AudioCodes Mediant 1000

This article describes the setup of the AlphaCom E system and the AudioCodes Mediant 1000 Gateway. The Mediant 1000 supports mixed digital and analog interface configurations, providing up to four E1/T1/J1 spans and up to 24 analog interfaces in various FXO/FXS configurations. Although this article describes the configuration for digital interface E1 using QSIG protocol, it will also be useful when configuring the Mediant 1000 for analog FXO/FXS or ISDN lines.

Configuration example

AlphaCom Configuration

How to set up a SIP Trunk in the AlphaCom is described here: SIP trunk node - configuration

AudioCodes Mediant 1000 Configuration

Configure Network Parameters

The AudioCodes Mediant 1000 VoIP Gateway comes with default network parameters (factory default parameters).

Before you can set up the gateway in the network, you have to change the default IP address to a fixed IP address in your network environment. The unit is configured from a web browser, e.g. Internet Explorer or Firefox. Consult the network administrator to get the correct IP address.

Follow these steps:

• Load factory network parameters and reset the username and password to its default settings (username: Admin, password: Admin) by pressing the reset button located to the right of ethernet port II, and directly above the RS-232 port, labeled // for minimum 6 seconds.
  • The VoIP Gateway will now get the IP address 192.168.0.2, submask 255.255.255.0.
• Change the IP address of your PC to 192.168.0.10, submask 255.255.255.0.
• Connect the LAN port of the PC to the Ethernet port I of the VoIP Gateway. Use a crossed cable or connect the PC and the VoIP Gateway to a common switch using straight cables.

PC connected for management

• Start your Web Browser and type 'http://192.168.0.2' in the URL field. A log-in window appear, type in user name Admin and password Admin. (Case-sensitive!). Now the ‘Quick Setup’ screen opens.

Quick Setup menu - Mediant 1000

IP Configuration
Enter the IP Address and Subnet Mask of the AudioCodes Gateway. This IP address must be identical to the IP address of the SIP Trunk Node created in AlphaPro.

SIP Parameters
Set Working with Proxy to Yes. Enter the IP address of the AlphaCom in the Proxy IP Address field. Set Enable Registration to Disable. Leave Gateway Name and Proxy Name blank.

• Click Reset button and OK button to apply the changes.
• Disconnect the PC from the Gateway.
• Reconnect the Ethernet port I of the VoIP Gateway to the LAN
• Reconnect the PC to the LAN.
• Restore the PC’s IP address and subnet mask to what they originally were, and re-access the Gateway using the new assigned IP address.

Audio Codec

Audio Codec settings

In the Quick Setup screen, select Coders Table. Choose G.711U-law codec, 10 ms packet size and silence suppression Disabled.

• Press Submit to save changes.

About Saving Changes

The Submit button will save the data to the running volatile memory. The changes take effect on-the-fly. The changes will not survive hardware reset or power off.

To permanently save the configuration data you need to store the data to flash memory by selecting Maintenance from the main menu. Click the BURN button. A confirmation message appears when the save is completed successfully.

Note: Parameters proceeded by an exclamation mark (!) is not changeable on-the-fly and require that the device is reset.

Backup and Restore

The configuration of the AudioCodes Gateway can be stored to a file on your PC. Use the Configuration File menu to store or restore the configuration (Advanced Configuration > Configuration File).

AlphaCom to Telephone Network

Trunk Settings

In Advanced Configuration > Trunk Settings you specify the properties of the trunk line. Select the protocol to be used for the trunk (Protocol Type), the trunk clock source (Clock Master), Line Code and physical framing to be used (Framing Method), and other relevant parameters.

Mediant 1000 - Trunk Settings

Define a Trunk Group

In Protocol Management > Trunk Group you specify which channels to use on the E1 trunk, and assign the trunk to a Trunk Group ID and a Profile ID:

Mediant 1000 - Trunk Group Table

Trunk Group Settings

In Protocol Management > Trunk Group Settings you assign the rules for channel allocation:

Mediant 1000 - Trunk Group settings

IP to Trunk Group routing

In Protocol Management > Routing Tables > IP to Hunt Group Routing you specify the Trunk Group ID to use for call from IP (i.e. calls from AlphaCom E). In the example below all calls from AlphaCom are routed to Trunk Group 1.

IP to Trunk Group Routing Table

Telephone Network to AlphaCom

Because the AlphaCom is defined as a Proxy Server in the SIP Gateway, you do not need to configure any Tel to IP Routing. The calling telephone number is automatically forwarded to the Proxy Server (i.e. the AlphaCom).

