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IP Connection Management

To establish an IP connection, you use the Route Control or Outseize Control message. For information on modifying an existing connection, see the Dynamic Connection Management section.

Establishing a Two-way Connection

To establish a two-way connection, use the
Route Control/Outseize Control message with the following TLVs:

• Source IP Address

• Source RTP Port Number

• Destination IP Address

• Destination RTP Port Number

• Connection Mode: two-way

Figure 2-4 VDAC-ONE Card Connection - Two-Way

One-Way Connection

There may be situations where a one-way IP connection is needed. For example, if Gateway A wants to reserve an IP address and an RTP port, it may establish one side of an IP connection with a one-way listen only. To establish the other side of the IP connection, VDAC A then sends a request, with the IP address and RTP port just reserved, to Gateway B.

Upon receiving the request, Gateway B establishes a two-way IP connection and sends Gateway A the IP address and RTP port that it reserved for the connection. In turn, VDAC A changes the current one-way listen only connection to a full two-way connection.

To establish a one-way connection, use the Route Control/Outseize Control message and include the Universal ICB with the Source IP Address and Source Port Number TLVs. If the source IP address/port number TLVs are missing, an error is returned.

The Destination IP Address/Port Number and Connection Mode TLVs are optional.

Receive-Only Connection

To establish a Receive-only connection, use the Route Control/Outseize Control message with the following TLVs:

• Source IP Address

• Source RTP Port Number

• Connection Mode: Receive-only

• Destination IP Address (Optional)

• Destination RTP Port Number (Optional)

Example: Message

00 43 00 e8 00 00 ff 00 01 29 02 ff fe 03 03 00 33 00 12 00 02 27 92 00 04 0a 0a 24 15 27 93 00 04 00 00 00 01 02 1e 13 00 03 00 13 00 02 00 06 00 06 00 02 00 01 00 0f 00 01 0b 02 1e 07 00 01 01 db 00 01 01

Figure 2-5 VDAC-ONE Card Receive-only Connection

Transmit-Only Connection

To establish a Transmit Only connection, use the Route Control/Outseize Control message with the following TLVs:

• NPDI Universal ICB

• Source IP Address TLV

• Source RTP Port Number TLV

• Destination IP Address TLV

• Destination RTP Port Number TLV

• Connection Mode (Transmit Only)

Example: Message

00 67 00 e8 00 00 ff \

00 01 29 02 ff fe (Router AIB) 03 (ICB count)

03 00 33 00 22 00 04 (Universal ICB)

27 92 00 04 0a 0a 24 15 (Source IP Address TLV)

27 93 00 04 00 00 00 01 (Source RTP Port TLVs)

27 94 00 04 0a 0a 24 16 (Destination IP Address TLV)

27 95 00 04 00 00 00 01 (Destination RTP Port TLV)

02 1e 13 00 03 00 13 00 02 00 06 00 06 00 02 00 01 00 0f 00 01 0b (Router ICB) 02 1e 07 00 01

01 db 00 01 02 (Connection Mode TLV)

Figure 2-6 VDAC-ONE Card Connection - Transmit-only Connection

Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.
Outgoing call setup during real-time call processing on a specific channel.
A 32-bit address, used in IP routing, which includes a Network address identifier assigned by a central authority and a Host ID (an end station identifier assigned by a LAN administrator).
Real-Time Transport Protocol. Supports transport of real-time data like interactive voice and video over packet-switched networks.
The point in the Excel platform where a DS0 connects to a network. Also known as a "socket."
Voice Data Access Concentrator Card. Performs two-way conversion between circuit-switched data and packet-switched Ethernet data required by packetized voice applications such as VoIP.
A device that translates calls between an IP network and another network, typically the PSTN.
See Information Control Block.
Network Protocol Data Intelligence. Also called “Interworking,” it is a software product that operates within Excel’s Call Control (Layer 4) and Services (Layer 5) call processing layers. NPDI is meant to enhance Excel’s call processing product offering by allowing call processing layers (specifically Layers 4 and 5) to perform advanced analysis, generation, and conversion of Network Signaling (NS) Layer 3 information.
Tag-Length-Value block. A standardized block that allows data to inserted in a standard way into API messages.
See Address Information Block.