0x01EA VoIP Terminal Capabilities

The Resource Attribute Query message is used to query an IP endpoint’s terminal capabilities using this TLV. The report returned is based on the resource profile assigned to the module.

Important! The VoIP Terminal Capabilities can be queried by addressing either the IP Address AIB or Extended Span/Channel AIB embedded within the Address Element TLV.

Used in:
Resource Attribute Query message

Byte | Description
0, 1 | Tag VoIP Resource Profile Assign (0x01EA)
2, 3 | Length Variable
4 | Data [0] VoIP Profile ID 0x00 VDAC-ONE 0x01 IP Network Interface Series 2 - G.711 Only 0x02 IP Network Interface Series 2 - LBR + T.38 0x03 Reserved
5 | Data [1] Echo Canceler Tail Length (in ms)
6, 7 | Data [2] MSB Jitter Buffer Length (in ms) Data [3] LSB Jitter Buffer Length (in ms)
8 | Data [4] Silent Suppression Support (bitmask) 0x00 No Support 0x01 Generic VDAC Support 0x02 G.723.1 Annex A Support 0x03 G.729 Annex B Support
9 | Data [5] Fax Relay Supported (bitmask) 0x00 No Support 0x01 Support using T.38
11 | Data [6] Modem Relay Supported (bitmask) 0x00 No Support
12 | Data [7] Digit Relay Support (bitmask) 0x00 No Support 0x01 Support using RFC 2833 0x03 Support using RFC 2833 and Payload Type Dynamically Configurable (IP Network Interface Series 2 only)
13 | Data [8] RTP Redundancy Support (bitmask) 0x00 No Support 0x01 Support using RFC 2198 0x03 Support using RFC 2198 and Payload Type Dynamically Configurable (IP Network Interface Series 2 only)
14 | Data [9] Number of Coders Supported (bitmask)
15 | Vocoder [1] Payload Type
16 | Vocoder [1] Basic Packet Rate (in ms)
17 | Vocoder [1] Maximum Packet Rate (multiples of Basic Rate)
... | ...
... ... 14+n*3 | Vocoder [n] Payload Type Vocoder [n] Basic Packet Rate (in ms) Vocoder [n] Maximum Packet Rate (multiples of Basic Rate)

Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.
Tag-Length-Value block. A standardized block that allows data to inserted in a standard way into API messages.
Voice over Internet Protocol. The delivery of voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public-switched telephone network (PSTN).
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).
See Address Information Block.
Range of channels provided by T1 or E1 transmission service. A physical span is a group of channels taking up a single physical wire. A logical span is a group of channels taking up less than a single logical wire, or carried over more than one physical wire.
The information in an AIB that follows the header, down to the data field. An AIB can have one or more Address Elements. AEs correspond to Span, Channel, and SS7 Link.
Most Significant Bit
Least Significant Bit
Real-Time Transport Protocol. Supports transport of real-time data like interactive voice and video over packet-switched networks.
Voice coder.