Settings > Providers and PBXs > Settings Telephone Providers and PBXs

Settings Telephone Providers and PBXs
Proceed as follows:
Using the telephone (page   > Ρυθμίσεις > Πάροχοι & ιδιωτικά τηλεφωνικά κέντρα)
Provider/PBXs settings
Όνομα 
Enter provider or PBX name.
Τομέας 
Requirements:
Enter domain. The domain (also known as a "SIP domain" or "SIP realm") is required for the VoIP address. The VoIP address of a subscriber consists of the VoIP number and the domain, separated by the @ character: <subscriber>@domain.
 
Τύπος θύρας δικτύου 
A network interface is an interface that enables a computer or a network component access to a computer network. Setting the network interface type allows you to operate the telephone on different networks, for example, VLANs or VPNs.
Προεπιλεγμένο δίκτυο Default network is used.
VPN VPN is used.
  Καταχωρητής
The registrar is the IP address or URL that you receive from your VoIP provider for login.
Important: Every port opening on the router is a security risk. Perform the appropriate security measures.
Notes:
The registrar should only be disabled if the provider requires this.
No NAT Keep Alive is performed if the registrar is disabled.
An internal network is usually protected from external manipulation by, for example, a firewall integrated in the router. Without NAT Keep Alive, the firewall's security functions will defend you against attempted accesses from the Internet.
That is why you may need to set up port forwarding for incoming SIP packets in the router for the Θύρα SIP set up in the provider's/PBX's configuration.
 
 REGISTER requests are sent to the registrar .Additional entries must be made:
Διεύθυνση καταχωρητή 
Enter registrar address as IP address or URL.
Θύρα καταχωρητή (1...65535) 
Enter registar port.
Χρονικό διάστημα για την εγγραφή (λεπτά) (1...60) 
Enter registration interval.
 
  Διακομιστής μεσολάβησης Outbound
The outbound proxy is an intermediate server that processes all VoIP requests and connections going to the provider (except for registration).
Requirements:
Απενεργοποιημένο: Disables the outbound proxy.
Λήψη αυτόματα: Automatically determines an outbound proxy.
Λήψη από τον χρήστη: Enables you to enter an outbound proxy.
If the Λήψη από τον χρήστη option has been selected, additonal entries must be made:
Outbound proxy IP/URL 
Enter outbound-Proxy IP/URL.
Θύρα διακομιστή μεσολάβησης Outbound (1...65535) 
Enter outbound proxy port.
Note: You find an overview of the PBX ports in the Configuration Manager of the PBX under Overviews > Ports.
 
SIP
Θύρα SIP (1...65535) 
The SIP port is a port on the local system that is used as a starting point for the SIP transfer.
Notes:
The SIP port must be different for each provider/PBX.
You find an overview of the PBX ports in the Configuration Manager of the PBX under Overviews > Ports.
 
Enter SIP port.
 
Χρονόμετρο συνεδρίας SIP  
 The SIP session timer regularly verifies if the call connection still exists. (The telephone/PBX cannot recognize if the provider interrupts the call connection).
Διάστημα για το χρονόμετρο συνεδρίας SIP (λεπτά) (5...6) 
Indicates after how many minutes the SIP session timer should check the call connection.
Note: The enabling of the SIP session timer can cause increased breaks in conversations after the set interval, if a provider has not implemented the renewal of the session cleanly. In this case, you should disable the SIP session timer.
 
  Πρωτόκολλο μεταφοράς SIP
UDP (User Datagram Protocol) is used to send data packet over non-secure communication lines without a connection. This means that successful transmission is dependent on the application and is therefore not always guaranteed. UDP itself does not verify whether data has been transmitted successfully. When a UDP packet is sent, the sender cannot assume that the packet will indeed arrive at the recipient. This particular protocol needs only a small amount of additional information, and results in a better data throughput rate in a well-functioning network, e.g., on a LAN. UDP is used, e.g., for the DNS (Domain Name Server).
TCP (Transmission Control Protocol) is a transport protocol that segments data into packets up to a specified size and reliably sends these individual data packets in the correct sequence to the recipient address. In this process, every data packet sent must be resent until it has been confirmed as arrived. In order to make sure this happens, a large amount of information is sent along with the actual payload data. Most Internet services are implemented with TCP, e.g., HTTP (WWW), SMTP/POPS (e-mail), etc.
Important: If encryption is enabled by SIPS, the TCP transport protocol is used. Manual settings are overwritten.
 UDP: UDP is used.
 TCP: TCP is used.
 
