11.6.1. Survivability Unit for AP Emergency 
The survivability unit integrates a control processor in an access
point. A maximum of 83 survivability units can be integrated in the system
with the maximum 83 access points per system.
The survivability unit processor requires 2 LAN connections in the
IP network.
Detailed information can be found in “Section 2 - System Components
(Harwdare & Software) > OpenScape 4000 in the Customer LAN >
AP 3700 IP/OpenScape 4000 SoftGate with Survivability Unit in the Customer
LAN”.
An “IPDA“ interface is required for the signaling connection with
the allocated access points.
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PHY
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10/100 Base T - autosensing or can be permanently
set
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MAC address
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Permanently programmed ->sticker
(the
higher of the two addresses)
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IP address
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Configured in the OpenScape 4000 system, can
be set
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IEEE 802.1 p/q VLAN tagging
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Configurable; priority bits are always set when
active. See Table
3 “TOS values” in document “Gateways HG 3500 and HG
3575”.
The VLAN ID can be set. Configuration in the OpenScape
4000 system.
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TOS/DiffServ
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The six highest bits in the TOS byte can be
set. See Table
3 “TOS values” in document “Gateways HG 3500 and HG
3575”. Configuration in the OpenScape 4000 system.
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Protocols/ports
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See Chapter
20, “IP Ports” in the document “Gateways HG 3500 and
HG 3575”.
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Routing
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The default host route, which is configured
for HG 3575 in the same shelf, is used for the access point.
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Firewall
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The central processor only allows connections
to addresses that it knows, i.e. access points or assigned service PCs.
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Number of connections
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Up to 83 TCP/IP connections (one per allocated
access point)
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An additional “CUSTOMER“ interface is required for remote access
by OpenScape 4000 Manager and for accessing the file server, which distributes
OpenScape 4000 central system software and data.
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PHY
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10/100 Base T - autosensing
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MAC address
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Permanently programmed on the board, ->sticker
(lower of the two addresses)
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IP address
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Can be configured in the OpenScape 4000 Assistant
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Routing
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Configurable
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Number of connections
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TCP/IP connection to file server if required.
Administration
via OpenScape 4000 Assistant
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Security
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The same as for OpenScape 4000 Assisatnt
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