Bruno Rangel
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Intercom in CME

VERSION 2                  Click to view document history

Introdução

Para criar um intercon é necessario atribuir uma linha em cada um dos dois telefones para operar como uma linha/botão de Intercom.

Pressionando o botão que foi atribuido para Intercom seleciona-se a linha e aciona a função de discagem automática para o segundo telefone. O telefone receptor recebe a chamada de intercom em sua linha previamente atribuida,essa linha auto-atende à chamada e ativa o telefone no modo viva-voz e aciona um beep e também força o viva-voz em mute para proteger a privacidade do destinatário de intercom.O caminho de áudio é aberto a partir do iniciador da chamada para o receptor.

Para atender à chamada de intercom, o destinatário simplesmente pressiona a tecla mute para ativar o caminho de áudio para o remetente/originador.

Prerequisitos

• Cisco Unified CME 7.1 ou superior.

Configuração

1. SCCP: Configurando um Intercom com Auto-Atendimento (Auto-Answer Line)

An  intercom line is a dedicated two-way audio path between two phones.  Cisco Unified CME supports intercom functionality for one-way and  press-to-answer voice connections using a dedicated pair of intercom  directory numbers on two phones that speed-dial each other.

When  an intercom speed dial button is pressed, a call is speed-dialed to the  directory that is the other half of the dedicated pair. The called  phone automatically answers the call in speakerphone mode with mute  activated, providing a one-way voice path from the initiator to the  recipient. A beep is sounded when the call is auto-answered to alert the  recipient to the incoming call. To respond to the intercom call and  open a two-way voice path, the recipient deactivates the mute function  by pressing the Mute button or, on phones such as the Cisco Unified IP  Phone 7910, lifting the handset.

In  Cisco CME 3.2.1 and later versions, you can deactivate the speaker-mute  function on intercom calls. For example, if phone user 1 makes an  intercom call to phone user 2, both users hear each other on connection  when no-mute is configured. The benefit is that people who receive  intercom calls can be heard without them having to disable the mute  function. The disadvantage is that nearby background sounds and  conversations can be heard the moment a person receives an intercom  call, regardless of whether they are ready to take a call or not.

To  enable a two-way audio path between two phones, perform the following  steps for each Cisco Unified SCCP IP phone at both ends of the two-way  voice path.

Restrictions

•     Intercom lines cannot be dual-line.

•     If a directory number is configured for intercom operation, it can be associated with only one Cisco Unified IP phone.

•     Each phone, at both ends of the two-way voice path, requires a separate configuration.

STEPS

1.          enable

2.          configure terminal

3.          ephone-dn dn-tag

4.          number number

5.          name name

6.          intercom extension-number [[barge-in [no-mute] | no-auto-answer | no-mute] [label label]] | label label]

7.          exit

8.          ephone phone-tag

9.          button button-number:dn-tag [[button-number:dn-tag] ...]

10.        end

2. SCCP: Configuring Whisper Intercom

Whisper intercom significa que apenas um caminho de áudio (one-way) existe a partir do chamador para o interlocutor. O interlocutor deve pressionar manualmente a chave/botão para falar com o chamador. Quando um usuário disca whisper intercom, o telefone chamado responde automaticamente usando o modo viva-voz, fornecendo um caminho de voz do chamador para a parte chamada, independentemente da se o número chamado estiver ocupado ou pronto.

Unlike  the standard intercom feature, this feature allows an intercom call to a  busy extension. The calling party can only be heard by the recipient.  The original caller on the receiving phone does not hear the whisper  page. The phone receiving a whisper page displays the extension and name  of the party initiating the whisper page and Cisco Unified CME plays a  zipzip tone before the called party hears the caller's voice. If the  called party wants to speak to the caller, the called party selects the  intercom line button on their phone. The lamp for intercom buttons are  colored amber to indicate one-way audio for whisper intercom and green  to indicate two-way audio for standard intercom.

You  must configure a whisper intercom directory number for each phone that  requires the Whisper Intercom feature. A whisper intercom directory  number can place calls only to another whisper intercom directory  number. Calls between a whisper intercom directory number and a standard  directory number or intercom directory number are rejected with a busy  tone.

To enable the Whisper Intercom feature on a directory number, perform the following steps.

Restrictions

•     Single-line phone models, such as the Cisco Unified IP Phone 7906 or 7911, are not supported.

•     Whisper intercom directory numbers can place calls only to other whisper intercom numbers.

•     A directory number can be configured as either a regular intercom or a whisper intercom, not both.

•     Dual-line and octo-line directory numbers are not supported as intercom lines.

•     Only one intercom call, either incoming or outgoing, is allowed on the phone at one time.

•     Call features are not supported on intercom calls.

Procedure

STEPS

1.          enable

2.           configure terminal

3.          ephone-dn dn-tag

4.           whisper-intercom [label string | speed-dial number [label string]]

5.           end

6.          show ephone-dn whisper

Example  of Whisper Intercom :

ephone-dn 21

number 1221

whisper-intercom label "finance"!