Τύπος διακομιστή 
Προεπιλεγμένος διακομιστής SIP: Server for the normal system telephone operation.
Διακομιστής Broadsoft: Server for providers with Broadsoft certification.
ESTOS CSTA (ECSTA): Server for the use of uaCSTA.
 
Session Initiation Protocol Security (SIPS)  
Requirements:
Important: If you are using this on the PBX, the PBX specifies the encryption method. The PBX overwrites manual settings.
 Overhearing of VoIP conversations will be prevented, as these connections are encrypted. The connection setup and termination, and also signalling, are encrypted with SIPS. The call data is encrypted with SRTP.
Note: If you have saved a root certificate for encrypting calls in your PBX, this is uploaded automatically to the telephone. You must enter the root certificate fingerprint in the telephone so that the root certificate can be verified.
Set PBX Account: Μοναδικό χαρακτηριστικό για το πιστοποιητικό SIPS . Enter fingerprint.
Set SIP account: Εισαγωγή πιστοποιητικού . Import certifcate from the hard disk.
Δομή URL 
SIPS: Encryption of SIPS via TLS.
SIP/TLS: Encryption of SIP via TLS.
 
Απενεργοποίηση ελέγχου ονόματος κεντρικού υπολογιστή  
 No verification whether the certificate belongs to the domain/IP.
NAT
NAT (Network address translation) converts an IP address of an e. g. private network into an IP address of the public network. All computers that communicate with each other within a private network, receive Internet access via only one IP address. The internal IP addresses of the private network are not accessible for the Internet.
  Διέλευση NAT SIP
If NAT traversal is switched on and a query is sent from a local IP address to the public network, the sending IP address is swapped with the public IP address. This function is performed in the reverse direction for the reply.
Requirements:
STUN server set up for the provider/PBX, if the Ενεργοποιημένο με χρήση STUN option has been selected
If the Ενεργοποιημένο option has been selected: the Καταχωρητής enabled for the provider/PBX
Important: Every port opening on the NAT router is a security risk. Perform the appropriate security measures.
Ενεργοποιημένο  : NAT traversal is performed by the provider/PBX. The SIP request also contains an "rport" part in which the IP addresses used here (local, public) are transported.
απενεργοποιημένο  : NAT traversal is not performed by the provider/PBX. The router, which connects the Local Area Network with the Internet, should be a properly functioning, SIP-aware router which performs NAT traversal.
Ενεργοποιημένο με χρήση STUN  : NAT traversal is performed by the provider/PBX. To achieve this, you must also enter a Διακομιστής STUN under Ρυθμίσεις.
Note: If Ενεργοποιημένο is selected: if there are problems with unilateral call connections, a STUN server should be used (enabled when you are using STUN).
 
  Διέλευση NAT RTP
If NAT traversal is switched on and a query is sent from a local IP address to the public network, the sending IP address is swapped with the public IP address. This function is performed in the reverse direction for the reply.
Requirements:
STUN server set up for the provider/PBX, if the Ενεργοποιημένο με χρήση STUN option has been selected
If the Ενεργοποιημένο option has been selected: the Καταχωρητής enabled for the provider/PBX
Important: Every port opening on the NAT router is a security risk. Perform the appropriate security measures.
απενεργοποιημένο  : NAT traversal is not performed by the provider/PBX. The router, which connects the Local Area Network with the Internet, should be a properly functioning, SIP-aware router which performs NAT traversal.
Ενεργοποιημένο με χρήση STUN  : NAT traversal is performed by the provider/PBX. To do this, you must also specify a STUN server.
 
STUN server
A STUN server provides subscribers on a private network information on request. This information includes the IP address and port outside their private network that is considered as the source of their data. This information is entered in the requests, instead of the actual private IP address/port.
 IP/URL διακομιστή STUN
Enter STUN server IP/URL.
 Θύρα διακομιστή STUN (1...65535)
Enter STUN server port.
 STUN server query interval (min) (1...60)
Enter interval.
Requirements:
Note: If there are problems with unilateral call connections, enabling the RTP might help.
Important: Each port forwarding is a security risk. For this reason, we recommend you use this function only if absolutely necessary.
 
 
 
  NAT-Keep-Alive
Keep alive maintains the connection between client and server by sending NAT keep alive packets which prevent the interruption of the connection. An intveral for the sending of those NAT keep alive packets must be determined. This interval indicates after how many seconds NAT keep alive packets are send to maintain the NAT mapping in the firewall.
 NAT keep alive is enabled and an additional entry must be made:
 NAT keep alive interval (sec.) (15...255)
Enter NAT keep alive interval.
Note: Some providers lock accounts if the Διάστημα NAT-Keep-Alive (s) is too short. As a rule, this is reported with error message 503 during SIP registration. If this problem occurs, we recommend you reduce the value (e.g. to 180).
 
