Freepbx 2.5 and Exchange 2010 MWI

General Help
1

I have intergrated Exchange 2010 with Asterisk 1.6 / Freepbx 2.5. Everything works without issue, except MWI. I have certain extensions using Asterisk for VM and the rest is getting forwarded to Exchange. I’m posting the code below incase it will help anyone else.

My actual question is; does anyone else have Exhange 2010 working with MWI?

Add to: /etc/asterisk/extensions_override_freepbx.conf
[macro-exten-vm]
exten => s,18,GotoIf($["${EXTTOCALL}"=“10”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“11”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“12”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“13”]?100)

exten => s,n,NoOp(Call Sent to Microsoft Exchange VM)
exten => s,n,SIPAddHeader(Diversion: ;reason=no-answer;screen=no;privacy=off)
exten => s,n,Dial(SIP/998::::[email protected])
exten => s,100,NoOp(Call Sent to Asterisk VM)
exten => s,101,Macro(vm,${VMBOX},${DIALSTATUS},${IVR_RETVM})

2

Hi,

could you please send me the configuration how you had connected asterisk to exchange 2010? i get everytime the following error, when i try to make a call to exchange:

[Dec 14 13:36:50] WARNING[26987]: chan_sip.c:16925 handle_response_invite: Received response: “Forbidden” from ‘“Robert Arbeit” sip:[email protected];tag=as1ad80f5b’

i have running Asterisk 1.6.1.11

Regards
Robert

3

I am fairly sure you need Asterisk 1.6.2 for the MWI to work.

https://issues.asterisk.org/view.php?id=13028

For my Exchange 2007 UM integration I use the following in sip_general_custom.conf

tcpbindaddr = 0.0.0.0
tcpenable = yes
promiscredir = yes

These settings my SIP trunk in FreePBX

type=peer
host=10.9.1.13
transport=tcp
qualify=yes

And the below to override the macro-vm in extensions_override_freepbx.conf

[macro-vm]
; ARG1 - extension
; ARG2 - DIRECTDIAL/BUSY
; ARG3 - RETURN makes macro return, otherwise hangup
exten => s,1,Macro(user-callerid,SKIPTTL)
exten => s,2,GotoIf($["${ARG2}" = “DIRECTDIAL”]?4)
exten => s,3,SIPAddHeader(Diversion: tel:${ARG1};reason=no-answer;screen=no;privacy=off)
exten => s,4,Dial(SIP/exchange-vm)
exten => s,5,Hangup

Also if using a version of Asterisk above 1.6.1.7-rc1 DTMF tones probably won’t work with Exchange.

https://issues.asterisk.org/view.php?id=16292

You can apply my patch asterisk-1.6.1.11-constantssrc.patch and add constantssrc = yes to sip_general_custom.conf.

4

jeffreywfinch,

One part of your post intrigues me…

“I have certain extensions using Asterisk for VM and the rest is getting forwarded to Exchange.” I have everything working, but ALL voicemails are going to Exchange. How did you make it work for just selective voicemails?

5

Use the code below and in the line #exten => s,n,GotoIf($["${EXTTOCALL}"=“10”]?100)# extention 10 will bypass Exchange. If you want to bypass extension 222 you would use #exten => s,n,GotoIf($["${EXTTOCALL}"=“222”]?100)#. I’m currently bypassing 10-13 in the below example. Hope this helps. If you get the WMI working for Exchange 2010 let me know…

[macro-exten-vm]
include => macro-exten-vm-custom
exten => s,1,Macro(user-callerid,)
exten => s,n,Set(RingGroupMethod=none)
exten => s,n,Set(VMBOX=${ARG1})
exten => s,n,Set(__EXTTOCALL=${ARG2})
exten => s,n,Set(CFUEXT=${DB(CFU/${EXTTOCALL})})
exten => s,n,Set(CFBEXT=${DB(CFB/${EXTTOCALL})})
exten => s,n,Set(RT=${IF($[$["${VMBOX}"!=“novm”] | $["${CFUEXT}"!=""]]?${RINGTIMER}:"")})
exten => s,n(checkrecord),Macro(record-enable,${EXTTOCALL},IN)
exten => s,n(macrodial),Macro(dial-one,${RT},${DIAL_OPTIONS},${EXTTOCALL})
exten => s,n,GotoIf($["${VMBOX}"!=“novm” & “${SCREEN}”!="" & “${DIALSTATUS}”=“NOANSWER”]?exit,return)
exten => s,n,Set(SV_DIALSTATUS=${DIALSTATUS})
exten => s,n(calldocfu),GosubIf($["${SV_DIALSTATUS}"=“NOANSWER” & “${CFUEXT}”!="" & “${SCREEN}”=""]?$
exten => s,n(calldocfb),GosubIf($["${SV_DIALSTATUS}"=“BUSY” & “${CFBEXT}”!=""]?docfb,1)
exten => s,n,Set(DIALSTATUS=${SV_DIALSTATUS})
exten => s,n,Noop(Voicemail is ‘${VMBOX}’)
exten => s,n,GotoIf($["${VMBOX}"=“novm”]?s-${DIALSTATUS},1)
exten => s,n,Noop(Sending to Voicemail box ${EXTTOCALL})

