Interoperability

Supported version of H.323

H.323 Version 2, decided January 1998

Interoperable with Microsoft NetMeeting

Yes, versions 2.1 and 3.01

Options

Encryption

No

Procedures for T.120

No

Early H.245 initiation for gateway interoperation

Yes

H.323 version 2 options

Fast connect procedure (fast start)

Yes

Encapsulation of H.245 messages within H.225/Q.931 messages (H.245 tunneling)

Yes

Transport of DTMF signals

Yes, out-of-band via H.245 userInputIndication messages

Third-party initiated pause and re-routing (empty capability set)

No

Gatekeeper interoperability

Gatekeeper procedures

Yes, all supported except bandwidth management

Supplementary services

Supplementary services via H.245 procedures

No

Call Hold/Retrieve

Yes, via zero-rate H.245 flowControl command (see Two (or more) simultaneous calls)

Multiple simultaneous calls

Yes, unlimited (see Two (or more) simultaneous calls)

Ad-hoc conference (dynamic creation of Multipoint Controller (MC) in endpoint)

Yes, media distribution using multi-unicast, unlimited number of participants

Invitation to ad-hoc conference

Yes (see Conference by invitation)

Merging of connected point-to-point call into other point-to-point call or ad-hoc conference.

Yes, via H.225/Q.931 FACILITY message (see Conference by merging two existing calls)

Joining of alerting point-to-point call into other point-to-point call or ad-hoc conference.

Yes, via H.225/Q.931 FACILITY message (see Conference by merging an incoming call)

Supervised Call Transfer

Yes, via temporary ad-hoc conference (see Call transfer, supervised)

Multiline Appearance (simultaneous presentation of a call to several terminals)

Yes, via multiple outgoing H.323 calls (see Multiline appearance)

Multimedia

Procedures for controlling audio channels

Yes, up to one outgoing and one incoming per peer participant.

Procedures for controlling video channels

Yes, up to two outgoing and two incoming per peer participant.

Procedures for layered video

No

Interoperability

Supported version of JTAPI

JTAPI version 1.2

Core package

Fully supported, except java.telephony.capabilities

Options

Call center package

Not supported

Call control package

Important subset supported determined by the supported supplementary services (see above)

Media package

Support for sending and receiving DTMF signals

Phone package

Not supported

Private data package

Private data supported a call setup

Extension for multimedia

Multimedia package

New package to manipulate audio/video streams.