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-
-
-
- CPE INTERFACE REQUIREMENTS FOR
- SINGLE-STAGE INBAND ANI DELIVERY
-
- 018-0035-01.1F-ER
-
- MCI
- NETWORK ARCHITECTURE AND REQUIREMENTS ENGINEERING
- NETWORK STANDARDS AND ARCHITECTURE ENGINEERING
-
-
- August 8, 1989
-
- Revision 1.1
-
- *** FINAL ***
-
-
-
-
-
- Copyright MCI COMMUNICATIONS CORPORATION 1989
- PROPRIETARY INFORMATION OF
- MCI TELECOMMUNICATIONS
-
-
-
-
-
- Network Standards and Architecture Engineering
- 018-0035-01.1F-ER
-
-
- REVISION HISTORY
-
- REV DATE AUTHOR REASON FOR CHANGE
-
- 1.0 6/6/89 A. Patel Draft
- A. Merchant
-
- 1.1 8/8/89 A. Patel Final
- A. Merchant
-
-
-
- PROPRIETARY INFORMATION OF
- MCI TELECOMMUNICATIONS
-
-
- TABLE OF CONTENTS
-
- SECTION PAGE
-
- 1.0 Introduction 1-1
-
- 2.0 Overview 2-1
- 2.1 ANI Applications 2-2
-
- 3.0 Terminology 3-1
-
- 4.0 Signaling Sequence 4-1
- 4.1 ANI Delivery Using MF Signaling 4-1
- 4.2 ANI Delivery Using DTMF Signaling 4-3
-
- 5.0 Timing, Tolerances and Restrictions 5-1
- 5.1 Hook Flash 5-1
- 5.2 Hits 5-1
- 5.3 Wink Start Operation 5-1
- 5.3.1 Wink Start Guard 5-2
- 5.4 Answer 5-2
- 5.5 Incomplete Calls 5-2
- 5.6 Glare Resolution 5-2
- 5.7 Register Signaling 5-3
- 5.7.1 MF Characteristics 5-4
- 5.7.2 DTMF Characteristics 5-6
- 5.8 Audible Signals 5-8
- 5.9 Disconnect 5-8
- 5.9.1 Busy Guard Time 5-8
-
-
-
- LIST OF FIGURES
-
- FIGURE TITLE PAGE
-
- 4-1 ANI Delivery Using MF Signaling 4-2
- 4-2 ANI Delivery Using DTMF Signaling 4-4
-
-
- LIST OF TABLES
-
- TABLE TITLE PAGE
-
- 5-1 MF Characteristics 5-4
- 5-2 DTMF Characteristics 5-6
-
-
- 1.0 INTRODUCTION
-
- This document addresses the technical requirements for PBX/ACD
- vendors who wish to interface with MCI switches to receive ANI.
- Delivery of this ANI between the MCI terminating switch and the
- Customer Premise Equipment (CPE) will be inband, and will be
- supported on dedicated/hard-wired terminations only.
-
- 2.0 OVERVIEW
-
- Automatic Number Identification (ANI) relates to the identification
- of the telephone number of the calling party at the premise of the
- called party. This document specifies the technical requirements
- necessary for the interface between the MCI terminating switch and
- the CPE.
-
- Initially, MCI will deliver real time ANI for 800 and 900 service
- calls to the CPE of the called party over dedicated trunks. The
- terminating switch will outpulse this ANI to the CPE using a
- single-stage signaling sequence. See Section 4.0 for details.
-
- It should also be noted that:
-
- (1) If a call originates in a foreign country, no ANI or
- originating country code will be delivered to the PBX/ACD.
-
- (2) If a 800/900 call overflows to an LEC network for call
- completion, no ANI will be delivered to the terminating LEC and
- PBX/ACD.
-
- (3) If the MCI switch does not receive the full 10-digit ANI from
- the LEC, i.e. if the call originates from a non-conforming end
- office, then the Originating NPA + 555 - 5555 will be outpulsed to
- the CPE.
-
- If a specific customer subscribes for the real time ANI feature,
- ANI will be delivered to the actual termination of that call. In
- order to receive the ANI, customers need to ensure that all
- possible dedicated trunks and terminating PBX/ACDs, as specified in
- the routing control, are equipped with ANI receiving and processing
- capabilities.
-
- 2.1 ANI Applications
-
- Some of the current and potential applications are:
-
- (1) Telemarketing: This generic term includes locating dealer,
- customer service and order taking.