exten => s,n,GotoIf($["${EXTTOCALL}"=“10”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“11”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“12”]?100)
exten => s,n,GotoIf($["${EXTTOCALL}"=“13”]?100)

exten => s,n,NoOp(Call Sent to Microsoft Exchange VM)
exten => s,n,SIPAddHeader(Diversion: tel:${EXTTOCALL};reason=no-answer;screen=no;privacy=off)
exten => s,n,Dial(SIP/998::::[email protected])
exten => s,n,Macro(hangupcall)

exten => s,100,NoOp(Call Sent to Asterisk VM)
exten => s,101,Macro(vm,${VMBOX},${DIALSTATUS},${IVR_RETVM})

6

Asterisk MWI works with Exchange 2010 if you use the patch provided in https://issues.asterisk.org/jira/browse/18762

7

jeffreywfinch, thank you for your code.

I have Asterisk hooked up to Exchange so I can leverage the Exchange auto-attendant, have email and calendar read via phone, etc. I’m wondering though if it’s worth it to store the voicemails on Exchange. Here are the pros and cons that I can think of:

PRO of storing VM on Exchange 2010

  • Exchange will transcribe the voicemail as part of the email.
  • If you delete the emailed voicemail attachment, it deletes the voicemail on the system.

CONS

  • No web interface for the user.
  • Less of an ability to record alternate greetings?
  • Harder to set-up *97 to call voicemail

For the people that have done this or thinking of doing this, do you think you gain that much by having Exchange be the voicemail system?

8

Exchange UM is pretty cool but the licensing cost for my organization was outrageously high. I am currently looking at using FreePBX Vocemail with IMAP storage and using Exchange as the IMAP server.

9

I’ve been using Exchange 2010 since it was released. I would like to give another perspective on your CONS.

  1. From a pricing perspective, all you need for UM is an Enterprise CAL instead of a Standard. The cost difference is small and most medium to large organizations already need an enterprise call for other reasons.

http://www.microsoft.com/exchange/en-us/licensing-exchange-server-email.aspx#Exchange2010CAL

  1. For a web interface you can use OWA, which gives a feature rich GUI to configure all you UM features. You can simply configure many different option for call routing and custom recordings.

http://www.microsoft.com/exchange/en-us/outlook-web-app.aspx

  1. I’m not sure whats hard about the *97. If you having issues I can probably explain how I set it up.

PRO

  1. One really cool feature you didn’t mention is the voice control when you enter your voice-mail account. You can have it read email, reschedule meeting, assign tasks.

http://www.microsoft.com/exchange/en-us/unified-messaging.aspx

10

I agree that the Exchange UM is feature rich.

I am surprised to hear you say that the cost difference is small for an Enterprise CAL. From what I understand, you actually need a standard and an Enterprise CAL to achieve UM. Our price was high and it was recurring every year.

11

brendanh - We have the Enterprise CAL (no need to buy both), and it’s a one time purchase. Unless you buy “software assurance” it’s not a recurring fee.

jeffreywinch - thanks for the info. I have Asterisk connected with UM for Outlook Web Access, but I was trying to figure out if I should also use Exchange for the voicemail functionality. Based on your response, I will. Also, can you tell me how you set-up *97 to access the Exchange VM? I have some users that will still use Asterisk VM because they don’t have an exchange 2010 account. Thanks.

12

I used 998 and 999 for my two pilot points in Exchange.

Create a TRUNK to Exchange:
Trunk Name: TRK-MSX
Peer Details:
type=peer
host=192.168.0.58
qualify=yes
transport=tcp
context=from-internal
canreinvite=no
nat=no
insecure=very

Feature Code
Disable *97 and *98

Create Outbound Route and Place it first in Route Order
Trunk Name: OUT-MSX
Create 4 separate dial patterns

  1. Match Pattern: 998
  2. Match Pattern: 999
  3. Prepend: 998 Prefix: *97
  4. Prepend: 999 Prefix: *98
    Trunk Sequence: TRK-MSX

Create Two Misc Destination so you can use these in an IVR
MSX Attendant 999
MSX VoiceMail 998

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