User`s manual

Table Of Contents
SIP User's Manual 1. Overview
Version 5.0 23 October 2006
1.6 Features
This section provides a high-level overview of some of the many gateway supported
features.
1.6.1 General Features
Compliant with SIP (RFC 3261).
Supported coders: G.711 A-law, G.711 µ-law, G.723.1, G.726, G.729, NetCoder,
EVRC, AMR, Transparent, GSM Full-Rate, Microsoft GSM and GSM EFR.
When EVRC (Enhanced Variable Rate Codec), AMR (Adaptive Multi-Rate) and GSM
EFR are used, the number of available gateway channels is reduced (refer to the
Mediant 3000 & Mediant 2000 & TP Series SIP Digital Release Notes).
Supports negotiation of dynamic payload types.
Supports reception and DNS resolution of FQDNs received in SDP.
T.38 fax with superior performance (handling a round-trip delay of up to nine
seconds).
Echo Canceler (with up to 128 msec tail length), Jitter Buffer, Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG) support.
Silence suppression with Comfort Noise Generation.
Web management for easy configuration and installation.
EMS for comprehensive management operations (FCAPS).
Simple Network Management Protocol (SNMP) and Syslog support.
SMDI support for Voice Mail applications (Mediant 2000 only).
ThroughPacket™ proprietary feature that aggregates payloads from several channels
into a single IP packet to reduce bandwidth overhead.
Supports load balancing with proxy.
Can be integrated into a Multiple IPs and a VLAN-aware environment.
Capable of automatically updating its firmware version and configuration.
Secured Web access (HTTPS) and Telnet access using SSL / TLS.
IPSec and IKE protocols are used in conjunction to provide security for control (e.g.,
SIP) and management (e.g., SNMP and Web) protocols.
Secured RTP (SRTP) according to RFC 3711, used to encrypt RTP and RTCP
transport.
1.6.2 PSTN-to-SIP Interworking Features
The gateway performs interworking between ISDN and CAS via E1/T1/J1 digital spans and
SIP IETF signaling protocol. 16 E1, T1 or J1 spans are supported (480 channels) in a two
modules gateway.
The gateway supports various ISDN PRI protocols such as EuroISDN, North American
NI2, Lucent 4/5ESS, Nortel DMS100, Meridian 1 DMS100, Japan J1, as well as QSIG. PRI
support includes User Termination or Network Termination side. ISDN-PRI protocols can
be defined on an E1/T1 basis (i.e., different variants of PRI are allowed on different E1/T1
spans).
In addition, it supports numerous variants of CAS protocols for E1 and T1 spans, including
MFC R2, E&M wink start, E&M immediate start, E&M delay dial/start, loop-start, and
ground start. CAS protocols can be defined on an E1/T1 basis (i.e., different variants of
CAS are allowed on different E1/T1 spans).
PSTN to SIP and SIP to PSTN Called number can be optionally modified according to rules
that are defined in gateway ini file.