1、 TIA-777-A (Revision of TIA-777) May 2003Telecommunications Telephone Terminal Equipment Caller Identity and Visual Message Waiting Indicator Equipment Performance Requirements ANSI/TIA-777-A-2003 APPROVED: MAY 23, 2003 REAFFIRMED: FEBRUARY 4, 2011 REAFFIRMED: JUNE 14, 2016 NOTICE TIA Engineering St
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23、DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-777-A i TABLE OF CONTENTS 1 SCOPE 1 2 NORMATIVE REFERENCES 1 3 ABBREVIATIONS, ACRONYMS, AND DEFINITIONS 2 3.1 ABBREVIA
24、TIONS AND ACRONYMS 2 3.2 DEFINITIONS . 2 4 TECHNICAL CRITERIA FOR CPE 4 4.1 MANDATORY, RECOMMENDED, AND PERMISSIVE CRITERIA. 4 5 TYPE 1 CPE GENERAL. 4 5.1 TYPE 1 CPE FUNCTIONALITY. 4 5.2 TYPE 1 PROTOCOL 4 5.2.1 FSK following Power Ringing 4 5.2.2 FSK without Power Ringing . 5 5.2.3 Time-out and Rese
25、tting Capabilities . 5 5.2.4 Type 1 Message Preamble.6 5.2.4.1 Channel Seizure Signal 6 5.2.4.2 Mark Signal 6 5.2.4.3 Binary & ASCII Encoding. 6 5.2.5 Message Formats. 6 5.2.5.1 Message Types . 7 5.2.5.2 Message Length 8 5.2.5.3 SDMF Message Type 8 5.2.5.3.1 SDMF Calling Number. 8 5.2.5.3.2 SDMF Rea
26、son for Absence of Directory Number 9 5.2.5.4 MDMF Message Format 9 5.2.5.4.1 Parameter Types 9 5.2.5.4.2 Parameter Length. 10 5.2.5.4.3 Parameter Field Definitions. 10 5.2.5.4.3.1 MDMF Date and Time Parameter. 10 5.2.5.4.3.2 MDMF Calling Number Parameter. 11 5.2.5.4.3.3 MDMF Dialable Directory Numb
27、er Parameter. 12 5.2.5.4.3.4 MDMF Reason for Absence of Directory Number Parameter 12 5.2.5.4.3.5 MDMF Calling Name Parameter 13 5.2.5.4.3.6 MDMF Reason for Absence of Calling Name Parameter 13 5.2.5.4.3.7 MDMF Call Qualifier Parameter 14 5.2.5.4.3.8 Reason for Redirection Parameter (Reserved) 14 5.
28、2.5.5 Visual Message Waiting Indicator 14 5.2.5.5.1 SDMF VMWI Message 14 5.2.5.5.2 MDMF VMWI Parameter. 15 5.2.5.6 Mark Bits. 16 5.2.5.7 Checksum 16 5.2.5.8 Markout . 16 5.2.6 Exception Handling. 16 5.2.6.1 Checksum Error 16 5.2.6.2 No Data Detected 16 5.2.6.3 Out of Range Data 16 TIA-777-A ii 5.3 P
29、HYSICAL LINE INTERFACE . 17 5.3.1 FSK Signal Properties17 5.3.1.1 Frequency 17 5.3.1.2 Signal Levels 17 5.3.1.3 Type 1 FSK Signal Level Detection Threshold 17 5.3.1.4 FSK Twist 17 5.3.1.5 Baud Rate 18 5.3.2 Impairments .18 5.3.2.1 Single Tone Metallic Noise during FSK 18 5.3.2.2 Single Tone Metallic
30、 Noise before and after FSK. 19 5.3.2.3 Type 1 - Echo Noise . 19 5.3.2.4 Signal Dropouts During Channel Seizure 19 5.3.2.5 Immunity to DC Shifts, Open Switching Intervals (OSIs), and Line Reversals 20 5.3.3 Type 1 DC Operating Conditions 20 5.3.4 Test Matrix for the FSK Signal Properties, Including
31、Multiple Impairments .20 6 TYPE 2 PROTOCOL. 28 6.1 GENERAL .28 6.1.1 Type 2 CPE28 6.2 FUNCTIONALITY . 28 6.2.1 Type 2 Call Waiting Caller ID.28 6.2.2 CAS Detection .28 6.2.2.1 CAS Detector Performance Requirements . 29 6.2.2.2 CAS Recognition 29 6.2.2.2.1 CAS Recognition Parameters 29 6.2.2.2.2 CAS
