Version 7.2 317 Mediant 500L Gateway & E-SBC
User's Manual 15. Services
<status>
<basic>open</basic>
<ep:activities>
<ep:activity>on-the-phone</ep:activity>
</ep:activities>
</status>
</tuple>
<ci:display-name>John Doe</ci:display-name>
</presence>
2. The Skype for Business Server responds to the device with a SIP 200 OK. The
message is sent with a SIP-ETag header which identifies the entity (and Expires
header set to 600 seconds), as shown in the following example:
SIP/2.0 200 OK
From: "John Doe"<sip:john.doe@sfb.example>;tag=1c537837102
To:
<sip:john.doe@sfb.example>;tag=0E4324A4B27040E4A167108D4FAD27E3
Call-ID: 1284896643279201635736@10.33.221.57
CSeq: 1 PUBLISH
Via: SIP/2.0/TLS
10.33.221.57:5061;alias;…received=10.33.221.57;ms-received
port=48093;ms-received-cid=4900
SIP-ETag: 2545777538-1-1
Expires: 600
Content-Length: 0
3. If the call lasts longer than 600 seconds, the device sends another PUBLISH message
with the same SIP-ETag value and with an Expires header value of 600 seconds. The
Skype for Business Server responds with another 200 OK, but with a new SIP-ETag
value (and Expires header set to 600 seconds). This scenario occurs for each 600-
second call interval.
4. When the call ends, the device sends a PUBLISH message to cancel the user's online
presence status (and the user's previous presence state is restored). The message is
sent with a SIP-If-Match header set to the matching entity tag (SIP-ETag) value (i.e.,
SIP-ETag value of last 200 OK) and Expires header value set to "0", as shown in the
following example:
PUBLISH sip:john.doe@sfb.example SIP/2.0
From: <sip:john.doe@sfb.example>;tag=1c1654434948
To: <sip:john.doe@sfb.example>
CSeq: 1 PUBLISH
Contact: <sip:john.doe@10.33.221.57:5061;transport=tls>
Event: presence
Expires: 0
User-Agent: sur1-vg1.ecarecenters.net/v.7.20A.001.080
SIP-If-Match: 2545777538-1-1
Content-Length: 0
The following figure shows a basic illustration of the device's integration into Microsoft
Skype for Business Presence feature for third-party endpoints.
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