AudioCodes MediaPack MP-124 User Manual

Version 6.2 315 February 2011
SIP User's Manual 9. VoIP Networking Capabilities
9.6 Simple Network Time Protocol Support
The Simple Network Time Protocol (SNTP) client functionality generates requests and
reacts to the resulting responses using the NTP version 3 protocol definitions (according to
RFC 1305). Through these requests and responses, the NTP client synchronizes the
system time to a time source within the network, thereby eliminating any potential issues
should the local system clock 'drift' during operation. By synchronizing time to a network
time source, traffic handling, maintenance, and debugging become simplified for the
network administrator.
The NTP client follows a simple process in managing system time: the NTP client requests
an NTP update, receives an NTP response, and then updates the local system clock based
on a configured NTP server within the network.
The client requests a time update from a specified NTP server at a specified update
interval. In most situations, this update interval is every 24 hours based on when the
system was restarted. The NTP server identity (as an IP address) and the update interval
are user-defined (using the ini file parameters NTPServerIP and NTPUpdateInterval
respectively), or an SNMP MIB object (refer to the Product Reference Manual).
When the client receives a response to its request from the identified NTP server, it must
be interpreted based on time zone or location offset that the system is to a standard point
of reference called the Universal Time Coordinate (UTC). The time offset that the NTP
client uses is configurable using the ini file parameter NTPServerUTCOffset, or via an
SNMP MIB object (refer to the Product Reference Manual).
If required, the clock update is performed by the client as the final step of the update
process. The update is performed in such a way as to be transparent to the end users. For
instance, the response of the server may indicate that the clock is running too fast on the
client. The client slowly robs bits from the clock counter to update the clock to the correct
time. If the clock is running too slow, then in an effort to catch the clock up, bits are added
to the counter, causing the clock to update quicker and catch up to the correct time. The
advantage of this method is that it does not introduce any disparity in the system time that
is noticeable to an end user or that could corrupt call timeouts and timestamps.

AudioCodes MediaPack MP-124 Specifications

General

Model	MediaPack MP-124
Category	Gateway
Protocols	SIP, H.323, MGCP
Voice Codecs	G.711, G.723.1, G.726, G.729A/B
Fax Support	T.38
Management	SNMP
Security	TLS/SRTP
Power Supply	100-240 VAC, 50/60 Hz
Operating Temperature	0°C to 40°C (32°F to 104°F)
Storage Temperature	-25 to 70°C
Humidity	10% to 90%, non-condensing
Analog Ports	24 FXS

Summary

Overview

Gateway Description

Provides an overview of MediaPack series analog Voice-over-IP (VoIP) media gateways.

MediaPack Features

Details the supported features of the MP-11x and MP-124 devices.

SIP Overview

Explains the Session Initiation Protocol (SIP) as an application-layer control protocol.

Configuration Tools

Web-Based Management

Getting Acquainted with the Web Interface

Describes the Web interface, its GUI, and basic functionality.

Accessing the Web Interface

Explains how to open and log into the device's Web interface.

Areas of the GUI

Details the main areas of the Web interface's Graphical User Interface (GUI).

Toolbar

Describes the command buttons available on the toolbar for quick access.

Navigation Tree

Explains the menu structure in the Navigation pane for accessing configuration pages.

Working with Configuration Pages

Explains how to access and work with configuration pages.

Working with Scenarios

Explains how to create custom 'menus' of configuration pages called Scenarios.

System Settings

Outlines the submenus within System Settings, including Application, Syslog, Regional, Certificates, and Management.

VoIP Settings

Outlines the submenus for configuring VoIP settings, including Network, Security, Media, Applications, Control Network, SIP Definitions, Coders, GW/IP-to-IP, and SAS.

Security

Lists page items for configuring security settings, including Firewall, 802.1x, General Security, and IPSec.

Media

Outlines submenus for configuring channel parameters and media settings.

Maintenance Tab

Outlines menus for device maintenance procedures, including Maintenance Actions and Software Update.

Software Update

Outlines upgrading device software, installing keys, and loading/saving configuration files.

Status & Diagnostics Tab

Outlines menus for monitoring device status and diagnostics, including System Status and VoIP Status.

System Status

Describes monitoring device channels, Syslog messages, hardware/software info, and IP connectivity.

VoIP Status

Outlines monitoring real-time VoIP activity like IP connectivity, call details, and call statistics.

INI File-Based Management

INI File Format

Explains the format of INI file parameters, including individual and table parameters.

Modifying an ini File

Describes how to modify an ini file to preserve current device configurations.

