How to configure RtpBridge via Alvis Web Interface?

Installing the Alvis Web Interface

If you have no Alvis Web interface installed please go to the Alvis CLI and type the commands:

> apt-get update

> apt-get install rtpbridge-webif

> sync

Accessing the Alvis Web Interface

The Login page of the Alvis web interface is the first window to appear when you launch the Alvis web interface.

To access the Alvis web interface, open a browser and enter the IP address of the Alvis unit like http://XX.XX.XX.XX in the Address field of your browser.

The Login page window opens in the browser window.

Input your account credentials (Login and Password) and press "Log In button" to enter the web interface.

The default user is “admin” with “alvispbx” password.

To change the default password, enter the Alvis CLI and type the command:

> passwd www

Enter the new password twice.

RtpBridge configuration in the Alvis Web Interface

The Alvis web interface shows detailed information about the events and processes that the Alvis operates with. To access the RtpBridge web interface configuration press the RtpBridge tab in the top menu. The RtpBridge configuration tab includes the following sub tabs:

Tab	Description
Status	Allows to browse available spans, timeslots and connections status.
Global configuration	Allows to change Global Configuration file.
E1/T1 Setup	Uses to set the parameters of Layer1.
N64 Gateway Setup	Uses to set the parameters of N64 Gateway.
RTP Gateway Setup	Uses to set the parameters of RTP Gateway.
HDLC Gateway Setup	Uses to set the parameters of HDLC Gateway.
Backup/Restore	Backup and restore of configuration.
License	License installation.

Line interfaces Status

You can check the Li Status visiting “Status” menu item in the “RTP Bridge” tab. See the picture below.

Press “Refresh” button to see current system conditions.

When Layer 1 is configured correctly and matching the configuration of the E1/T1 span then LED is green. Yellow is an indication of that the Li has some sort of electrical signal, but it can not frame to this signal. Red LED is an indication of Loss of Signal. If you do not get the green Layer 1 status LED, you should analyze the Layer 1 status window and review the Layer 1 configuration parameters.

Global Configuration

To change the global configuration input commands in the edit box and press "Save config" button.

For example, you can load N64/RTP/HDLC parameters from the configuration files (see the picture below).

Setting Layer1 parameters

Before setting up N64/RTP/HDLC Gateway, please set the appropriate Layer1 parameters. Go to the “RTP Bridge” tab and select “E1/T1 Setup” menu item. You will see the default settings of Layer1 (see pictures below).

Default settings for E1 mode:

Default settings for T1 mode:

If you have other values for T1/E1 Li Mode, Line termination mode, E1 Frame Format, E1 Line Code, etc, then select them from drop-down boxes and click “Save” button. Your configuration will be saved.

E1 Properties (Layer 1 settings)

Select E1 option in the T1/E1 Li Mode.

Line termination mode:

• Terminate - 120 ohm balanced differential signal - Span is terminated for 120 ohm twisted pair (balanced differential signal)
• Terminate - 100 ohm balanced differential signal - Span is terminated for 100 ohm twisted pair (balanced differential signal)
• Terminate - 75 ohm coax (unbalanced unipolar signal) - Span is terminated for 75 ohm coax (unbalanced unipolar signal)
• Bridge HighZ - Span is not terminated (Balanced, High impedance, for monitoring scenarios when short (< 2 meter) monitor taps are used)
• Terminate - 75 ohm balanced differential signal (for special monitoring conditions) - Span is terminated for 75 ohm balanced differential signal (for special monitoring conditions)
• Terminate - 300 ohm twisted pair (balanced differential signal) - Span is terminated for 300 ohm twisted pair (balanced differential signal)

E1 Frame Format:

• DOUBLE FRAME :PCM31 - Double Frame: PCM31
• CRC4 MULTIFRAME :PCM31 - Cyclic redundancy check 4 Multiframe: PCM31
• CRC4 MULTIFRAME G.706 :PCM31 - CRC4 Multiframe format with modified CRC4 Multiframe alignment
• UNIFRAMED :PCM32 - PCM32 Unframed E1 (Transparent) mode. In this mode data for timeslot 0 (normally the frame synchronization timeslot) has to be provide via timeslot 0 of the highway to this device.

E1 Line Code:

• AMI - Alternative Mark Inversion (AMI) Line Coding
• B8ZS - Bipolar 8 Zero Subsititution (B8ZS) Line Coding

Receive threshold - set a value in mV, by default 500

Monitor Mode:

• NO - Monitor mode disabled
• YES - Monitor mode enabled

Front End Amplifier:

• OFF - Amplifier is disabled
• ON - Amplifier is enabled

Clock Source:

• Master(Internal)
• Slave Line 0
• Slave Line 1

Note: The wrong Clock Source settings would result in Positive or Negative Slips events. One end of a E1 span should be configured as a clock master and the other as a clock slave.

T1 Properties (Layer 1 settings)

Select T1 option in the T1/E1 Li Mode.