 
RTP
Κωδικοποιητές  
A codec is a method that encodes (digitises) analogue voice data for transmission and again decodes again, meaning converts into back into voice. There are various codecs that feature different voice data compression rates thereby require different band widths for data transmission. The equality of VoIP calls is dependent on the codec used.
Notes:
If a codec with high bandwidth (e.g. G.711) produces too much interference in the call quality, the connection bandwidth might not be sufficient. If these types of disruptions happen frequently, we recommend you select codecs with a lower band width.
Not every codec is supported by every provider.
 
Η μέγιστη δυνατή ποιότητα  : Codec G.722 has priority level 1, Codec G.711 has priority level 2 and Codec iLBC has priority level 3.
Η μέγιστη δυνατή συμπίεση  : Codec iLBC has priority level 1, Codec G.722 has priority level 2 and Codec G.711 has priority level 3.
Αναγκαστικό G711  : Codec G.711 is required.
 
Μουσική αναμονής  
Requirements:
 When putting a caller on hold, music on hold will be played.
 
Σηματοδότηση DTMF  
At DTMF signalling, a sound of two overlapped sound frequencies is assigned to each digit of the keypad. Here, you must select how the DTMF signalling is to be transmitted. This is critically depened on the provider and the transmission path.
Note: If your are unsure which DMFT signalling type you must select, you cand find out the right type by trying them out.
Outband με τοπικό ήχο επιβεβαίωσης, κατά το RFC2833  : The telephone uses different channels to transfer DTMF signals and voice data. The DTMF signals are filtered out of the voice data. You hear a confirmation tone to confirm that the DTMF signals have been sent successfully.
Inband, DTMF signals sent through the audio channel  : The telephone uses the same channel (DTMF tones) to transfer DTMF signals and voice data.
Outband, κατά το RFC2833  : The telephone uses different channels to transfer DTMF signals and voice data. The DTMF signals are filtered out of the voice data.
 
Προσωρινή μνήμη διακυμάνσεων (ms) (40...160) 
The size of the jitter buffer shows how many RTP packets can be buffered, to bridge or compensate disruptions.
Jitter buffer size entry in milliseconds (duration of the audio signal).
Lower values: A lower number of RTP packets can be cached in order to buffer disruptions or to compensate for them.
Greater values: A greater number of RTP packets can be cached in order to buffer disruptions or to compensate for them.
SRTP 
To prevent anyone from eavesdropping VoIP conversations, you can encrypt these connections. The connection setup and termination, and also signalling, are encrypted with SIPS. The call data is encrypted with SRTP.
Important: If you are using this on the PBX, the PBX specifies the encryption method. The PBX overwrites manual settings.
απενεργοποιημένο: Forces de-activation of call data encryption by SRTP. The connection is not established if the call partner (VoIP provider, other PBX in the sub-system operation, external VoIP subscriber) requires call data to be encrypted by SRTP.
προτιμώμενο: Switches on negotiation for the encryption of call data by SRTP. When a call is made, the call partner will be asked if encryption is possible. If so, the call data will be encrypted and then transmitted, if not, the call data will not be encrypted.
προδιαγραφόμενο: Forces activation of call data encryption by SRTP. The connection is not established if the call partner (VoIP provider, other PBX in the sub-system operation, external VoIP subscriber) does not support the encryption of call data by SRTP.
 
NUMBER SETTINGS
  Χρήση αριθμών κλήσης τηλεφωνικού κέντρου
Public exchange subscriber numbers must be used for PBXs which allow you to dial external telephone numbers without preceding exchange line access numbers or characters (e. g. 0 or **). Such PBXs automatically detect whether exchange line access is required or not.
Requirements:
Set type Ιδιωτικό τηλεφωνικό κέντρο
 Call acceptance rules for internal and external will be applied when a call comes in. In addition, you can forward an incoming call to an external telephone number without having to dial the exchange line access number.
 
Ψηφίο πρόσβασης τηλεφωνικού κέντρου 
Requirements:
Selected type Ιδιωτικό τηλεφωνικό κέντρο (page Settings > Providers & PBXs > Provider)
Note:
After you dial the exchange line access number, the external dial tone indicates that an external line is free. The external number can then be dialled.
You can also request an exchange line from the telephony app. Tap on to display the list of external contacts and dial an external account (public exchange). Tap on to display the list of internal contacts. Only internal telephone numbers can be dialled.
The exchange line access number of the PBX is „0“ in the factory settings but can be changed in some PBXs.
 