EMS-Based Management

Familiarizing yourself with EMS GUI

Provides a brief description of the EMS graphical user interface (GUI) areas.

Securing EMS-Device Communication

Explains configuring the IPSec protocol for secure communication between EMS and the device.

Adding the Device in EMS

Explains adding the device to the EMS after defining IPSec and configuring its IP address.

Configuring Basic SIP Parameters

Describes basic SIP control protocol parameter configuration using EMS.

Configuring Advanced IPSec/IKE Parameters

Explains optionally configuring additional IPSec and IKE entries for SNMP Managers.

Provisioning SIP SRTP Crypto Offered Suites

Details configuring offered SRTP crypto suites in the SDP.

Provisioning SIP MLPP Parameters

Explains configuring MLPP (Multi-Level Precedence and Preemption) parameters using EMS.

Configuring the Device to Operate with SNMPv3

Describes the SNMPv3 configuration process using SSH or EMS.

Resetting the Device

Details saving settings to flash memory and resetting the device.

Upgrading the Device's Software

Describes upgrading device software (cmp file) using the EMS.

Restoring Factory Default Settings

Restoring Defaults using CLI

Explains restoring factory defaults using the Command Line Interface (CLI).

Restoring Defaults using an ini File

Describes restoring factory defaults by loading an empty ini file.

Restoring Defaults using Hardware Reset Button

Explains using the hardware reset pinhole button to reset settings.

Auxiliary Configuration Files

Call Progress Tones File

Describes the Call Progress Tones (CPT) and Distinctive Ringing auxiliary file.

Dial Plan File

Describes the Dial Plan file for managing dialing prefixes and digit collection.

User Information File

Explains the User Information file for mapping PBX extensions to global IP numbers.

IP Telephony Capabilities

Dynamic Jitter Buffer Operation

Describes the device's dynamic jitter buffer and its configurable parameters.

Gateway and IP-to-IP

Outlines various Gateway and IP-to-IP application features.

Dialing Plan Features

Discusses dialing plan notations, digit mapping, and external dial plan files.

Manipulating Number Prefix

Describes adding prefixes to numbers using user-defined locations.

Configuring DTMF Transport Types

Details controlling how DTMF digits are transported over the IP network.

FXS and FXO Capabilities

Outlines FXS/FXO coefficient types and FXO operating modes.

Configuring Alternative Routing (Based on Connectivity and QoS)

Explains enabling reliable routing of Tel-to-IP calls when a Proxy is not used.

Fax and Modem Capabilities

Outlines fax and modem operating modes, transport modes, and V.152 support.

Working with Supplementary Services

Lists supplementary services supported by the device.

SIP Call Routing Examples

Provides examples of SIP call flow and routing.

Stand-Alone Survivability (SAS) Application

Explains the Stand-Alone Survivability (SAS) feature.

SAS Operating Modes

Outlines the main modes for the SAS application: Outbound Proxy and Redundant Proxy.

SAS Routing

Provides flowcharts describing the routing logic for SAS in normal and emergency states.

SAS Configuration

Provides step-by-step procedures on configuring the SAS application.

General SAS Configuration

Describes general configuration required for the SAS application, applicable to all modes.

Configuring SAS Outbound Mode

Explains configuring SAS outbound mode settings.

Configuring SAS Redundant Mode

Describes configuring the SAS redundant mode.

Configuring Gateway Application with SAS

Explains the configuration required to run both Gateway and SAS applications.

Advanced SAS Configuration

Covers advanced SAS features, including manipulating URI, destination number, and routing rules.

Maintenance Tab

Maintenance

Describes performing various maintenance procedures.

Software Update

Outlines upgrading device software, installing keys, and loading/saving configuration files.

Loading Auxiliary Files

Explains loading various auxiliary files like INI, Call Progress Tones, and Dial Plan.

Loading Software Upgrade Key

Details loading a new Software Upgrade Key to determine features and capabilities.

Software Upgrade Wizard

Explains upgrading device firmware and loading ini/auxiliary files using the wizard.

Backing Up and Loading Configuration File

Details saving and loading the device's configuration settings as an ini file.

Status & Diagnostics Tab

System Status

Describes monitoring device channels, Syslog messages, hardware/software info, and IP connectivity.

VoIP Status

Outlines monitoring real-time VoIP activity like IP connectivity, call details, and call statistics.

Viewing Active IP Interfaces

Displays the device's active IP interfaces configured in the Multiple Interface Table.

Viewing Performance Statistics

Provides read-only device performance statistics, refreshed every 60 seconds.

