Bearer capability
Coding standard	ITU-T standardized coding ISO/IEC Standard National standard Standard defined for the network
Information transfer capability	Speech Unrestricted digital information Restricted digital information 3.1 kHz audio Unrestricted digital information with tones/announcements Video
Transfer mode	Circuit mode Packet mode
Information transfer rate	64 kbit/s 2 × 64 kbit/s 384 kbit/s 1536 kbit/s 1920 kbit/s Multirate (64 kbit/s base rate)
Rate multiplier
User information layer 1 protocol	ITU-T standardized rate adaption V.110, I.460 and X.30 Recommendation G.711 u-law Recommendation G.711 A-law Recommendation G.721 32 kbit/s ADPCM and Recommendation I.460 Recommendations H.221 and H.242 Recommendations H.223 and H.245 Non-ITU-T standardized rate adaption ITU-T standardized rate adaption V.120 ITU-T standardized rate adaption X.31
Sync/Async Data	Synchronous Asynchronous
In-band negotiation	Not possible Possible
User Rate	Rate indicated by E-bits 0.6 kbit/s 1.2 kbit/s 2.4 kbit/s 3.6 kbit/s 4.8 kbit/s 7.2 kbit/s 8 kbit/s 9.6 kbit/s 14.4 kbit/s 16 kbit/s 19.2 kbit/s 32 kbit/s 48 kbit/s 56 kbit/s 64 kbit/s 0.1345 kbit/s 0.100 kbit/s 0.075/1.2 kbit/s 1.2/0.075 kbit/s 0.050 kbit/s 0.075 kbit/s 0.110 kbit/s 0.150 kbit/s 0.200 kbit/s 0.300 kbit/s 12 kbit/s
Intermediate rate	8 kbit/s 16 kbit/s 32 kbit/s
NIC on Tx	Not required to send data with network independent clock Required to send data with network independent clock
NIC on Rx	Cannot accept data with network independent clock Can accept data with network independent clock
Flow control on Tx	Not required to send data with flow control mechanism Required to send data with flow control mechanism
Flow control on Rx	Cannot accept data with flow control mechanism Can accept data with flow control mechanism
Rate adaption header	Header not included Header included
Multiple frame establishment support in data link	Multiple frame establishment not supported Multiple frame establishment supported
Mode of operation	Bit transparent mode of operation Protocol sensitive mode of operation
Logical link identifier negotiation	Default, LLI = 256 only Full protocol negotiation
Assignor or assignee	Message originator is "Default assignee" Message originator is "Assignor only"
In-band/out-band negotiation	Negotiation is done with USER INFORMATION messages Negotiation is done in-band using logical link zero
Number of stop bits	1 bit 1.5 bits 2 bits
Number of data bits	5 bits 7 bits 8 bits
Parity	Odd Even None Forced to 0 Forced to 1
Duplex mode	Half duplex Full duplex
Modem type	V.21 V.22 V.22 bis V.23 V.26 V.26 bis V.26 ter V.27 V.27 bis V.27 ter V.29 V.32 V.34
User information layer 2 protocol	Recommendation Q.921/I.441 Recommendation X.25, link layer LAN logical link control (ISO/IEC 8802-2)
User information layer 3 protocol	Recommendation Q.931 Recommendation X.25, packet layer ISO/IEC TR 9577(Protocol identification in the network layer)
Additional layer 3 protocol information	Internet Protocol (RFC 791) (ISO/IEC TR 9577) Point-to-point Protocol (RFC 1548)
Channel identification
Interface identifier present	Interface implicitly identified Interface explicitly identified in one or more octets
Interface type	Basic interface Other interface, e.g. primary rate
Preferred/Exclusive	Indicated channel is preferred Exclusive; only the indicated channel is acceptable
D-channel indicator	The channel identified is not the D-channel The channel identified is the D-channel
Information channel selection	No channel B1 channel B2 channel Any channel
Interface identifier
Coding standard	ITU-T standardized coding ISO/IEC Standard National standard Standard defined for the network
Number/map	Channel is indicated by the number in the following octet Channel is indicated by the slot map (Map) in the following octet(s)
Channel type/map element type	B-channel units H0-channel units H11-channel units H12-channel units
Channel number
Slot map
Progress indicator
Coding standard	ITU-T standardized coding ISO/IEC Standard National standard Standard defined for the network
Location	User Private network serving the local user Public network serving the local user Transit network Public network serving the remote user Private network serving the remote user Network beyond the interworking point
Progress description	Call is not end-to-end QSIG; further call progress information may be available in-band Destination address is non-QSIG Origination address is non-QSIG Call has returned to the QSIG Interworking has occurred and has resulted in a telecommunication service change In-band information or an appropriate pattern is now available
Display
Display
Date/Time
Date/Time	Year: Month: Day: Hour: Minute: Second:
Signal
Signal	Dial tone on Ring back tone on Intercept tone on Network congestion tone Busy tone on Confirm tone on Answer tone on Call waiting tone Off-hook warning tone Pre-emption tone on Tones off Alerting on – pattern 0 Alerting on – pattern 1 Alerting on – pattern 2 Alerting on – pattern 3 Alerting on – pattern 4 Alerting on – pattern 5 Alerting on – pattern 6 Alerting on – pattern 7 Alerting off
Low layer compatibility
Coding standard	ITU-T standardized coding ISO/IEC Standard National standard Standard defined for the network
Information transfer capability	Speech Unrestricted digital information Restricted digital information 3.1 kHz audio Unrestricted digital information with tones/announcements Video
