Data Sheet
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Feature Description
Security features
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Secure connectivity
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Stateful inspection routing firewall
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Denial-of-service (DoS) prevention
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Access restriction by MAC and IP address
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NAT transparency
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Secure HTTP (HTTPS) support for remote access
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Multi-level password-protected web access for configuration
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URL and keyword filtering
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Site-to-site IPsec VPN
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Hardware-accelerated Data Encryption Standard (DES), 3DES
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5 IPsec tunnels
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VPN pass-through for IPsec, Point-to-Point Tunneling Protocol (PPTP), and L2TP
QoS features
●
Weighted Fair Queuing (WFQ) (4 queues)
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Low-Latency Queuing (LLQ)
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Traffic shaping
Provisioning,
administration, and
maintenance
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TR-069
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Automated provisioning and upgrade via Cisco XML profile, HTTP, HTTPS, TFTP
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Asynchronous notification of upgrade availability via NOTIFY
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Web browser administration and configuration via integral web server
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Event logging
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Stats in BYE message
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Syslog and debug server records
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Per-line and purpose configurable syslog and debug options
●
Simple Network Management Protocol (SNMP) versions 1 and 2 (versions 1, 2, and 3 on 540 models)
High-availability features Automatic failover and recovery of WAN connection enabled by supported USB mobile broadband modem or by second
WAN interface (540 models)
Table 3. Voice Features of the Cisco SRP500 Series
Feature Description
Voice gateway
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SIP version 2 (RFC 3216)
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Sending SIP messages via UDP/TCP
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Echo cancellation (G.167 and G.168)
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Dynamic jitter buffer
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Simple traversal of UDP through NAT (STUN) (RFC 3489)
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SDP (RFC 2327)
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RTP/RTCP over UDP/RTCP-XR (RFC 3611)
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3-way conferencing
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Remote firmware upgrade
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Dual-tone multifrequency (DTMF) tone detection and generation
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Voice activity detection (VAD)
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Silence suppression
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Comfort noise generation (CNG)
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Caller ID generation and detection (frequency shift keying [FSK] and DTMF)
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Media loopback
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SIP Transport Layer Security (TLS)
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Support for 2 simultaneous voice or fax calls
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T.38 fax relay, including V.17, V.21, V.27ter, and V.29 and fax pass-through (pulse code modulation [PCM]) (T.38
support is dependent on fax machine and network/transport resilience)
International
Telecommunications
Union (ITU) standard
voice codecs
Voice algorithms
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G.711 (a-law and µ-law)
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G.726 (16/24/32/40 kbps)
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G.729 AB
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G.723.1 (6.3 kbps, 5.3 kbps)
Telephony interface
signaling support
●
Ring voltage: 40 to 90 Vpk
●
Ring frequency: 20 to 25 Hz
Voice features
●
Call forwarding: no answer/busy/unconditional
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SIP TLS
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