"Multilinearity" IP phone - why is it?
Very often, when it comes to IP phone, people are interested in the number of lines that are in the device. At the same time, the selection of the number of lines on the phone relies on who will have this same phone.
For example, a small company with a 4-line telephone is enough for the secretary of a small company, and it’s not a fact that all lines will be used if the flow of calls is not so large.
In this article I would like to consider how these lines can be used as standard, and how they can be used if there is only one registration and they are idle. For example, 2 phones, Linksys SPA 525 and Yealink SIP-T22 are used.
There is an assumption that the initial idea of ​​the lines was to register different SIP operators for each line. This is convenient when there is no PBX, and the phone connects directly to the Internet. That is, our actions are:
1) Select the desired line on the phone
2) Dial the number
3) Call through the selected line
When an incoming call, respectively, the line of the operator from which the call came.
In another case, the most common, SIP server is one (our IP-PBX), and registration is one, and buttons are needed to conveniently display the status of the held call / the ability to receive another incoming call. If the phone is 5-channel, as our SPA 525, and we rarely have more than 2 simultaneous conversations - the other buttons are idle and only spend electricity.
In the web interface, it looks like this:
')
There is a way to assign these same buttons to certain actions, since they are declared programmable.
To do this, we need to go to the web interface of the phone, switch to Admin / advanced mode and in the Phone section indicate the mode and line:
Thus, we get on, in the past, the “useless” button of the new fuctional: blf (Busy Lamp Field, or display of the busy line) and sd (Speed ​​Dial, speed dial). You can also configure cp (call pickup, i.e. when calling via special code, you can pick up the call). In order for all this to work with our Asterisk, it is still important to specify the type of server, this is done in the Att Console section. There are other servers in the list, such as broadsoft and spa9000.
I must say, on SPA 94x phones this setting is on the same page, and why it was transferred to the SPA525 in such an non-obvious place is not clear.
For special aesthetes Linksys allows you to customize the type of flashing and reaction to events.
After this setting, when talking on the number 209, the button on the phone lights up red. If the call comes to 209, the line button flashes. And if you press the button, a call to the number 209 occurs. This is especially convenient when you often have to transfer calls to the same number.
Next comes the phone brand Yealink, SIP-T22. It has 3 lines buttons, and 3 registrations.
In terms of setting, everything is much simpler, located in the Phone-DSS-Buttons of the lines menu.
The drop-down list initially amazes with its long:
Well, directly setting:
The result of this action is less beautiful, as on Linksys phones, but it performs its full functionality:
if there is no conversation - the button of the line burns constantly; If the call came to 233 - the button flashes frequently; If the conversation is active, the button flashes rarely. Well, of course, when you click on this button, a call is made to number 233.
Hopefully, this information will seem useful, and clarify the purpose of the lines, because sometimes you had to meet “wild” options when 4 different internal numbers were set up on one 4-channel telephone, which is why calls start to behave in a very strange way :)
For example, a small company with a 4-line telephone is enough for the secretary of a small company, and it’s not a fact that all lines will be used if the flow of calls is not so large.
In this article I would like to consider how these lines can be used as standard, and how they can be used if there is only one registration and they are idle. For example, 2 phones, Linksys SPA 525 and Yealink SIP-T22 are used.
Standard Lines
There is an assumption that the initial idea of ​​the lines was to register different SIP operators for each line. This is convenient when there is no PBX, and the phone connects directly to the Internet. That is, our actions are:
1) Select the desired line on the phone
2) Dial the number
3) Call through the selected line
When an incoming call, respectively, the line of the operator from which the call came.
In another case, the most common, SIP server is one (our IP-PBX), and registration is one, and buttons are needed to conveniently display the status of the held call / the ability to receive another incoming call. If the phone is 5-channel, as our SPA 525, and we rarely have more than 2 simultaneous conversations - the other buttons are idle and only spend electricity.
In the web interface, it looks like this:
')
Migrating line buttons
There is a way to assign these same buttons to certain actions, since they are declared programmable.
To do this, we need to go to the web interface of the phone, switch to Admin / advanced mode and in the Phone section indicate the mode and line:
Thus, we get on, in the past, the “useless” button of the new fuctional: blf (Busy Lamp Field, or display of the busy line) and sd (Speed ​​Dial, speed dial). You can also configure cp (call pickup, i.e. when calling via special code, you can pick up the call). In order for all this to work with our Asterisk, it is still important to specify the type of server, this is done in the Att Console section. There are other servers in the list, such as broadsoft and spa9000.
I must say, on SPA 94x phones this setting is on the same page, and why it was transferred to the SPA525 in such an non-obvious place is not clear.
For special aesthetes Linksys allows you to customize the type of flashing and reaction to events.
After this setting, when talking on the number 209, the button on the phone lights up red. If the call comes to 209, the line button flashes. And if you press the button, a call to the number 209 occurs. This is especially convenient when you often have to transfer calls to the same number.
Next comes the phone brand Yealink, SIP-T22. It has 3 lines buttons, and 3 registrations.
In terms of setting, everything is much simpler, located in the Phone-DSS-Buttons of the lines menu.
The drop-down list initially amazes with its long:
Well, directly setting:
The result of this action is less beautiful, as on Linksys phones, but it performs its full functionality:
if there is no conversation - the button of the line burns constantly; If the call came to 233 - the button flashes frequently; If the conversation is active, the button flashes rarely. Well, of course, when you click on this button, a call is made to number 233.
Conclusion
Hopefully, this information will seem useful, and clarify the purpose of the lines, because sometimes you had to meet “wild” options when 4 different internal numbers were set up on one 4-channel telephone, which is why calls start to behave in a very strange way :)
Source: https://habr.com/ru/post/140895/
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