!

!

ephone  21

mac-address 02EA.EAEA.0001

button 1:21


3. Sample configuration of an intercom between two IP phones

router#show running-config

ephone-dn 1 dual-line

number 1001

name Harry Smith

!

!

ephone-dn 2 dual-line

number  1002

name Ana Smith

!

!

ephone-dn 3

number  1111

intercom 1112 label Ana

!

!

!

ephone-dn  4

number 1112

intercom 1111 label Harry

!

!

ephone  12

mac-address 000d.1234.0efc

button 1:1 2:3

!

!

ephone  15

mac-address 000d.5678.0dcf

------------------------------------------

Harry's  phone has button 1 as his primary extension line. Button  2 on Harry's phone is an intercom line. This line is set to  autodial Ana's phone using the number 1111. The button  is labeled "Ana" to show that pressing the button intercoms to Ana.

NOTE:- The intercom lines are configured in the default single-line  mode.

Ana's phone is configured to match to  Harry's phone. Button 1 on Ana's phone is her primary  line. Button 2 is set to autodial Harry's phone and  shows the label "Harry" next to  the button. The default configuration  for an intercom line is that it  autoanswers with mute for any incoming  call. Autoanswer can be disabled  if desired using the no-auto-answer  command option.Harry can intercom  to Ana, and Ana can intercom to Harry.

Individual   phones may have more than one intercom. The maximum number of  intercoms  per phone is limited only by the number of available buttons.

In   general, using intercoms on single-line phones such as the Cisco 7910,   7905, and 7912 is not recommended. These phones do not have a built-in   (hands-free) microphone and, therefore, cannot be unmuted without   lifting the phone's handset.


4. Many-to-One Intercom

This  arrangement lets you create a many-to-one intercom, which is useful  when you have a single shared assistant working for multiple executives.

Shared-Line Intercom

Intercom  lines cannot be used in shared-line configurations. If a directory  number is configured for intercom operation, it must be associated with  one IP phone only. The intercom attribute causes an IP phone line to  operate as an autodial line for outbound calls and as an  autoanswer-with-mute line for inbound calls.

Sample Configuration

router#show running-config

ephone-dn 1 dual-line

number 2101

name Executive1

!

!

ephone-dn  2 dual-line

number 2102

name Executive2

!

!

ephone-dn  3 dual-line

number 2103

name Executive3

!

!

ephone-dn  4 dual-line

number 2201

name Assistant

!

!

ephone-dn  5

number 1110

intercom 1110 label Intercom

!

!

ephone-dn  6

number 1111

intercom 1110 label Intercom

!

ephone-dn  7

number 1112

intercom 1110 label Intercom

!

!

ephone-dn  8

number 1113

intercom 1110 label Intercom

!

!

ephone  12

mac-address 000d.1234.0efc

button 1:1 2:6

!

!

ephone  13

mac-address 000d.5678.0dcf

button 1:2 2:7

!

!

ephone  14

mac-address 000d.4321.0ef7

button 1:3 2:8

!

!

ephone  15

mac-address 000d.4132.f7e4

button 1:4 2:5

---------------------------------------------

ephones   12 to 14 belong to the three executives 2101 to 2103. The fourth  phone,  ephone 15, belongs to the assistant. Each of the four phones has  its  primary line associated with button 1. The second buttons on the  three  executive phones are configured to intercom to the assistant's  intercom  line. This configuration provides a many-to-one intercom. Any  of the  executives can press the button 2 intercom on his or her phone  to talk  to the assistant. Of course, only one intercom conversation can  exist at  one time.

Note:-  that the assistant's intercom  (ephone-dn 5) is set to autodial itself.  It is not possible to create a  one-to-many intercom path. The  assistant's phone could also be  configured to autodial one of the  executives.



5. One-to-One Intercoms

You  can use this technique to configure a one-way intercom even in a simple  one-to-one intercom arrangement. A better configuration for a one-way,  one-to-one intercom is to use the noautoanswer command option.

Sample Configuration

router#show running-config

ephone-dn 1 dual-line

number 2101

name  Executive

!

!

ephone-dn 4 dual-line

number 2201

name  Assistant

!

!

ephone-dn 5

number 1110

intercom  1111 label Intercom

!

!

ephone-dn 6

number 1111

intercom  1110 label Intercom no-auto-answer

!

!

ephone 12

mac-address  000d.1234.0efc

button 1:1 2:6

!

!

ephone 15

mac-address  000d.4132.f7e4

button 1:4 2:5

With  this  arrangement, you still have a direct one-to-one dedicated line  between  the executive and the assistant. Only the assistant's phone  autoanswers  incoming calls presented to its intercom line. If the  assistant presses  the intercom line, the phone still autodials the  executive's intercom  line. The executive's phone simply rings as for a  normal call.


Related Links

Outras Referencias

http://www.cisco.com/en/US/products/ps7262/index.html