Cisco SRP521W-U SRP521W-U-E-K9 Fiche De Données
Codes de produits
SRP521W-U-E-K9
© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public.
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Table 3.
Voice Features of the Cisco SRP500 Series
Feature
Description
Voice gateway
●
SIP version 2 (RFC 3261)
●
SIP messages via UDP/TCP
●
Echo cancellation (G.167 and G.168)
●
Dynamic jitter buffer
●
Simple traversal of UDP through NAT (STUN) (RFC 3489)
●
SDP (RFC 2327)
●
RTP/RTCP over UDP
●
3-way conferencing
●
Dual-tone multifrequency (DTMF) tone detection and generation
●
Voice activity detection (VAD)
●
Silence suppression
●
Comfort noise generation (CNG)
●
Caller ID generation and detection (frequency shift keying [FSK] and DTMF)
●
Media loopback
●
SIP Transport Layer Security (TLS)
●
Support for 2 simultaneous voice or fax calls per port
International
Telecommunications
Union (ITU) standard
voice codecs
Telecommunications
Union (ITU) standard
voice codecs
Voice algorithms
●
G.711 (a-law and
µ
-law)
●
G.726-32
●
G.729a
Telephony interface
signaling support
signaling support
●
Ring voltage: 40 to 90 Vpk
●
Ring frequency: 20 to 25 Hz
Voice features
●
Secure calling
●
Call forwarding: no answer/busy/unconditional
●
Call transfer
●
Call waiting/hold/retrieval
●
Three-way conferencing
●
Caller ID number and name (primary line and on call waiting)
●
Caller ID block (prevents sending out the caller ID)
●
Anonymous call blocking
●
Distinctive ringing
●
Do not disturb setting
●
Repeat dialing on busy
●
Call return
●
Emergency call support
●
Dial plan
●
Speed dial
Voice port interfaces
2 FXS ports, 1 relay FXO port (SRP520 models); 4 FXS ports, 1 active FXO port (SRP540 models)
Fax and modem
●
Fax and modem pass-through
●
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)
[PCM]) (T.38 support is dependent on fax machine and network/transport resilience)