AudioCodes Mediant 800 User Manual page 350

CHAPTER 16 Services
2. The device uses a Call Setup Rule to perform LDAP queries on the Microsoft Active Directory
to retrieve Skype for Business usernames (Request URIs) for the corresponding calling
(source) and/or called (destination) number. For SBC calls, the Call Setup Rule is associated
with the classified source IP Group (in the IP Groups table). For Tel-to-IP Gateway calls, the
Call Setup Rule is associated with the destination IP Group (in the Tel-to-IP Routing table).
3. The device routes the call to the required destination, according to the normal routing rules.
4. When the call is connected, the device sends a SIP PUBLISH message to Skype for Business
Server, indicating that the users' presence status is now "On-the-Phone".
5. When the call ends, the device sends another SIP PUBLISH message to the Skype for
Business Server, clearing the users' "On-the-Phone" status (the presence status changes to
what it was before the call was connected).
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To configure the device for Skype for Business presence:
1. Enable the Microsoft presence feature: open the SIP Definitions General Settings page (Setup
menu > Signaling & Media tab > SIP Definitions folder > SIP Definitions General
Settings), and then from the 'Microsoft Presence Status' drop-down list, select Enable:
2. Configure a TLS Context (TLS certificate) for secured communication (mutual authentication)
between the device and the Skype for Business Server (see
Contexts).
3. Configure a Proxy Set to define the address of the Skype for Business Server (see
Proxy Sets). Make sure you configure the following:
● 'TLS Context Name': Assign the TLS Context that you configured in Step 2 (above).
● 'Proxy Address': Configure the address (FQDN or IP address).
● 'Transport Type': TLS
4. Configure an IP Group to represent the Skype for Business Server (see
Groups). Make sure that you assign it with the Proxy Set that you configured in Step 3 (above).
5. Assign the IP Group of the Skype for Business Server as the destination (presence gateway)
to where the device must send the PUBLISH messages: open the SIP Definitions General
Settings page (Setup menu > Signaling & Media tab > SIP Definitions folder > SIP
Definitions General Settings), and then in the 'Presence Publish IP Group ID' field, enter the
IP Group ID of the Skype for Business Server that you configured in Step 4 (above):
6. Configure the Skype for Business LDAP server (Active Directory) to query for the Skype for
Business users' SIP URIs (see
7. Configure Call Setup Rules to perform LDAP queries in the Microsoft Active Directory for the
SIP URI of the caller (source) and called (destination) parties (see
Rules). The device first needs to search the AD for the caller or called number of the third-party
endpoint device. For example, to search for a called mobile number, the searched LDAP
Attribute would be "mobile" set to the value of the destination number (e.g., 'mobile=+' +
param.call.dst.user). If the entry exists, the query searches for the Attribute (e.g., ipPhone)
where the SIP URI is defined for the corresponding mobile user. If found, the query returns the
Attribute's value (i.e., URI) to the device (instructed using the special 'Condition' string
"presence.dst" or "presence.src"). This is the URI that the device uses as the Request-URI in
the PUBLISH message that it sends to the Skype for Business Server. The configuration of
the example used in this step is shown below:
Mediant 800 Gateway & E-SBC | User's Manual
Configuring LDAP Servers).
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Configuring TLS Certificate
Configuring
Configuring IP
Configuring Call Setup