Cellular Phone - CMT3000 Software Modification
GROUP 65Radio & Special Equipment
Bulletin Number
65 07 95 (4247)
Woodcliff Lake, NJ
Nov. 1995
Product Engineering
This Service Information bulletin supersedes S.I. 65 07 95 (4247), dated August 1995. It corrects all invalid operating sequence. Please remove and discard S.I. 65 07 95 (4247) dated August 1995 from your S.I. binder.
SUBJECT:
CMT3000 Telephone - Linked Sequences
MODELS:
7 Series (E38)
General Modified software is available to make it easier for the customer to send linked Information: sequences from the CMT3000 Telephone (refer to Service Information Bulletin 65 06 95 [4239]).
Please ensure that all members of your Sales and Service Departments are thoroughly familiar with the specific details of programming and sending linked sequences. It is important that the customer understand what can and cannot be done with linked sequences in the CMT3000 Telephone.
What is a Linked Sequence?
A linked sequence can be created by the customer by storing a sequence of numbers (separated into groups by pauses) into a single memory location. Up to a maximum of 32 digits and/or spaces can be stored in one memory location.
When the linked sequence is recalled and sent, the telephone will stop transmitting at each pause, and will only transmit the next group of numbers at the customer's direction.
Linked sequences are useful when accessing such devices or services as answering machines or voicemail, as access codes or PINs can be transmitted with the push of a button when called for by the device or service.
Certain limitations apply to the type of linked sequence which can be sent. Because of an increase in cellular phone fraud, some cellular service providers have recently instituted programs that require the use of a Personal Identification Number (PIN) to place calls. Depending on the type of PIN system in use by the provider, it may not be possible to include a PIN in a linked sequence.
Important Note:
Cellular service providers fall into three categories:
1. Provider requires no PIN.
2. Provider requires that PIN be entered only at initial power-up of phone.
3. Provider requires that PIN be sent at every call.
It is for this third category that the use of linked sequences proves useful.
Examples of Linked Sequences Using the Handset
1. Calling and accessing a voicemail service could be done with a linked sequence similar to the following:
The customer stores the following sequence into a memory location: 2015555555 "123" 4567
Here, the """symbol indicates a pause separating the groups of numbers. This is programmed into the sequence by pressing "FCN," "SND." When this sequence is recalled from a memory location and the "SND" button is pressed, the phone number "(201) 555-5555" is dialed. The CMT3000 then waits to dial the second set of numbers. Once the voicemail service answers and asks for the extension number, the customer presses "RCL," "SND," and the extension number "123" is transmitted. When the voicemail service then asks for the password, the customer presses "RCL," "SND" again and the password "4567" is transmitted.
DTMF and CVCD
DTMF (Dual Tone Multi Frequency) refers to a method of sending numerical address information from a telephone by simultaneously sending a combination of two tones out of a group of eight.
CVCD (Cellular Voice Channel Data) refers to the data transmission from a cellular phone to a cell site that is recognized by the cellular system, and is distinct from DTMF tones.
In the above-mentioned example (using the handset), the cell site must receive CVCD data transmission to process the call, and the voicemail service must receive DTMF tones in order to operate correctly. Therefore, the sequence of transmissions is as follows:
^ Pressing the "SND" button results in CVCD transmission. The telephone number "(201) 555-5555", is sent to the cell site, which completes the connection.
^ Pressing "RCL," "SND" results in a DTMF transmission. The extension number "123" is sent through the cell site to the voicemail service, which can only process DTMF tones.
^ The Pressing "RCL" "SND" again results in another DTMF transmission. The password "4567" is sent through the cell site to the voicemail service, and the customer can now access messages.
^ The call is terminated by pressing "END."
2. Another use of a linked sequence is for storage of a Personal Identification Number (PIN) which has been assigned by the cellular provider as an anti-fraud measure, as follows:
The customer stores the following sequence into a memory location: 2015555555 "6789
Here, the """symbol again represents a pause, separating the phone number being called and the customer's PIN, "6789." The customer recalls the linked sequence and presses "SND." The CMT3000 dials the phone number "(201) 555-5555" and waits at the pause. When the request for the PIN is received, the customer presses "SND" again, and the CMT3000 then sends the PIN, "6789."
