Product specifications

Data Sheet
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Voice features
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Call forwarding: no answer/busy/unconditional
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Support for 2 simultaneous calls
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SIP TLS
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Call transfer
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Call waiting/hold/retrieval
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Three-way conferencing
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Caller ID number and name (primary line and on call waiting)
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Caller ID block (prevents sending out the caller ID)
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Anonymous call blocking
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Distinctive ringing
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Do not disturb setting
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Repeat dialing on busy
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Call return
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Emergency call support
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Dial plan
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Speed dial
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Auto-attendant
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Meet-me conference
Voice port interfaces Support FXS and FXO (relay)
Fax and modem
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Fax and modem pass-through: Allows fax and modem traffic to pass through a voice port.
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Fax relay: Provides a more robust protocol for fax transmission over packet networks. Also supports the T.38
fax protocol.
Table 4. Wireless Features of the Cisco SRP 500 Series
Feature Description
WLAN hardware
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Wi-Fi 802.11b/g/n
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WPA and WPA2
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Wi-Fi Multimedia (WMM)
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Default antenna gain: 2.2 dBi
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WPS button
WLAN security features
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802.11i
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WPA and Advanced Encryption Standard (AES) (WPA2)
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Static and dynamic WEP
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Temporal Key Integrity Protocol/Simple Security Network (TKIP/SSN) encryption
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MAC authentication/filter
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Configurable RADIUS authentication for wireless clients
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Pre-Shared Keys (PSK)
SSIDs 4
System Specifications
Table 5 lists the system specifications for the Cisco SRP 521.
Table 5. System Specifications for the Cisco SRP 521W
Feature Description
Default DRAM 64 MB
Default flash memory 32 MB
WAN Fast Ethernet
LAN switch Managed 4-port 10/100BASE-T with autosensing MDI/MDI-X for automatic crossover
802.11b/g/n WLANs Integrated
USB 2.0 ports 1 port
LEDs Power, WAN, Wi-Fi, phone, LAN, WPS
External power supply Universal 100 to 240 VAC
Approvals and compliance Class B