32、Recognition Test Matrix . 30 6.2.2.3 Talkdown Performance Parameters. 34 6.2.2.4 Talkoff Performance Parameters 35 6.2.2.5 CAS Check Muting. 35 6.2.3 CAS-ACK Handshake .36 6.2.3.1 Line and CPE States 36 6.2.3.2 CAS-ACK Handshake Protocol 36 6.2.3.2.1 CAS-ACK Handshake with Extension In Use Check. 36
33、 6.2.3.2.2 CAS-ACK Handshake Without an Extension in Use Check 38 6.2.3.3 ACK Signal Generation. 39 6.2.3.4 Voicepath Mute Control 39 6.3 TYPE 2 MARK SIGNAL. 40 6.4 PHYSICAL LINE INTERFACE . 40 6.4.1 FSK Signal Properties40 6.4.1.1 Frequency 40 6.4.1.2 Type 2 FSK Signal Level Detection Threshold 40
34、6.4.1.3 FSK Twist 40 6.4.1.4 Baud Rate 41 6.4.2 Impairments .41 6.4.2.1 Single Tone Metallic Noise 41 6.4.2.2 Immunity To DC Shifts, Open Switching Intervals (OSIs), and Line Reversals. 42 6.4.3 TYPE 2 DC Operating Range42 6.4.4 Test Matrix for the FSK Signal Properties, Including Multiple Impairmen
35、ts .42 7 TYPE 2.5 PROTOCOL 50 TIA-777-A iii 7.1 GENERAL . 51 7.1.1 Type 2.5 CPE 51 7.2 FUNCTIONALITY . 51 7.2.1 Type 2.5 Call Waiting Caller ID with Disposition 51 7.2.2 CWD Options 51 7.2.2.1 Answer 51 7.2.2.2 Hold . 51 7.2.2.2.1 Hold Return. 51 7.2.2.2.2 Hold Drop. 51 7.2.2.2.3 Conference 51 7.2.2
36、.3 Forward . 51 7.2.2.4 Announcement . 51 7.2.2.5 Drop . 51 7.2.2.6 Conference. 52 7.2.2.6.1 Drop First 52 7.2.2.6.2 Drop Last 52 7.2.3 CWD Option Signals. 52 7.2.3.1 CWD Flash Signal 52 7.2.3.2 CWD DTMF Signal 52 7.2.3.3 CWD Option Signal Timing. 52 7.2.4 Voicepath Mute Control During CWD Option Si
37、gnaling. 53 8 ADJUNCT SERIES IMPEDANCE REQUIREMENTS. 54 8.1 AC IMPEDANCE 54 8.2 DC RESISTANCE . 54 ANNEX A INFORMATIVE REFERENCES . 55 ANNEX B INFORMATIVE METHOD FOR RTF INTER-CPE SIGNALING . 56 1.1 INTER-CPE SIGNALING . 56 1.1.1 Request-to-Flash Signaling . 56 1.1.1.1 Request-to-Flash Signal Genera
38、tion 56 1.1.1.2 Request-to-Flash Signal Detection and Response . 58 ANNEX C EXAMPLE FSK MESSAGES . 60 ANNEX D EXAMPLES OF STEP-LIKE VOLTAGE CHANGES 62 TIA-777-A iv LIST OF FIGURES Figure 1 Timing for FSK following Power Ringing 5 Figure 2 SDMF and MDMF Formats 7 Figure 3 - SDMF Calling Number. 9 Fig
39、ure 4 - MDMF Date and Time Parameter 11 Figure 5 - MDMF Calling Number Parameter 11 Figure 6 - DDN Parameter 12 Figure 7 - MDMF Reason for Absence of Directory Number Parameter . 13 Figure 8 - MDMF Calling Name Parameter 13 Figure 9 - MDMF Reason for Absence of Calling Name Parameter 14 Figure 10 -
40、MDMF Call Qualifier Parameter 14 Figure 11 - SDMF Visual Message Waiting Indicator Message 15 Figure 12 - MDMF Visual Message Waiting Indicator Parameter. 15 Figure 13 CAS-ACK Handshake Diagram with EIU Check 38 Figure 14 CAS-ACK Handshake Diagram Without EIU Check. 39 Figure 15 - CWD State Diagram