Note:
That in this example, "SND" (instead of "RCL", "SND") was pressed in order to send the second set of numbers. In this example, the sequence of transmissions is as follows:
^ Pressing the "SND" button the first time results in CVCD transmission. The telephone number "(201) 555-5555" is sent to the cell site, which completes the connection.
^ Pressing the "SND" button the second time also results in CVCD transmission. The PIN "6789" is sent to the cell site, which must receive the PIN in CVCD form in order to recognize it. If the PIN had been sent in DTMF form, the cell site would not have recognized it and therefore would not have completed the call.
Examples of Linked Sequences Using the Multi-Informational Display (MID) or Multi-Functional Steering Wheel (MFL)
1. Calling and accessing a voicemail service could be done with a linked sequence similar to the following:
The customer stores the following sequence into a memory location: 2015555555 "123" 4567
Again, the """ symbol indicates a pause separating the groups of numbers. When this sequence is recalled from a memory location and the Call Control button (on either the MID or the MFL) is pressed, the phone number "(201) 555-5555" is dialed. The CMT3000 then waits to dial the second set of numbers. Once the voicemail service answers and asks for the extension number, the customer presses the Call Control button again and the extension "123" is transmitted. When the voicemail service then asks for the password, the customer presses the Call Control button again and the password "4567" is transmitted.
In this example, the cell site must receive CVCD data transmission to process the call, and the voicemail service must receive DTMF tones in order to operate correctly. Therefore, the sequence of transmissions is as follows:
^ Pressing the Call Control button the first time results in CVCD transmission. The telephone number "(201) 555-5555" is sent to the cell site, which completes the connection.
^ Pressing the Call Control button the second time results in a DTMF transmission. The extension number "123" is sent through the cell site to the voicemail service, which can only process DTMF tones.
^ Pressing the Call Control button the third time results in another DTMF transmission. The password "4567" is sent through the cell site to the voicemail service, and the customer can now access messages, although the customer must use the handset to use the "*" " # ", and number keys as directed by the voicemail service.
^ The call is terminated by pressing the Call Control button again.
2. The use of a linked sequence for storage of a Personal Identification Number (PIN), assigned by the cellular provider as an anti-fraud measure, is not possible if using the MID or MFL to place the call, if the PIN is the type that must be transmitted after each call is sent. However, by inputting and sending the PIN at the handset, or by recalling the PIN from a memory location and A sending it from the handset, calls of this type can be initiated from the MID or MFL, as in the following example:
The customer stores the telephone number 2015555555 into memory location 01, and then stores the password 6789 into memory location 02 (this must be done from the handset).
The customer recalls memory location 01 (using the scroll buttons) and presses the Call Control button to send the call. The CMT3000 dials the phone number, "(201) 555-5555", and the customer is then prompted by the cellular service to transmit his or her PIN. When the request for the PIN is received, the customer must now do one of the following:
^ Send the PIN (for example, "6789") from the handset, by entering "6, 7, 8, SND"; or,
^ Recall and send the PIN from memory location 02 from the handset by entering "RCL, 02, SND".
Note:
That when using the Call Control button from either the MID or the MFL, the first transmission is always in CVCD form, and subsequent transmissions (within a linked sequence) are in DTMF form. Once the linked sequence is completed, the next activation of the Call Control button will end the call. The sequence of transmissions is as follows:
^ Pressing the Call Control button the first time results in CVCD transmission. The telephone number "(201) 555-5555," is sent to the cell site, which completes the connection.
^ Using the handset to enter "6789" results in CVCD transmission. The PIN "6789" is sent to the cell site, which must receive the PIN in CVCD form in order to recognize it. If the PIN had been sent in DTMF form, the cell site would not have recognized it and therefore would not have completed the call.
Summary of Transmission Sequences