, if required, or leave the call without disrupting it. A person "override" can also leave the call without disconnecting the two other subscribers. This service is available subject to the applicable privileges and under the condition that none of the two subscribers is protected from a call override. The service does not depend on the subscriber's status (subscriber registered with PABX or external subscriber). This service is also performed when one of the pair of subscribers from the call you want to join is not an extension subscriber of the PABX.