External phones

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An external phone account connects an internal extension to an external number such as a mobile phone. External phones can not be added until at least one provider account was created. External phone numbers do not require the specification of outgoing patterns in the provider settings.

For adding external IP phones via VPN, please check How to connect external IP phones via VPN in the SIP_phones chapter.

General settings

The general settings allow the basic configuration of an external (mobile) phone.

  • In the number text box, the extension of the telephone is specified.
  • The caller ID is the name or number that dialog partners see on their phone displays.
  • Language sets the spoken language of the audio prompts. This setting defines which prompts are used internally. The language setting on a provider account determines the language being heard when external calls come in and overrides this settings.
  • Ring length is the period in seconds before giving up or going to voicemail. Indefinitely disables any interference by AskoziaPBX. In case notifications are not configured (see Notifications in the Services menu) but a ring length has been defined, AskoziaPBX refuses the call by signaling "unavailable" after the end of the time.
  • A description for the phone can be added. The description is ignored by AskoziaPBX but may be handy to clarify a phone's purpose, user or location.
General settings


  • For public access, check allow this number to be reached over the Internet. You can use a friendlier alias instead of the extension number. A possible form could be myName@myIP.
Security settings

Phone connectivity

For using external phones with AskoziaPBX, the provider to be used and the dialstring (external number) of the phone have to be specified. The external number does not require an outgoing pattern, even if one is configured for the desired provider account.

Connectivity settings for external phones

Call notifications and voicemail

  • If you want to receive notification e-mails for missed calls, select notify me of missed calls via e-mail. Enter the e-mail address where notifications should be sent to in the text box below.
  • To enable voicemail, select enable voicemail to e-mail and enter an e-mail address. Once enabled, all incoming voicemail messages will be sent to your e-mail account as audio files.
  • To also receive voicemails on your phone, select save voicemail to storage to access it from phone and enter a PIN. Dial 000086 and enter your PIN to listen to your voicemails or record your personal voicemail greetings.
  • You can upload your own unavailable and busy messages by browsing and upload the desired audio files. Activating Remove file deletes the corresponding file after saving your configurations.
Call notifications and voicemail

Call recording

To activate and store call recordings, storage needs to be set up first in the System settings.

AskoziaPBX offers two ways to create call recordings. Manual call recordings can be initiated by pressing *1 during a call. Automatic call recording records all calls without user intervention.

Manual call recording

Activate send me recordings via email enter a valid email address to which the recordings are send to. To record calls, simply press *1 on any other VoIP (or the record button on your Snom phone). Recordings are sent to you as a .wav file after pushing *1 again or hanging up.

Manual call recording

The following video tutorial shows how to use manual call recording.

Automatic call recording

How to automatically record all phone calls, is explained for the call recording settings in the Miscellaneous section of the Advanced menu.

Outgoing caller ID

By activating Status, and if supported by the provider, the original caller ID of the caller will be forwarded whenever an inbound call is forwarded to an external phone. If this is not desired, a fixed caller ID should be used instead, which can be defined for each providers in the input fields below.

The outgoing caller ID for each phone can be set for each provider. Leave the field blank to use the default settings of the respective provider. Use the formatting "Your Name <number>". For some providers, the country code (such as 49 for Germany) and/or area code (such as 30 for Berlin) may have to be used as prefix

Outgoing caller IDs

Advanced options

Advanced options are additional parameters not required in most cases. The following parameters are available.

  • T.38 Gateway capability should be activated if one side of a call is not capable of T.38 mode. T.38 is used to transfer faxes over data networks in real-time. In order to do so, T.38 converts the analog fax signal into an image and transfers it to a T.38 compatible device over the network. If this device is an IP phone system or a gateway, it can transform the signal back from T.38 into an analog signal and send it via PSTN (the public telephone network) to an analog fax machine. If both communicating sides are capable of T.38 mode but the gateway mode is still activated, the gateway won't interfere and allow transparent T.38 pass-through.
  • Night Switch exception makes the phone available from the outside, even when the night switch is activated.
  • Phone Book exception makes this phone unavailable in the local phone book that is provided to all auto-configured phones registered with Askozia.
  • No auto-answer disables automatic response. This can be required for one-way-audio, for example if audio for external phones isn’t working.
Advanced options

Manual dialplan incoming/outgoing

Manual dialplans can be used in different contexts but are only valid for the context that they are specified for. Therefore, the dialplan defined for an external phone is only valid within the context of this particular phone.

Manual dialplan

Blocking outgoing numbers

To block numbers, such as special service numbers, the following commands have to be entered in the Manual dialplan outgoing field of the phone. The following picture shows blocked 0800 and 0900 numbers and those, starting with 01. The commands can be modified at the marked positions for different numbers.

Blocking special service numbers

Configuring 00.+, blocks all international prefixes.

Blocking international numbers

Exception for blocked numbers

Blocked numbers in a provider account cannot be called from all internal phones via this provider. If exceptions for single phones are required, the following command has to be entered in the Manual dialplan outgoing of the desired phone account.

Exception for blocked numbers