If you need to integrate your SRST router with analog/T1 CAS link to Unity, then you nedd to adapt the configuration as follows:
!
call-manager-fallback
voicemail 12345
!
vm-integration
pattern direct * CGN
pattern ext-to-ext busy #FDN#2
pattern ext-to-ext no-answer #FDN#2
pattern trunk-to-ext busy #FDN#2
pattern trunk-to-ext no-answer #FDN#2
!
So you must use the configuration under the vm-integration command to enable voicemail integration with DTMF and analog mail systems. Here are a short explanation of all settings:
Pattern direct represents the fact that you press the message button
Pattern ext-to-ext is the forwarding to voicemail from an extension to another extension
Pattern trunk-to-ext represents the forwarding to voicemail from an external trunk to an extension
When configuring the pattern direct, pattern ext-to-ext and pattern trunk-to-ext, you must also specify combinations of alphanumeric strings (fewer than 4 digits in length) as well the calling number (CGN), called number (CDN) or forwarding number (FDN) to be sent to the voicemail system.
Then imagine the following scenario : Phone 1 ( DN 1001) is calling Phone 2 (DN 1002) which is set up to forward all busy and no-answer calls to the VM
We have then 1001 is the CGN, 1002 is the FDN and the voicemail system is the CDN. In other words, the calling number (CGN) is the number of the call originator, the frowarding number is the number of the extenson which is forwarding the call to the voicemail.So let’s take back our previous example and see what the configuration looks like:
!
pattern ext-to-ext busy #FDN#2
!
will represent to dial the number 123456789 (VM system) and send to the VM the following string in DTMF #1002#2 which must route the call correctly to the right user mailbox.
If we want to have SRST on MGCP gateways, ensure that you have the two following commands:
!
service alternate
call-manager fallback-mgcp
!
This will ensure that the MGCP gateway can provide Call Processing with SRST. Don’t forget also to have an H323 config to take over in SRST as MGCP hasn’t any Call Control.
Survivable Remote Site Telephony (SRST) is a feature which ensures that IP Phones can continue to function even if they are unable to communicate with Call Manager. During a failure, Cisco IP Phones register with the local SRST router which provides Call Processing and Control.
With the Connection Monitor Duration, Cisco IP Phones do not fail back immediately to ensure that the Call Manager in question is back online and is stable.
Here is also another presentation of Cisco SRST ( Cisco video)
A dialing domain is a group of Unity servers that share the same directory and do not require subscribers to use any type of prefix when performing transfers and sending messages between the servers (Extension must be unique within the dialing domain).
Unity can also integrate with other differents types of voice mail systems and is referred to as Unity networking.There are two overall categories of Unity networking:
Networking with other Unity systems : This can be implemented using digital networking, SMTP networking or Voice Profile for Internet Mail (VPIMv2) networking depending on Unity version and specifications.
Networking with traditional/Non-Unity Systems : This can be implemented using a bridge networking, an Audio Messaging Interchange Specifications (AMIS) networking or a VPIM networking.
The specific methods of networking Unity can be described as follows:
Digital networking : This type of networking can be used to integrate Unity systems that share the same directory.
SMTP networking : This can be used to integrate Unity systems that do not share a directory, but that are connected via IP.
VPIM networking : This allows integrations of Unity with either other Unity systems or Non-Unity systems over an IP network such as the Internet. In this case of Unity-Unity Systems integration , it is obvious that the whole set can not share the same directory (AD forest).
Bridge networking : This can be used to integrate Unity with an Octel voice mail system and requires the use of a Bridge server.
AMIS networking : This allows Unity to integrate with Non-Unity systems over analog lines.
Take in mind that VPIM is a standard which is used by messaging systems to communicate messages over the Internet or other IP networks.
VPIM is based on the SMTP and Multipurpose Internet Mail Extension (MIMI) protocols. Because SMTP transport is used with VPIM, it is essential that the Exchange server used by a local Unity server, must be able to exchange email with the email system that the remote voice mail system is using.
When voice messages are sent using VPIM, they are typically converted into G726 (for Non-Unity systems) .For fax messages , they are encoded using a TIFF-F format.
Before messages can be sent between VPIM systems, they must be encoded as MIME messages, and with Unity this task is handled by the component called the Cisco Unity Voice Connector for Exchange (referred as Internet Voice Connector (IVC)). The IVC is also responsible for handling incoming VPIM messages in conjunction with the component called the VPIM Transport Event Sink.
Don’t forget also before to configure VPIM networking on Unity that you must complete several preliminary tasks as:
Extending the AD schema
Installing the IVC
Extending the AD schema is also a mandatory step to perform for Bridge networking.
Unity can be enhanced to provide voice mail, mail, fax , text-to-speech, and so on. So in order for Unity to provide a full UM integration , Unity must be interfaced with several elements including a directory , a mail store, IIS and SQL server.
So with all theses , there are 2 types of possible integrations:
If the mail store is provided by Microsoft Exchange, Unity also integrates with Microsoft Active Directory (AD). Then it is required that Unity makes a schema extension to the AD domain, this extension will make grow the AD by up to 10 percent.Here are the Unity extensions:
User
Group
Contact
Unity location (this class is created)
An alternative to using Microsoft Exchange as the message store, you can use also Lotus Notes. When Lotus Notes is used as message store, it is required also to implement the module called Domino Unified Communication Service (DUCS).
Recent Comments