What is codec? | ZyXEL Communications 2602RL-D3A specs

Prestige 2602RL-D3A Support Notes

What is codec?

Codec is a algorithm which converts analog signal into digital signal and vice versa. There are three main type of waveform codec, source codec, and hybrid codec. Each consume different amount of bandwidth and provide different voice quality level.

What is the relation of codec and VoIP?

As VoIP is a general term send voice information in digital form in discrete packets over digital network and this digital network is public network, thus there maybe other packet such data packet uses network at the same time. The codec choose is related to how much bandwidth voice packet will consume. In bandwidthwise aspect the smaller amount of bandwidth used the better. But in voice aspect the higher quality the better.

What codec does Prestige support?

Prestige supports the following commonly used codec.

∙G.729 voice codec

∙G.711u-law voice codec

∙G.711a-law voice codec

Note: G.711 u-law or G.711 a-law is country specific, thus ZyXEL device is shipped preconfigured to use u-law or a-law according to specific country. If for special reason this setting needed to be changed. It can be modify through device CI command through telnet. For the command please refer to the CI command list in the firmware release note.

Which codec should I choose?

As which codec choose is depending on what codec is supported on both end of the VoIP host. Generally a codec with low bandwidth consumption and high voice quality is a good codec .

What do I need in order to use SIP?

The minimum required to use VoIP is as follow.

1.A high-speed Internet connection. This can be a cable modem, or a high-speed network services such as ISDN, DSL or a T-1 link. The need of the bandwidth required will depend on the amount of telephone traffic will be in your network.

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ZyXEL Communications 2602RL-D3A What is codec?, What is the relation of codec and VoIP?, What codec does Prestige support?

