User's Manual
Table Of Contents
- Cisco WRP500 Administration Guide
- Contents
- 1
- WRP500 Features and Benefits
- Deployment Models
- Local Area Network Guidelines
- Special Requirements for Voice Deployments
- WRP500 Maintenance Operations
- Remote Provisioning
- Configure NAT Mapping
- Configure NAT Mapping with a Static IP Address
- Step 1 Log in as administrator.
- Step 2 Under the Voice menu, click SIP.
- Step 3 In the NAT Support Parameters section, enter the following settings:
- Step 4 Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify.
- Step 5 In the NAT Settings section, enter the following settings:
- Step 6 Click Save Settings.
- Configure NAT Mapping with STUN
- Step 1 Log in as administrator.
- Step 2 Under the Voice menu, click SIP.
- Step 3 In the NAT Support Parameters section, enter the following settings:
- Step 4 Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify.
- Step 5 In the NAT Settings section, enter the following settings:
- Step 6 Click Save Settings.
- Determine Whether the Router Uses Symmetric or Asymmetric NAT
- Step 1 Make sure you do not have firewall running on your computer that could block the syslog port (port 514 by default).
- Step 2 Log in as administrator.
- Step 3 To enable debugging, complete the following tasks:
- Step 4 To collect information about the type of NAT your router is using, complete the following tasks:
- Step 5 To enable SIP signaling, complete the following task:
- Step 6 Click Submit.
- Step 7 View the syslog messages to determine whether your network uses symmetric NAT. Look for a warning header in the REGISTER messages, such as Warning: 399 spa "Full Cone NAT Detected.”
- Configure NAT Mapping with a Static IP Address
- Firewalls and SIP
- Configure SIP Timer Values
- Analog Telephone Adapter Operations
- ATA Software Features
- Register to the Service Provider
- Step 1 Log in as administrator.
- Step 2 Under the Voice menu, click Line 1 or Line 2 to choose the line interface that you want to modify.
- Step 3 In the Proxy and Registration section, enter the Proxy.
- Step 4 In the Subscriber Information section, enter the User ID and Password.
- Step 5 Click Submit. The devices reboot.
- Step 6 To verify your progress, perform the following tasks:
- Manage Caller ID Service
- Optimize Fax Completion Rates
- Step 1 Ensure that you have enough bandwidth for the uplink and the downlink.
- Step 2 To optimize G.711 fallback fax completion rates, set the following on the Line tab of your ATA device:
- Step 3 If you are using a Cisco media gateway for PSTN termination, disable T.38 (fax relay) and enable fax using modem passthrough.
- Step 4 Enable T.38 fax on the WRP500 by configuring the following parameter on the Line tab for the FXS port to which the FAX machine is connected:
- Step 5 If you are using a Cisco media gateway use the following settings:
- Fax Troubleshooting
- Step 1 Verify that your fax machine is set to a speed between 7200 and 14400.
- Step 2 Send a test fax in a controlled environment between two ATAs.
- Step 3 Determine the success rate.
- Step 4 Monitor the network and record the following statistics:
- Step 5 If faxes fail consistently, capture a copy of the voice settings by selecting Save As > Web page, complete from the administration web server page. You can send this configuration file to Technical Support.
- Step 7 Identify the type of fax machine connected to the ATA device.
- Step 8 Contact technical support:
- Silence Suppression and Comfort Noise Generation
- Configure Dial Plans
- About Dial Plans
- Edit Dial Plans
- Enter the Line Interface Dial Plan
- Step 1 Start Internet Explorer, connect to the Configuration Utility, choose Voice > Admin Login. If prompted, enter the administrative login provided by the Service Provider. (The default username and password are both admin.)rovided by your Service...
- Step 2 Under the Voice menu, click Line 1 or Line 2, depending on the line interface that you want to configure.
- Step 3 Scroll down to the Dial Plan section.
- Step 4 Enter the digit sequences in the Dial Plan field. For more information, see “About Dial Plans,” on page 11.
- Step 5 Click Submit.
- Reset the Control Timers
- Step 1 Start Internet Explorer, connect to the Configuration Utility, choose Voice > Admin Login. If prompted, enter the administrative login provided by the Service Provider. (The default username and password are both admin.)rovided by your Service...
- Step 2 Under the Voice menu, click Regional.
- Step 3 Scroll down to the Control Timer Values section.
- Step 4 Enter the desired values in the Interdigit Long Timer field and the Interdigit Short Timer field. Refer to the definitions at the beginning of this section.
- Enter the Line Interface Dial Plan
- Secure Call Implementation
- Info page
- System page
- SIP page
- Regional page
- Line page
- Line Enable section
- Streaming Audio Server (SAS) section
- NAT Settings section
- Network Settings section
- SIP Settings section
- Proxy and Registration section
- Subscriber Information section
- Supplementary Service Subscription section
- Audio Configuration section
- Dial Plan section
- FXS Port Polarity Configuration section
- User page
- Setup
- Wireless Configuration
- Security
- Access Restrictions
- Applications and Gaming
- Administration
- Status
REVIEW DRAFT #1—CISCO CONFIDENTIAL
3-2
Cisco WRP500 Administration Guide
Chapter 3 Configure Voice Services
ATA Software Features
ATA Software Features
The WRP500 is equipped with a full featured, fully programmable ATA that can be custom provisioned
within a wide range of configuration parameters. The following sections describe the factors that
contribute to voice quality:
• “Supported Codecs,” on page 2
• “SIP Proxy Redundancy,” on page 2
• “Other ATA Software Features,” on page 3
Supported Codecs
The WRP500 supports the following codecs:
• G.711u (configured by default) and G.711a
G.711 (A-law and mµ-law) are very low complexity codecs that support uncompressed 64 kbps
digitized voice transmissions at one through ten 5 ms voice frames per packet. This codec provides
the highest voice quality and uses the most bandwidth of any of the available codecs.
• G.729a
The ITU G.729 voice coding algorithm is used to compress digitized speech. G.729a is a reduced
complexity version of G.729. It requires about half the processing power as compared to G.729. The
G.729 and G.729a bit streams are compatible and interoperable, but not identical.
The administrator can select the preferred codecs to be used for each line. See the “Audio Configuration
section,” on page 39.
In addition, negotiation of the optimal voice codec sometimes depends on the ability of an ATA to match
a codec name with the codec used by the far-end device. You can individually name the various codecs
so that the WRP500 can successfully negotiate the codec with the far-end equipment. For more
information, see the “Audio Configuration section,” on page 39.
SIP Proxy Redundancy
In typical commercial IP Telephony deployments, all calls are established through a SIP proxy server.
An average SIP proxy server may handle thousands of subscribers. It is important that a backup server
be available so that an active server can be temporarily switched out for maintenance. The WRP500
supports the use of backup SIP proxy servers (via DNS SRV) so that service disruption should be nearly
eliminated.
A relatively simple way to support proxy redundancy is to configure your DNS server with a list of SIP
proxy addresses. The WRP500 can be instructed to contact a SIP proxy server in a domain named in the
SIP message. The WRP500 consults the DNS server to get a list of hosts in the given domain that
provides SIP services. If an entry exists, the DNS server returns an SRV record that contains a list of SIP
proxy servers for the domain, with their host names, priority, listening ports, and so on. The WRP500
tries to contact the list of hosts in the order of their stated priority.
If the WRP500 is currently using a lower priority proxy server, it periodically probes the higher priority
proxy to see whether it is back on line, and switches back to the higher priority proxy when possible.
SIP Proxy Redundancy is configured in the Line and PSTN Line pages in the Configuration Utility. See
Appendix B, “Data Fields.”.