-
- (2) Financial services: This is a particularly large application
- including customer service, automated balance/credit inquiry,
- financial information retrieval and funds transfer.
-
- (3) Home Shopping: ANI could be used as an identifier to recover
- the called party profile and appropriately route the call. Payment
- records could be checked.
-
- However, a few important limitations must be noted at this point.
-
- (1) As pointed out earlier, ANI cannot be delivered for calls
- originating from non-conforming end offices.
-
- (2) A customer could originate a call from a telephone with a
- number different from that customer's home or office telephone
- number. Hence no check of the customer's record can be performed
- in this case.
-
- 3.0 TERMINOLOGY
-
- The following abbreviations, acronyms and terms have been used
- throughout this document.
-
- ( ) Digits in parenthesis may or may not have been
- dialled or outpulsed.
- 3/10 3 or 10 digits.
- ACD Automatic Call Distributor.
- ANI Automatic Number Identification.
- CPE Customer Premise Equipment.
- DTMF Dual Tone Multi Frequency.
- KP Start Digit (Key Pulse).
- LEC Local Exchange Carrier.
- MF Multi Frequency.
- NPA Numbering Plan Area
- ST Stop digit.
- TLP Transmission Level Point.
-
- 4.0 SIGNALING SEQUENCE
-
- This section describes the signaling sequence for the interface
- between the terminating MCI switch and the CPE. Real time ANI will
- be delivered to the 800/900 Service customer during the call setup
- process.
-
-
- 4.1 ANI Delivery Using MF Signaling
-
- If the MCI switch determines that ANI is to be delivered for a
- particular call, the switch will perform single-stage signaling as
- specified below. Refer to Fig. 4-1 on page 4-2.
-
- A. The MCI terminating switch will seize a trunk to the CPE.
-
- B. The CPE shall respond to the trunk seizure with a wink start
- signal when ready to receive pulsing.
-
- C. On receipt of the wink start signal from the CPE, the MCI
- switch will outpulse the 10 digit ANI (KP + 10D ANI + ST).
-
- D. If ANI is not received, the switch will outpulse
- KP + NPA + 555 - 5555 + ST.
-
- E. When the telephone/terminal answers, an answer off hook signal
- shall be sent from the CPE to the MCI terminating switch.
-
- F. The MCI switch will cut through the voice path when it
- receives an answer off hook from the CPE.
-
- G. If the CPE transmits an on-hook towards MCI for at least 350
- ms, the call will be disconnected. Similarly, the MCI switch
- may disconnect the call by transmitting an on-hook for at
- least 350 ms.
-
- *Note: If the MCI switch does not receive the ANI digits from the
- LEC, the switch will outpulse KP + Originating NPA + 555 -
- 5555 + ST to the CPE using MF Signaling.
-
-
- Figure 4-1
-
- ANI DELIVERY USING MF SIGNALING
-
-
- 4.2 ANI Delivery Using DTMF Signaling
-
- If the MCI switch determines that ANI is to be delivered for a
- particular call, the switch will perform single-stage signaling as
- specified below. Refer to Fig. 4-2 on page 4-X.
-
- A. The MCI terminating switch will seize a trunk to the CPE.
-
- B. The CPE shall respond to the trunk seizure with a wink start
- signal when ready to receive pulsing.
-
- C. On receipt of the wink start signal from the CPE, the MCI
- switch will outpulse the 10 digit ANI.
-
- D. If ANI is not received, the switch will outpulse NPA + 555 -
- 5555.
-
- E. When the telephone/terminal answers, an answer off hook signal
- shall be sent from the CPE to the MCI terminating switch.
-
- F. The MCI switch will cut through the voice path when it
- receives an answer off hook from the CPE.
-
- G. If the CPE transmits an on-hook towards MCI for at least 350
- ms, the call shall be disconnected. Similarly, the MCI switch
- may disconnect the call by transmitting an on-hook for at
- least 350 ms.
-
- *Note: If the MCI switch does not receive the ANI digits from the
- LEC, the switch will outpulse the Originating NPA + 555 -
- 5555 to the CPE using DTMF Signaling.
-
-
- Figure 4-2
-
- ANI DELIVERY USING DTMF SIGNALING
-
- 5.0 TIMING, TOLERANCES AND RESTRICTIONS
-
- This sections describes the timing, tolerances and restrictions
- that are applicable to the MCI switch/CPE interface.
-
-
- 5.1 Hook Flash
-
- Hook flashes shall not be passed to the MCI switch. All hook flash
- timing shall be handled internally by the CPE.