Miscellaneous Features

Incoming Calls in Private

Incoming calls from the telephone line can be forced to be in private ringing mode, independent of the private/open switch of the intercom station (available from AlphaPro/AMC 10.05).

From AlphaPro 10.05: Check the flag Private Ringing from SIP in Exchange & System > System > Calls and Options.

From AlphaPro 10.26: Check the flag Incoming calls from SIP in private ringing mode in Exchange & System > System > VoIP.

Door Opening Feature

During a conversation between a door station and a telephone, the telephone operator can activate the Door Opening feature in the AlphaCom by pressing digit 6.

SIP Gateway Feature

To enable digit actions from the telephone line during conversation, set 1st Tx DTMF Option to INFO(Cisco) in Protocol Management > Protocol Definition > DTMF & Dialing.

AlphaCom configuration

The Door Opening feature is programmed in the Event Handler. There are two separate events for the door opening feature, depending on who is the calling side:

Door Opening when SIP calls the door

Calling from the telephone to the door
The Standard door opening event is used.

Door Opening when door calls out on SIP gateway

Calling from the door to the telephone

When the phone presses digit 6, the event type Event Trigger Feature (15) is reported, with the digit 6 as sub event. The calling AlphaCom station is Event Owner, and called SIP phone number and node number is Related To. The RCO pulse time is specified as an additional parameter in the RCO action string, i.e. RCO 3 ON 20 means pulse RCO 3 for 2 seconds.

M-key Control from Telephone Network

The ‘*’ and ‘#’ buttons on the telephone can be used to control M-key function (simplex audio) ON or OFF:

• Press the ‘*’-key briefly and the M-key is turned ON
• Press the ‘#’-key briefly and the M-key is turned OFF

This can be useful for group call announcement from the telephone. The feature is enabled by setting 1st Tx DTMF Option to INFO(Cisco) in Protocol Management > Protocol Definition > DTMF & Dialing.

Transmit ‘*’ and ‘#’ from AlphaCom

The DTMF signals ‘*’ and ‘#’ will be transmitted to the line when DAK 0 (*) and DAK 1 (#) is pressed during a telephone conversation. (No programming is required).

Voice Switching in Noisy Environment

If the intercom station is located in a noisy environment, it might be difficult to switch the voice direction from the telephone towards the intercom station. However, there is a setting in the AlphaCom to overcome this problem.

In AlphaPro, go to Exchange & System > System > Voip. Set the flag Optimized voice duplex control when conversation with SIP trunk/stations. This flag is avaliable from AMC 10.05 and AlphaPro 10.26.

When the flag is set, the initial voice direction is forced to be from the intercom towards the telephone. When the phone operator starts to speak, the voice direction will switch towards the intercom station, regardless of the level of the audio signal from the intercom station. As soon as the phone operator stops speaking, the voice direction will switch back to the initial direction.

Make sure that the Echo Canceler is enabled in the SIP Gateway. (Protocol Management > Profile Definitions > Tel Profile Settings > Echo Canceler = Enable)

Feature Guide

• The telephone line is accessed either by dialing a:
  • Prefix number: Dial Prefix + Phone number. Use M-key as a “Send” button, or wait for the number to be sent automatically.
  • Global number: Dial the phone number without using prefix
• When pressing digits during connection, DTMF digits are sent (Call center etc.)
• The DTMF signals ‘*’ and ‘#’ will be transmitted when pressing DAK 0 (*) and DAK 1 (#)
• A complete phone number can be stored under a DAK key or a substation call button (From AMC 10.05)
  • Program from station: 784 + <prefix> + <phone number> + M + DAK key. Example: 784 + 0 + 40002500 + M + DAK key
  • Program from AlphaPro: I <prefix> P <phone number> M. Example: I 0 P 40002500 M

Call Transfer

• Incoming calls from the line can be transferred to another station
  • From keypad: 2 + <intercom station> + 3
  • From preprogrammed DAK: D 2 I 104 M M D 3

• Outgoing calls to the line can be transferred to another station
  • From keypad: DAK8 + 2 + <intercom station> + 3

Call Forwarding

• An intercom call can be forwarded to a telephone
  • From keypad: 71 + 0 + <phone number> + M
  • From preprogrammed DAK: I 71 I 0 P 40002500

Search List

• A telephone number can be included in the Search List of a station.
  • Format: I <prefix> P <phone number>. Example: I 0 P 40002500