Cisco Cisco Expressway メンテナンスマニュアル
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Calls from registered systems to all other systems will use one RMS license, on the exit node, whenever those
calls require the Expressway to process the media streams. This includes, but is not limited to, the following
call types:
calls require the Expressway to process the media streams. This includes, but is not limited to, the following
call types:
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Business to business calls (previously used two RMS licenses)
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Business to consumer calls (Jabber Guest)
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Interoperability gateway calls (including Microsoft Lync / Skype for Business and third-party call control
servers where interworking is required)
servers where interworking is required)
Call Types
The Expressway distinguishes between the following types of call:
Registered: calls between locally registered endpoints (registered to Unified CM or Expressway) do not consume
licenses, as that entitlement is included within the registration.
licenses, as that entitlement is included within the registration.
The call entitlement within the registration license includes the following scenarios:
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Calls to other endpoints registered to Unified CM or Expressway within the same network when the call is
routed through a neighbor or traversal zone.
routed through a neighbor or traversal zone.
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Unified CM remote sessions: these are Mobile and Remote Access (MRA) calls i.e.video or audio calls from
devices located outside the enterprise that are routed via the Expressway firewall traversal solution to
endpoints registered to Unified CM.
devices located outside the enterprise that are routed via the Expressway firewall traversal solution to
endpoints registered to Unified CM.
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Calls to Cisco conferencing resources ( CMR, TelePresence Server/ TelePresence Conductor, or Acano
servers).
servers).
Note: These calls are still counted against the physical limit of the box.
Rich Media Sessions: these calls consume rich media session (RMS) licenses and consist of every other type of
video or audio call that is routed through the Expressway. RMS licenses are consumed on the exit node of the
Expressway in the following scenarios:
video or audio call that is routed through the Expressway. RMS licenses are consumed on the exit node of the
Expressway in the following scenarios:
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B2B
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B2BUA
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Jabber Guest
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Interworked or gatewayed calls to third-party solutions
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Interworked SIP to H.323 calls ( RMS license is consumed on the node where interworking takes place)
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Interworked IPV4 to IPV6 calls
The Expressway may take the media or just the signaling.
Audio-only SIP calls are treated distinctly from video SIP calls. Each rich media session license allows either 1 video
call or 2 audio-only SIP calls. Hence, a 100 rich media session license would allow, for example, 90 video and 20 SIP
audio-only simultaneous calls. Any other type of audio-only call will consume a rich media session license.
call or 2 audio-only SIP calls. Hence, a 100 rich media session license would allow, for example, 90 video and 20 SIP
audio-only simultaneous calls. Any other type of audio-only call will consume a rich media session license.
Note that:
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Expressway defines an "audio-only" SIP call as one that was negotiated with a single “m=” line in the SDP.
Thus, for example, if a person makes a “telephone” call but the SIP UA includes an additional m= line in the
SDP, the call will consume a video call license.
Thus, for example, if a person makes a “telephone” call but the SIP UA includes an additional m= line in the
SDP, the call will consume a video call license.
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While an "audio-only" SIP call is being established, it is treated (licensed) as a video call. It only becomes
licensed as "audio-only" when the call setup has completed. This means that if your system approaches its
maximum licensed limit, you may be unable to connect some "audio-only" calls if they are made
simultaneously.
licensed as "audio-only" when the call setup has completed. This means that if your system approaches its
maximum licensed limit, you may be unable to connect some "audio-only" calls if they are made
simultaneously.
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The Expressway does not support midcall license optimization.
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Cisco Expressway Administrator Guide
Reference Material