-
-
- 5.2 Hits
-
- A short change in the received supervisory state is called a hit.
- All hits shall be ignored. A hit may be on hook or off hook and is
- dependant on conditions as specified below:
-
- A. The CPE shall interpret an off hook of less than 150 ms as a
- hit and not a seizure signal.
-
- B. The MCI switch will interpret an off hook of less than 70 ms
- as a hit and not a wink start signal.
-
- C. An on hook duration of less than 200 ms shall be interpreted
- as a hit.
-
-
- 5.3 Wink Start Operation
-
- The off hook wink (wink start) shall be sent as soon as the CPE
- detects a seizure signal. The CPE shall return the wink start
- signal within 3.5 seconds of the trunk seizure. However, it shall
- not be provided earlier than 100 ms after receiving the seizure
- signal. The off-hook period shall be a minimum of 140 ms and
- maximum of 290 ms. The MCI switch will interpret an off hook
- signal in the range of 100 ms to 350 ms as a wink signal. If the
- MCI switch receives an off hook signal lasting over 350 ms on a two
- way trunk, a glare condition will be interpreted. Glare resolution
- is discussed in Section 5.6.
-
-
- 5.3.1 Wink Start Guard
-
- The CPE must be prepared to receive Multi Frequency (MF) or Dual
- Tone Multi Frequency (DTMF) digits 35 ms after the end of the wink-
- start signal. The MCI switch will wait for 50 ms after the end of
- the wink-start signal before initiating the MF or DTMF pulsing.
- Characteristics of these signals are defined in Section 5.7.
-
-
- 5.4 Answer
-
- The CPE shall provide a steady off-hook state indicating called
- party answer.
-
-
- 5.5 Incomplete Calls
-
- If a time out occurs while waiting for a response from the CPE, the
- MCI switch shall treat the call as follows. If the CPE responds to
- seizure on a trunk with an off-hook longer than 350 ms instead of a
- wink-start signal, a false answer condition is indicated. The MCI
- switch shall try to set up another call using a different circuit
- within the same trunk group. If an idle circuit is not available,
- the switch will try to set up the call on a different trunk group,
- failing which all other routes shall be tried. If all of the above
- fail, the MCI switch shall disconnect the call and return a reorder
- towards the calling party.
-
-
- 5.6 Glare Resolution
-
- Glare is a condition resulting from seizure attempts for the same
- two way access line at about the same time by both the MCI switch
- and the CPE. If the returned off hook lasts longer than 350 ms
- instead of a wink start signal, a glare condition will be
- interpreted.
-
- The MCI switch will always be the controlling end when a glare is
- detected. The CPE shall maintain the outgoing off hook state while
- preparing for reception of address signals from the MCI switch.
- When ready to receive digits, the outgoing off hook signal shall be
- changed to on hook. The outgoing call initiated by the CPE shall
- be re-tried on another trunk.
-
-
- 5.7 Register Signaling
-
- The MCI switch supports the following two types of address
- signalling to deliver ANI.
-
- A. Multi Frequency (MF); and
- B. Dual Tone Multi Frequency (DTMF).
-
- 5.7.1 MF Characteristics
-
- One of the two types of address signaling that the MCI switch will
- support is the Multi Frequency (MF) type. Conformity with the
- criteria indicated in this subsection will ensure compatibility of
- the signals between the MCI switch and the CPE.
-
- The MF pulsing system consists of transmitting and receiving
- various combinations of two, and only two, out of five frequencies
- in the voice band. Each combination of two frequencies represents
- a pulse and each pulse represents a digit. This system provides
- sufficient unique combinations to encode 10 digits. A sixth
- frequency is provided for additional control signals. Table 5-1
- identifies the signaling codes.
-
-
-
-
- Digits Frequencies
- (Hz)
- 1
- 2 700 + 900
- 3 700 + 1100
- 4 900 + 1100
- 5 700 + 1300
- 6 900 + 1300
- 7 1100 + 1300
- 8 700 + 1500
- 9 900 + 1500
- 0 1100 + 1500
- KP 1300 + 1500
- ST 1100 + 1700
- Not Used 1500 + 1700
- Not Used 700 + 1700
- Not Used 900 + 1700
- 1300 + 1700
-
-
-
- Table 5-1
-
- MF CHARACTERISTICS
-
-
- 5.7.1.1 MF Sender Characteristics
-
- The CPE MF sender shall have the following characteristics.