41、. 53 Figure 16 - CWD Signaling Timing Diagram . 54 Figure 17 - CPE State Generating RTF, Multiple CPE Off-Hook, Successful Synchronized Flash. 56 Figure 18 - Line State During RTF, Multiple CPE Off-Hook, Successful Synchronized Flash. 57 Figure 19 - Line State During RTF, Single CPE Off-Hook 57 Figu
42、re 20 - CPE State Generating RTF, Multiple CPE Off-Hook, and Unsuccessful RTF. 57 Figure 21 - Line State During RTF, Multiple CPE Off-Hook, and Unsuccessful RTF. 58 Figure 22 - CPE State Detecting & Responding to an RTF, Successful Synchronized Flash 58 Figure 23 - Line State During RTF, Multiple CP
43、E Off-Hook, Successful Synchronized Flash. 58 Figure 24 - CPE State Detecting & Responding to an RTF, Unsuccessful RTF 59 Figure 25 - Line State During RTF, Multiple CPE Off-Hook, Unsuccessful RTF. 59 TIA-777-A v LIST OF TABLES Table 1 - Message Type Values 7 Table 2 - Parameter Type Values. 10 Tabl
44、e 3 - Type 1 FSK Positive Twist Acceptance Values. 17 Table 4 - Type 1 FSK Negative Twist Acceptance Values . 18 Table 5 - Type 1 Single Tone Noise Requirements 19 Table 6 - Group A, Variable Level Sensitivity Tests Type 1 21 Table 7 - Group B, Twist Test - Nominal Otherwise Types 1 21 Table 8 - Gro
45、up C, Combined Impairments - Frequencies, Baud, and Twist Type 1 21 Table 9 - Group D, (Noise applied from end of ring to 200 ms after end of FSK). 24 Table 10 - Group E, Noise Tests Type 1 (Noise applied during FSK only) . 25 Table 11 - Group F, Noise Tests Type 1 with +10 dB FSK Twist 26 Table 12
46、- Group G, Noise Tests Type 1 with 6 dB FSK Twist 27 Table 13 Group H, Echo Noise Type 1 27 Table 14 - Group I, Send without Ringing-Shall Reject Calls Type 1 . 28 Table 15 - CAS Parameter Limits 30 Table 16 - Group 1, CAS Recognition - All Parameters at Nominal Values . 31 Table 17 - Group 2, CAS R
47、ecognition - One Parameter at a Time at the Extreme Value . 31 Table 18 - Group 3, CAS Recognition - Parameters at 90% from Nominal, 76 ms CAS 32 Table 19 - Group 3, CAS Recognition - Parameters at 90% from Nominal, 84 ms CAS 33 Table 20 - Group 4, CAS Reject Amplitude . 34 Table 21 - Type 2 FSK Pos
48、itive Twist Acceptance Values. 41 Table 22 - Type 2 FSK Negative Twist Acceptance Values . 41 Table 23 - Type 2 Single Tone Noise Requirements 42 Table 24 - Group A, Variable Level Sensitivity Tests Type 2 43 Table 25 - Group B, Twist Test - Nominal Otherwise Type 2 43 Table 26 - Group C, Combined I
49、mpairments - Frequencies, Baud, and Twist Type 2. 44 Table 27 - Group D, Noise applied from end of ACK to 200 ms after end of FSK Type 2 47 Table 28 - Group E, Noise Tests Type 2 (Noise on during FSK only) 48 Table 29 - Group F, Noise Tests Type 2 with +10 dB FSK Twist 49 Table 30 - Group G, Noise Tests Type 2 with 6 dB FSK Twist 50 TIA-777-A vi FOREWORD (This foreword is not part of this standard.) This document is a TIA/EIA Telecommunications standard produced by Working Group TR-41.3.1 of Committee TR-41. This standard was developed in accordan