Viewing Call Counters

Details IP to Tel and Tel to IP call counters with statistical information.

Viewing SAS/SBC Registered Users

Displays a list of registered SAS users recorded in the device's database.

Viewing Call Routing Status

Provides information on the current routing method used by the device.

Viewing Registration Status

Shows whether the device, endpoints, SIP Accounts, and BRI endpoints are registered.

Viewing IP Connectivity

Displays diagnostic connectivity information on all destination IP addresses.

VoIP Networking Capabilities

Ethernet Interface Configuration

Explains configuring the device's Ethernet connection in Manual or Auto-Negotiation modes.

NAT (Network Address Translation) Support

Describes Network Address Translation (NAT) and its advantages for private networks.

IP Multicasting

Describes the device's support for IP Multicasting according to RFC 2236.

Robust Receipt of Media Streams

Explains filtering unwanted RTP streams and selecting the correct stream.

Multiple Routers Support

Describes how the device learns network topology by responding to ICMP redirections.

Simple Network Time Protocol Support

Explains the Simple Network Time Protocol (SNTP) client functionality for system time synchronization.

Network Configuration

Outlines configuring multiple IP addresses with associated VLANs and static routing rules.

Multiple Network Interfaces and VLANs

Explains using Layer-2 VLANs and Layer-3 subnets for logically separated network segments.

Static Routing Table

Outlines configuring static routing rules using ini file, Web, and SNMP.

Setting Up VoIP Networking

Explains setting up VoIP networking using the Web interface or ini file.

Configuration Parameters Reference

Networking Parameters

Describes the device's networking parameters.

Ethernet Parameters

Details the Ethernet connection mode types: Manual and Auto-Negotiation.

Multiple Network Interfaces and VLAN Parameters

Describes IP network interfaces and VLAN parameters.

Static Routing Parameters

Details the static routing parameters.

Quality of Service Parameters

Explains specifying Layer-2 and Layer-3 priorities by assigning values to service classes.

NAT and STUN Parameters

Describes Network Address Translation (NAT) and Simple Traversal of UDP through NAT (STUN) parameters.

NFS Parameters

Details Network File Systems (NFS) configuration parameters.

DNS Parameters

Outlines Domain Name System (DNS) parameters.

DHCP Parameters

Describes Dynamic Host Control Protocol (DHCP) parameters.

NTP and Daylight Saving Time Parameters

Details Network Time Protocol (NTP) and daylight saving time parameters.

Web and Telnet Parameters

Describes the device's Web and Telnet parameters.

General Parameters

Details general Web and Telnet parameters, including access lists.

Web Parameters

Describes Web parameters, including disabling Web management and HTTP port.

Telnet Parameters

Details Telnet parameters for the embedded Telnet server.

Debugging and Diagnostics Parameters

Describes debugging and diagnostic parameters.

General Parameters

Details general debugging and diagnostic parameters.

Syslog, CDR and Debug Parameters

Details Syslog, CDR, and debug parameters.

Remote Alarm Indication Parameters

Describes Remote Alarm Indication (RAI) parameters.

Serial Parameters

Details RS-232 serial parameters for debugging and SMDI.

BootP Parameters

Describes BootP parameters, including retries and selective bootp.

Security Parameters

Describes the device's security parameters.

General Parameters

Details general security parameters, including voice menu password and secure startup.

HTTPS Parameters

Details Secure Hypertext Transport Protocol (HTTPS) parameters.

SRTP Parameters

Describes Secure Real-Time Transport Protocol (SRTP) parameters.

TLS Parameters

Details Transport Layer Security (TLS) parameters.

SSH Parameters

Describes Secure Shell (SSH) parameters.

IPSec Parameters

Outlines Internet Protocol security (IPSec) parameters.

OCSP Parameters

Describes Online Certificate Status Protocol (OCSP) parameters.

RADIUS Parameters

Details RADIUS parameters for authentication, authorization, and accounting.

SNMP Parameters

Outlines SNMP parameters for enabling SNMP, ports, and trusted managers.

SIP Media Realm Parameters

Describes SIP Media Realm parameters.

Control Network Parameters

Outlines configuring proxy server, registration, and authentication SIP parameters.

IP Group, Proxy, Registration and Authentication Parameters

Describes proxy server, registration, and authentication SIP parameters.

SIP Software Package

Software Package

Lists the device's standard SIP software package files and descriptions.

Selected Technical Specifications

MediaPack Technical Specifications

Lists main technical specifications of MP-11x and MP-124 devices.