Contents

Version Sep Prestige 2602RL-D3A Prestige 2602RL-D3A Support Notes FAQ Pstn L Ifeline FAQ Trouble Shooting Ethernet connection Application Notes ∙ Setting up the Prestige router TCP/IP InstallationTCP/IP Configuration Prestige 2602RL-D3A Support Notes Web screen shown below takes PPPoE as the example ∙ What is Dhcp Relay? Setup the Prestige as a Dhcp Relay ∙ Setup the Prestige as a Dhcp Client Configure an Internal Server Behind SUA Edit IP Alias= No Press Enter to Confirm or ESC to Cancel Service Port Number Configure a Pptp server Behind SUA ∙ Example 1723 192.168.1.10 Prestige 2602RL-D3A Support Notes ∙ What is Multi-NAT? Using NAT / Multi-NAT Many to Many No Overload One to OneMany to One Many to Many Overload Applying NAT in the SMT Menus Following table summarizes these typesNAT Type IP Mapping Direction SUA Only Full FeatureField Options Description None Address Mapping Sets and NAT Server Sets Configuring NATTable Applying NAT in Menu 4 and Menu Prestige 2602RL-D3A Support Notes SUA Field Description Option/Example Description Option Field Following table describes the fields in this screen Enter 2 to go to Menu 15.2.1-NAT Server Setup See the following figure Internet Access Only Prestige 2602RL-D3A Support Notes Internet Access with an Internal Server Types are used Type One-to-One Start= Name= Example3 Support Non NAT Friendly Applications Type Many-to-Many No Overload Start= NAT Type IP Mapping ∙ SUA ∙ Filter Structure About Filter & Filter Examples How does ZyXEL filter work? ∙ Filter Types and SUA Prestige 2602RL-D3A Support Notes Menu Protocol and device rule cannot be active together Filter for blocking the web service Create a filter set in Menu Rule 2 for b.DNS request, TCP06/Port number Rule one for a. http packet, TCP06/Port number Rule 3 for c. DNS packet UDP17/Port number Filter for blocking a specific client Configuration Create a filter set in Menu 21, e.g., set Set to Drop to drop all the packets from this client One rule for blocking all packets from this clientEnter the client IP in this field Addr= field, for one workstation it is Detailed format of the Ethernet Version Before you Begin Configurations Action Matched= Drop Action Not Matched= Forward Value= 0080c810234a Filter for blocking the NetBIOS packets Action Not Matched= Check Next Rule Prestige 2602RL-D3A Support Notes Prestige 2602RL-D3A Support Notes Menu 21.1.6 TCP/IP Filter Rule Filter # 1,6 Prestige 2602RL-D3A Support Notes Prestige 2602RL-D3A Support Notes Menu 3.1 General Ethernet Setup Input Filter Sets Using the Dynamic DNS Ddns Key Settings for using Ddns function Network Management Using Snmp Password Enable Wildcard Writes ∙ Trap ∙ Get∙ GetNext ∙ Set ZyXEL Snmp Implementation ∙ warmStart defined in RFC-1215 Configure the Prestige for Snmp Using syslog ∙ Unix Setup ∙ Filter log L02 Call Terminated C02 Call Terminated Example∙ Packet triggered log Format SdcmdSyslogSend SYSLOGPPPLOG, SYSLOGNOTICE, String ∙ PPP Log ∙ What is IP Alias ? Using IP Alias Dhcp Setup TCP/IP Setup IP Alias Using Call Scheduling Select a Schedule Set number and give it a name Edit the Schedule sets in menu Menu 26.1 Schedule Set Setup is as follows Start Date How Often Forced On Forced Down Enable ∙ Time Service in Prestige ∙ IP Multicast Setup Enable Igmp in Prestiges LAN in menu Using IP Multicast Multicast Enable Igmp in Prestiges remote node in menu Traffic Redirect on LAN port Using Prestige traffic redirectYou can deploy the backup gateway on LAN of Prestige SMT Menu 2 WAN Backup Setup WAN IP ∙ 1. What is UPnP Using Universal Plug n Play UPnP UPnP Operations Enable UPnP function in ZyXEL device ∙ 2. Using UPnP in ZyXEL devices Changes through UPnP Prestige 2602RL-D3A Support Notes Finally, your video conversation is achieved Usage of Pstn Lifeline Pstn Lifeline Application Notes Relay to Pstn Lifeline configuration How to connect Lifeline and DSL connection VoIP Application Notes Setup SIP Account To configure Port AccountNumber Local Phone port settings PasswordSetup Reset Speaking Setting to take effectVolume Function menu Dialing Advanced voice settings configurationActive Support SIP Account Each fields detail description of the page is listed below Expiration TimerDtmf Mode URL Type Time MessageWaiting Indication Each fields detail description of the page is listed below Type Speed DialSIP Number Name Immediate Voice Common SettingsSettings Region Voice QoS setup Call Service ModeServices from your voice service provider Voice Vlan Call Forwarding setupPriority No Answer Forward to Number Unconditional Forward to NumberBusy Forward to Number Busy Forward Table NumberForward to Unconditional Condition Number Setup sectionCall Hold setup Call Waiting setup Scenario Three Way Conference setup Step Hang up the phone to drop the connection StepStep Dial B phone number directly to make another call Conversation Dial to B Off hook B conversation Call Transfer setup Application scenario 2 Consult On Hold Transfer To active Blind Transfer please follow the below step Application scenario 3 Attendant Transfer Call Park / Call Pickup To active Attendant Transfer please follow the below stepInternal Call Step Then a hang up the phone SystemCall Park Call Flow Call Pickup Call Flow Call Return Each filed is described in the following table Distinctive Ringing Do Not Disturb DND How to configure DND on phone keypad? Hot Line Auto Dial On phone keypad, it will implement this feature Music on hold MWI Early Media Country Code How do I access the embedded web configurator? What is ZyNOS? How do I upload or backup Romfile via web configurator? What is SUA? When should I use SUA? Why cant I make Telnet to Prestige from WAN?What should I do if I forget the system password? What are Device filters and Protocol filters? What is the difference between NAT and SUA?Why cant I configure device filters or protocol filters? How many network users can the SUA/NAT support? What do I need to use the Prestige? What is the Prestige Integrated Access Device?What is PPPoE? Will the Prestige work with my Internet connection? Does the Prestige support PPPoE? How do I know I am using PPPoE?Why does my provider use PPPoE? How can I configure the Prestige? What Dhcp capability does the Prestige support? Does Prestige support dynamic IP addressing?How does e-mail work through the Prestige? How fast can the data go? Default IP address is 192.168.1.1, PasswordHow does the Prestige support TFTP? Can the Prestige support Tftp over WAN? When do I need Multi-NAT? What is Multi-NAT? Server What IP/Port mapping does Multi-NAT support? What is BOOTP/DHCP? What is the difference between SUA and Multi-NAT? What is DDNS? When do I need Ddns service? Do I need Lifeline? What does Lifeline mean? Can I receive incoming Pstn call through P2602RL- D3A? What is Voice over IP?Why use VoIP? Can I connect more than one phone on the phone port? What advantage does Voice over IP can provide? What is the relationship between codec and VoIP?What is the difference between H.323 and SIP? What is voice quality? Which codec should I choose? What is codec?What is the relation of codec and VoIP? What codec does Prestige support? Can register but can not establish a call? Unable to register with the SIP server? What makes Prestige firewall secure? What is a network firewall? What kind of firewall is the Prestige? What are the basic types of firewalls? What is SYN Flood attack? What is Denials of Service DoSattack?What is Ping of Death attack? What is Teardrop attack? What are the default ACL firewall rules in Prestige? What is Land attack?What is Brute-force attack? What is IP Spoofing attack? How can I protect against IP spoofing attacks? Can I override block or allow certain URLs by wording? Content Filter FAQ Example Online Trace TCP RAW Data 0000 80 C8 4C EA A0-C5 0010 = 0xE8ED 238 Protocol Prestige 2602RL-D3A Support Notes Total Length Idetification Trace LAN packet Trace WAN packet Offline Trace 160 RAW Data Prestige 2602RL-D3A Support Notes 163 TCP/IP Debug PPPoE Connection Example- a trace with system crashes E5bdc000 LAN/WAN Packet Trace Example TCP Urgent Ptr Options 0000 02 05 B4 01 01 172 Example Ras sys trcd parse Be 2F FE EF D0 CLI Command List