Enter the exchange line access number. When used as a system telephone the exchange line access number is automatically transferred from the PBX.
 
Ακολουθία πληκτρολογίου 
Keypad sequences enable you to control features by entering characters and number sequences via the phone keys, e.g. to make pick-ups or InterCom announcements.
Important: If operated as a system telephone on the PBX, the keypad sequences are predefined by the PBX. The PBX overwrites any keypad sequences you have entered manually.
Note: When selecting the type Πάροχος VoIP (Διαδίκτυο) under Ρυθμίσεις > Πάροχοι & ιδιωτικά τηλεφωνικά κέντρα > Διαμόρφωση > Πάροχος > Τύπος some keypad sequencens and the exchange line access number are not available.
 
Enter keypad sequence  : The following keypad sequences for PBX operation are available:
Ανάληψη κλήσης: The keypad sequence is required to carry out pick-ups on PBXs where a pick-up sequence is mandatory for this function. Information from SIP notify messages are not taken into consideration.
Αναγγελία ενδοεπικοινωνίας: The keypad sequence is required to make an InterCom announcement. InterCom announcements can also be made on accounts where the telephone is not used as system telephone.
Ανοικτή συνομιλία ενδοεπικοινωνίας: The keypad sequence is required to enable Intercom hands-free calling at a destination which does not support automatic call acceptance.
Επιβεβαίωση ειδοποίησης: The keypad sequence is required to acknowledge an alarm call with the keypad.
Ουρά αναμονής: For moving into the waiting loop.
 
Αξιολόγηση εισερχόμενων μηνυμάτων SIP
Depending on the SIP provider, the phone number of the caller can be in different locations in the SIP message. The following options and settings must be selected and made to determine at which location of the SIP message the phone number shall be searched.
Two different phone numbers can be transmitted: The actual phone number of the caller (screened number/network provided number) and a number self-selected by the caller (unscreened number/user provided number). If a network provided number is extracted from the SIP message, functions such as Call Through can be used.
Είδος αξιολόγησης 
Προεπιλογή: Selects an evaluation method for phone numbers which will work for most providers.
Standard (use From headers as screened-number): Selects an evaluation method for phone numbers which will work for most providers. The user provided number (corresponds to CLIP no screening) of the header “From“ will be taken over into the network provided number. The phone numbers can, for example, be used for Call Through via VoIP.
Caution: If you have selected this option, your telephone and your PBX are vulnerable to attacks, for example by transmission of a phone number manipulated by the attacker. Therefore, to protect your telephone and PBX, assure yourself that the VoIP provider has integrated sufficient security measures in the number presentation.
Όπως περιγράφεται στο RFC3325: Selects a phone number evaluation method in accordance with RFC 3325 (http://www.ietf.org/RFC/rfc3325.txt). This method of evaluating phone numbers is used if the number presentation is guaranteed by security mechanisms.
ορισμένο από τον χρήστη: If the Προεπιλογή and Όπως περιγράφεται στο RFC3325 options are unsuccessful, you can also define your own method of evaluating a phone number within certain limits.
Notes:
The phone number to be evaluated should preferably be canonical (+445306.... or 00445306…). Otherwise it is not used for evaluation.
The designations used for the settings match the designations used in Wireshark.
Network Provided Number Network-verified incoming phone number: The sequence entered in the invite is searched for the phone number which can be analysed.
User Provided Number Non-verified incoming phone number (corresponds to CLIP no screening): The sequence entered in the invite is searched for the phone number which can be analysed. Optional: is not transferred by all providers.
User-provided name: Caller's name in plain text. Optional: is not transferred by all providers.
 
Διεθνοποίηση άγνωστων αριθμών κλήσης  
 Phone numbers which are not transferred in the usual format: (e. g. +445306… or 00445306…) are converted into this format.
 