Line termination mode:

• Terminate - 120 ohm balanced differential signal - Span is terminated for 120 ohm twisted pair (balanced differential signal)
• Terminate - 100 ohm balanced differential signal - Span is terminated for 100 ohm twisted pair (balanced differential signal)
• Terminate - 75 ohm coax (unbalanced unipolar signal) - Span is terminated for 75 ohm coax (unbalanced unipolar signal)
• Bridge HighZ - Span is not terminated (Balanced, High impedance, for monitoring scenarios when short (< 2 meter) monitor taps are used)
• Terminate - 75 ohm balanced differential signal (for special monitoring conditions) - Span is terminated for 75 ohm balanced differential signal (for special monitoring conditions)
• Terminate - 300 ohm twisted pair (balanced differential signal) - Span is terminated for 300 ohm twisted pair (balanced differential signal)

T1 Frame Format:

• F12 - 12-frame multiframe format (F12, D3/4, SF)
• F4 - 4-frame multiframe format (F4)
• ESF - 24-frame multiframe format (F24, ESF)
• F72 - 72-frame multiframe format (F72, SLC96, remote switch mode)
• F12_J1 - J1 variant of 12-frame multiframe format (F12, D3/4, SF)
• F4_J1 - J1 variant of 4-frame multiframe format (F4)
• ESF_J1 - J1 variant of 24-frame multiframe format (F24, ESF)
• F72_J1 - J1 variant of 72-frame multiframe format (F72, SLC96, remote switch mode)
• FF_UNFRAMED - Unframed (Transparent) mode. In this mode the DL-bit is provided to the T1E1 device via one bit in Timeslot 0 of the highway to this device.

T1 Line Code:

• AMI - Alternative Mark Inversion (AMI) Line Coding
• B8ZS - Bipolar 8 Zero Subsititution (B8ZS) Line Coding

Receive threshold - set a value in mV, by default 500

Monitor Mode:

• NO - Monitor mode disabled
• YES - Monitor mode enabled

Front End Amplifier:

• OFF - Amplifier is disabled
• ON - Amplifier is enabled

Clock Source:

• Master(Internal)
• Slave Line 0
• Slave Line 1

Note: The wrong Clock Source settings would result in Positive or Negative Slips events. One end of a T1 span should be configured as a clock master and the other as a clock slave.

Setting up the N64 Gateway

First of all you should know MAC address of the PC. In the command line of your PC type the command:

> ifconfig

To set up N64 streaming, open “N64 Gateway Setup” menu item and configure the following parameters:

1. Select the number of connections in the “Connections count” drop-down box. This number is dependent on the number of available E1/T1 spans.
2. Make the following steps for every span:
   1. Type MAC address into “Remote MAC” field. Check the “Use this MAC for all connections” check box if you will use the same PC for all connections.
   2. Select TDM Span and N64 ID (from 0 to 31) in the appropriate columns. Note: The N64 ID for receive/transmit should be unique. Do not create channels with the same ID because RtpBridge can not receive them.
3. Note that you can Enable/Disable any connection by check in/check out an arrow near the appropriate connection.
4. When configuration is set, press “Save” button.

See an example on the picture below.

Verify that connections are created by visiting the “Status” menu item.

Setting up the RTP Gateway

To set up RTP Gateway, open “RTP Gateway Setup” menu item and configure the following parameters:

1. Select the number of connections in the “Connections count” drop-down box. This number is dependent on the number of available E1/T1 spans.
2. Make the following steps for every RTP <--> TDM streaming connection:
   1. Choose the direction of streaming: TDM --> RTP or RTP --> TDM.
   2. Configure TDM: select Span, Timeslot (from 0 to 31) and codec (g711a, g711u, slin).
   3. Configure RTP: input Host/IP address, Remote and Local ports, select codec (g711a, g711u, g723, g726, g729, slin, gsm, gsm-fr).
3. Note that you can Enable/Disable any connection by check in/check out an arrow near the appropriate connection.
4. When configuration is set, press “Save” button.

See an example on the picture below.

Setting up the HDLC Gateway

To set up HDLC Gateway, open “HDLC Gateway Setup” menu item and configure the following parameters:

1. Select the number of connections in the “Connections count” drop-down box. This number is dependent on the number of available E1/T1 spans.
2. Make the following steps for every HDLC <--> UDP streaming connection:
   1. Choose the direction of streaming: TDM (HDLC) --> UDP or UDP --> TDM (HDLC).
   2. Configure TDM (HDLC): select Span, Timeslot (from 0 to 31).
   3. Configure UDP: input Host/IP address, Remote and Local ports.
   4. Input additional parameters in "Options" field if needed (see HDLC-UDP).
3. Note that you can Enable/Disable any connection by check in/check out an arrow near the appropriate connection.
4. When configuration is set, press “Save” button.

See an example on the picture below.

Verify that connections are created by visiting the “Status” menu item.

Configuration Backup/Restore

For backup configuration you can simply download current RTP Bridge configuration by pressing "Download configuration" link.

For restore configuration upload provisionally downloaded backup configuration. Choose a backup file and press "Restore" button.

Installing a License

Here you can see your RtpBridge license information (installed license files and license files information) and manage your license (add/remove).

To add a new license choose a .lic file in a file manager and press "Upload" button.

Troubleshooting

I can not install web interface.

Please check the network settings (IP address, gateway, DNS) to connect to the RPM repository.

I installed the web interface, but I can not access it.

Check the Ethernet connection and your network parameters.

I have a yellow LED in the Li Status window.

You experience the Loss of Frame condition. Please check the E1/T1 parameters.

I have a red LED in the Li Status window.

You experience the Loss of Signal condition. Please check the E1/T1 parameters.

If you have any problems with setting up N64/RTP/HDLC Gateways on Alvis series, please do not hesitate to contact us. We are proud of our unique Technical Support program. Once you are our customer you are provided free unlimited support for technical questions regarding our products and solutions. Our Technical Support Engineers will communicate directly with you, via phone, Skype or email.