-
- A. KP digit duration shall be: 90-120 ms.
-
- B. All other digit duration shall be: 58-75 ms.
-
- C. Inter digit duration shall be: 58-75 ms.
-
- D. Frequency accuracy shall be within: + 1.5% of
- nominal.
-
- E. The two frequencies of each code shall start and end within: 1
- ms (of each other).
-
- F. Power output per frequency: -7 +1 dBm at 0 dB TLP.
-
- G. Power difference between the two frequencies shall not exceed:
- 1 dB.
-
- H. The total power of extraneous signal components shall be
- suppressed to: at least 30 dB below the power level.
-
-
-
- 5.7.1.2 MF Receiver Characteristics
-
- The CPE MF receiver shall have the following characteristics.
-
- A. KP digit signal duration shall be: 55 ms.
-
- B. Digit duration shall be: 30 ms (min.).
-
- C. Inter digit duration shall be: 25 ms (min.).
-
- D. Frequency accuracy shall be within: +(1.5% + 5 Hz) of
- nominal.
-
- E. The two frequencies of each code shall start and end within: 4
- ms (of each other).
-
- F. The receiver shall accept tones within the power levels of: 0
- to -25 dBm.
- (per frequency).
-
- G. Power difference between the two frequencies shall not exceed:
- 6 dB.
-
-
- 5.7.2 DTMF Characteristics
-
- The second type of address signaling that the MCI switch will
- support is the Dual Tone Multi Frequency (DTMF) type. Conformity
- with the criteria indicated in this subsection will ensure
- compatibility of the signals between the MCI switch and the CPE.
-
- The DTMF provides for 16 unique signals. Each signal is composed
- of two voice band frequencies, one from each of two mutually
- exclusive frequency groups consisting of four frequencies each.
- Table 5-2 identifies the signaling codes.
-
-
- HIGH-GROUP FREQUENCIES (Hz)
-
- 1209 1336 1477 1633
-
- 697 1 2 3 Not Used
- LOW
- 770 4 5 6 Not Used
- GROUP
- 852 7 8 9 Not Used
- FREQUENCIES
- 941 * 0 # Not Used
-
-
- Table 5-2
-
- DTMF CHARACTERISTICS
-
- 5.7.2.1 DTMF Sender Characteristics
-
- The CPE DTMF sender shall have the following characteristics.
-
- A. Digit duration shall be: 50 ms.
-
- B. Inter digit duration shall be at least: 50 ms.
-
- C. Time period (cycle time) shall be at least: 100 ms.
-
- D. Frequency accuracy shall be within: + 1.5% of
- nominal.
-
- E. Power output per frequency: -7 +0.5 dBm at 0
- dB TLP.
-
- F. The total power of extraneous signal components shall be
- suppressed to: at least 30 dB
- below the power level.
-
-
-
- 5.7.2.2 DTMF Receiver Characteristics
-
- The CPE DTMF receiver shall have the following characteristics.
-
- A. Digit duration shall be: 50 ms.
-
- B. Inter digit duration shall be at least: 50 ms.
-
- C. Time period (cycle time) shall be at least: 100 ms.
-
- D. Frequency accuracy shall be within: + 1.5% of
- nominal.
-
- E. Power output per frequency: -7 +0.5 dBm at 0
- dB TLP.
-
- F. The receiver shall accept tones within the power levels of: 0
- to -25 dBm.
-
-
- 5.8 Audible Signals
-
- The audible call progress tones provided by MCI will have the
- following characteristics:
-
- A. Busy Tone: 480 Hz plus 620 Hz interrupted at 60 IPM
- at a level of -24 dBmO per frequency.
-
- B. Reorder Tone (Fast Busy): 480 Hz plus 620 Hz interrupted at 120
- IPM at a level of -24 dBmO per frequency.
-
- C. Ringback Tone: 440 Hz plus 480 Hz (two seconds on, four
- seconds off) at a level of -19 dBmO per
- frequency.
-
-
-
- 5.9 Disconnect
-
- To disconnect a call the MCI switch will transmit an on hook
- towards the CPE for at least 350 ms. Conversely, the CPE may
- disconnect a call by transmitting an on hook towards the switch for
- at least 350 ms.
-
-
-
- 5.9.1 Busy Guard Time
-
- The timed interval used to ensure trunk release before re-seizure
- is called the guard time. The trunk shall be held busy for that
- 300 ms interval and the station shall not accept an incoming call.
-
-
-
- ###
-