 
Προβολή αριθμού κλήσης (εξερχόμενης)
You need to input the following information to ensure that the telephone transfers the data (e.g. the called phone number, its own phone number) to the provider in the correct format:
Μορφή του καλούμενου αριθμού κλήσης   : Format, in which the provider requires the phone number of the called party number to transfer the call.
Note: The telephone automatically converts called phone numbers into this format when it makes calls via the provider. If you dial a number without a prefix, the local area code therefore applies (Ρυθμίσεις > Λογαριασμοί > Κωδικός χώρας και περιοχής).
Με κωδικό χώρας και περιοχής (0044 5306): The called phone number is sent to the provider along with its entire country code (e.g. 0044).
Με κωδικό χώρας και περιοχής (+44 5306): The called phone number is sent to the provider with a plus sign (+) and the entire country code (e.g. +44).
Με κωδικό χώρας και περιοχής (44 5306): The called phone number is sent to the provider with a shortened country code (without international prefix (number), e.g. 44).
Με κωδικό περιοχής (05306): The called phone number is sent to the provider without a country code.
Unchanged (as dialled): The called phone number is sent to the provider unchanged.
Μορφή του δικού σας αριθμού κλήσης  : Format in which your own phone number, that is to be transmitted, is to be supplied to the provider.
Note: Your own phone number is automatically converted into the selected format. If you have entered your own phone numbers in the telephone without prefixes, the local area code applies to them during conversion (Ρυθμίσεις > Λογαριασμοί > Κωδικός χώρας και περιοχής).
Με κωδικό χώρας και περιοχής (0044 5306): Your own phone number is sent to the provider along with its entire country code (e.g. 0044).
Με κωδικό χώρας και περιοχής (+44 5306): Your own phone number is sent to the provider with a plus sign (+) and the entire country code (e.g. +44).
Με κωδικό χώρας και περιοχής (44 5306): Your own phone number is sent to the provider with a shortened country code (without international prefix (number), e.g. 44).
Με κωδικό περιοχής (05306): Your own phone number is sent to the provider without a country code.
Μόνο αριθμός σύνδεσης (MSN/κύριος αριθμός κλήσης+DDI): Only your own connection number (MSN/DDI main number + DDI) is to sent to the provider.
Μόνο απευθείας επιλογή (DDI): Only your own Direct Dial In (DDI) is sent to the provider.
Μέθοδος για απόκρυψη του αριθμού κλήσης   : Calling line identity restriction by the provider with or without display text.
No display text: If calling line identity restriction is enabled, no display text is sent to the called phone number by the provider
Άγνωστο: If calling line identity restriction is enabled, the display text "anonymous" is sent to the called phone number by the provider.
User Anonymous: If calling line identity restriction is enabled, the display text "user anonymous" is sent to the called phone number by the provider.
Είδος παρουσίασης αριθμού κλήσης   : Range in which the provider expects to receive phone numbers from the telephone.
In the display text: Your own external number, which is to be transmitted to the called phone number, is transferred to the provider in the "Display text" field.
Στο όνομα χρήστη: Your own external number, which is to be transmitted to the called phone number, is transferred to the provider in the "Username" field.
Κατά το RFC3325 με P-Asserted-Identity: Your own external number, which is to be transmitted to the called phone number, is transferred to the provider in the "P-Asserted-Identity" field.
Κατά το RFC3325 με P-Preferred-Identity: Your own external number, which is to be transmitted to the called phone number, is transferred to the provider in the "P-Preferred-Identity" field.
Προσαρμοσμένη: Uses user-defined settings for number presentation.
Notes: The Προσαρμοσμένη option requires additional settings:
From
Settings for setting up the "From" header.
P-Asserted-Identity
Settings for setting up the P-Asserted-Identity" header.
P-Preferred-Identity
Settings for setting up the "P-Preferred-Identity" header.
 
 
Καθορισμός είδους κλήσης μέσω ενημερωτικής ειδοποίησης 
A specific ringtone can be assigned to the different call types of a SIP account. The required information is transmitted by the SIP provider.
Requirements:
To assign a ringtone to a call, the link leading to the ringtone must be set into the alert info header.
<http://my.server.com/my_ringtone.mp3>
Subsequently, the link is evaluated in two different ways:
Note: Some providers already have fixed information for some call types.
An alert info can be entered for the following call types:
Internal calls 
Internal priority calls 
External calls 
Group calls 
Alarm calls 
Wake-up calls 
Door calls 
Silent calls 
User-defined call type (up to 5 different call types) 
Likewise, images belonging to a call can be transmitted via SIP. For this, the link to the image must be set into the call info header and the parameter "purpose" must be set on "icon".
<http://my.server.com/my_image.jpg>;purpose=icon>
This will also work for webcam images. Additionally, it can be entered in which time intervals the image shall be reloaded. For this, the parameter "refresh" is used. The entered value equals the repetition interval in milliseconds.
<http://my.server.com/my_webcam.jpg>;purpose=icon;refresh=333>
Webcams can also be used without entering a value for this parameter. After 3 and 10 seconds, the phone reloads the image. If it has changed during this time interval, subsequently, it is reloaded regularly. If this is not desired, 0 must be entered for the "refresh" parameter.
<http://my.server.com/my_webcam.jpg;purpose=icon;refresh=0>

COMfortel 1400 IP/2600 IP/3600 IP - Firmware V2.8 - Advanced Information V03 12/2020