Negotiation indicator	Out-band negotiation not possible Out-band negotiation possible Negotiation indicator not used
Transfer mode	Circuit mode Packet mode
Information transfer rate	64 kbit/s 2 × 64 kbit/s 384 kbit/s 1536 kbit/s 1920 kbit/s Multirate (64 kbit/s base rate)
Rate multiplier
User information layer 1 protocol	ITU-T standardized rate adaption V.110, I.460 and X.30 Recommendation G.711 u-law Recommendation G.711 A-law Recommendation G.721 32 kbit/s ADPCM and Recommendation I.460 Recommendations H.221 and H.242 Recommendations H.223 and H.245 Non-ITU-T standardized rate adaption ITU-T standardized rate adaption V.120 ITU-T standardized rate adaption X.31
Sync/Async Data	Synchronous Asynchronous
In-band negotiation	Not possible Possible
User Rate	Rate indicated by E-bits 0.6 kbit/s 1.2 kbit/s 2.4 kbit/s 3.6 kbit/s 4.8 kbit/s 7.2 kbit/s 8 kbit/s 9.6 kbit/s 14.4 kbit/s 16 kbit/s 19.2 kbit/s 32 kbit/s 48 kbit/s 56 kbit/s 64 kbit/s 0.1345 kbit/s 0.100 kbit/s 0.075/1.2 kbit/s 1.2/0.075 kbit/s 0.050 kbit/s 0.075 kbit/s 0.110 kbit/s 0.150 kbit/s 0.200 kbit/s 0.300 kbit/s 12 kbit/s
Intermediate rate	8 kbit/s 16 kbit/s 32 kbit/s
NIC on Tx	Not required to send data with network independent clock Required to send data with network independent clock
NIC on Rx	Cannot accept data with network independent clock Can accept data with network independent clock
Flow control on Tx	Not required to send data with flow control mechanism Required to send data with flow control mechanism
Flow control on Rx	Cannot accept data with flow control mechanism Can accept data with flow control mechanism
Rate adaption header	Header not included Header included
Multiple frame establishment support in data link	Multiple frame establishment not supported Multiple frame establishment supported
Mode of operation	Bit transparent mode of operation Protocol sensitive mode of operation
Logical link identifier negotiation	Default, LLI = 256 only Full protocol negotiation
Assignor or assignee	Message originator is "Default assignee" Message originator is "Assignor only"
In-band/out-band negotiation	Negotiation is done with USER INFORMATION messages Negotiation is done in-band using logical link zero
Number of stop bits	1 bit 1.5 bits 2 bits
Number of data bits	5 bits 7 bits 8 bits
Parity	Odd Even None Forced to 0 Forced to 1
Duplex mode	Half duplex Full duplex
Modem type	V.21 V.22 V.22 bis V.23 V.26 V.26 bis V.26 ter V.27 V.27 bis V.27 ter V.29 V.32 V.34
User information layer 2 protocol	Basic mode ISO 1745 Recommendation Q.921/I.441 Recommendation X.25, link layer Recommendation X.25, Multilink Extended LAPB; for half duplex operation (Recommendation T.71 ) HDLC ARM (ISO/IEC 4335) HDLC NRM (ISO/IEC 4335) HDLC ABM (ISO/IEC 4335) LAN logical link control (ISO/IEC 8802-2) Recommendation X.75. Single Link Procedure (SLP) Recommendation Q.922 Core aspects of Recommendation Q.922 User specified ISO/IEC 7776 DTE-DCE operation
Mode of operation	Normal mode of operation Extended mode of operation
Q.933 use	For use when the coding defined in Recommendation Q.933 is not used
User specified layer 2 protocol information
Window size
User information layer 3 protocol	Recommendation Q.931 Recommendation X.25, packet layer ISO/IEC 8208 (X.25 packet level protocol for data terminal equipment) ITU-T Rec. X.223 and ISO/IEC 8878 ISO/IEC 8473 (OSI connectionless mode protocol) Recommendation T.70 minimum network layer ISO/IEC TR 9577(Protocol identification in the network layer) User specified
Optional layer 3 protocol information
Mode of operation	Normal packet sequence numbering Extended packet sequence numbering
Default packet size	16 octets 32 octets 64 octets 128 octets 256 octets 512 octets 1024 octets 2048 octets 4096 octets
Packet window size
Additional layer 3 protocol information	Internet Protocol (RFC 791) (ISO/IEC TR 9577) Point-to-point Protocol (RFC 1548)
High layer compatibility
Coding standard	ITU-T standardized coding ISO/IEC Standard National standard Standard defined for the network
Interpretation	First high layer characteristics identification to be used in the call
Presentation method of protocol profile	High layer protocol profile
High layer characteristics identification	Telephony Facsimile Group 2/3 Facsimile Group 4 Class I Facsimile service Group 4, Classes II ad III Syntax based Videotex International Videotex interworking via gateways or interworking units Telex service Message Handling Systems OSI application FTAM application Reserved for maintenance Reserved for management Videotelephony Videoconferencing Audiographic conferencing Multimedia services
Extended High layer characteristics identification	Telephony Facsimile Group 2/3 Facsimile Group 4 Class I Facsimile service Group 4, Classes II ad III Syntax based Videotex International Videotex interworking via gateways or interworking units Telex service Message Handling Systems OSI application FTAM application Reserved for maintenance Reserved for management Videotelephony Videoconferencing Audiographic conferencing Multimedia services
Extended videotelephony characteristics identification	Capability set of initial channel of H.221 Capability set of subsequent channel of H.221 Capability set of initial channel associated with an active 3.1 kHz audio or speech call