參數(shù)資料
型號(hào)： MT88E45
廠商： Mitel Networks Corporation
英文描述： 4-Wire Calling Number Identification Circuit(4線主叫識(shí)別電路（接收傳送的物理層信號(hào)）)
中文描述： 4線主叫號(hào)碼識(shí)別電路（四線主叫識(shí)別電路（接收傳送的物理層信號(hào)））
文件頁(yè)數(shù)： 4/27頁(yè)
文件大小： 113K
代理商： MT88E45
MT88E45
Advance Information
4
Functional Overview
The MT88E45 is compatible with FSK and FSK plus
CAS (CPE Alerting Signal) based Caller ID services
around the world. Caller ID is the generic name for a
group of services offered by telephone operating
companies whereby information about the calling
party is delivered to the subscriber. In Europe and
some other countries Caller ID is known as Calling
Line Identity Presentation (CLIP). ETSI calls CAS
‘Dual Tone Alerting Signal’ (DT-AS), BT calls it ‘Tone
Alert Signal’.
Depending on the service, data delivery can occur
when the line is in the on-hook or off-hook state. In
most countries the data is modulated in either Bell
202 or CCITT V.23 FSK format and transmitted at
1200 baud from the serving end office to the
subscriber’s
terminal.
Additionally
signalling, the special dual tone CAS is used to alert
the terminal before FSK data transmission. BT uses
CAS to alert the terminal prior to FSK in both on-
hook (Idle State) and off-hook (Loop State)
signalling.
in
off-hook
In North America, Caller ID uses the voiceband data
transmission interface defined in the Bellcore
document GR-30-CORE. The terminal or CPE
(Customer Premises Equipment) requirements are
defined in Bellcore document SR-TSV-002476.
Typical services are CND (Calling Number Delivery),
Table 1 - CB0/1/2 Functionality
The number of control bits (CB) required to interface the MT88E45 with the microcontroller depends on the
functionality of the application, as shown in Table 2.
Table 2 - Control Bit Functionality Groups
CB0 CB1 CB2
FSK
Interface
Function
0/1
1
1
Set by CB0 FSK Demodulation. Tip/Ring input (GS1) selected. DR/STD is DR.
0/1
1
0
Set by CB0 Hybrid CAS Detection. Hybrid Receive input (GS2) selected. DR/STD is STD.
0/1
0
1
Set by CB0 Tip/Ring CAS Detection. Tip/Ring input (GS1) selected. DR/STD is STD.
When the line is off-hook, a Bellcore Multiple Extension Interworking (MEI)
compatible Type 2 CPE should be able to detect CAS from Tip/Ring while the
CPE is on-hook because it may be the ACK sender. Tip/Ring CAS detection is
also required for BT’s on-hook CLIP.
1
0
0
Mode 1
Power Down. The MT88E45 is disabled and draws virtually no power supply
current.
0
0
0
Mode 0
Reserved for factory testing.
Functionality Group
Controls
Description
FSK (mode 0 or 1) and
Hybrid CAS only
(Non MEI compatible)
CB2
CB0 is hardwired to Vdd or Vss to select the FSK
interface.
CB1 hardwired to Vdd.
The microcontroller uses CB2 to select between the 2
functions.
FSK (mode 0 or 1),
Hybrid CAS,
Tip/Ring CAS
(MEI compatible or BT on-hook CLIP)
CB1
CB2
CB0 is hardwired to Vdd or Vss to select the FSK
interface.
The microcontroller uses CB1 and CB2 to select between
the 3 functions.
FSK (mode 1),
Hybrid CAS,
Tip/Ring CAS,
Power Down
(MEI compatible or BT on-hook CLIP)
CB1
CB2
CB0 is hardwired to Vdd to select FSK interface mode 1.
The microcontroller uses CB1 and CB2 to select between
the 4 functions.
FSK (mode 0), Hybrid CAS,
Tip/Ring CAS, Power Down
(MEI compatible or BT on-hook CLIP)
CB0
CB1
CB2
All 3 pins are required.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT88E45AS 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:4-Wire Calling Number Identification Circuit 2(4-Wire CNIC2)
MT88E45B 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:4-Wire Calling Number Identification Circuit 2 (4-Wire CNIC2)
MT88E45BN 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:4-Wire Calling Number Identification Circuit 2
MT88E45BN1 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V 20SSOP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC CNIC CIDCW CID 20SSOP 制造商:Microsemi Corporation 功能描述:IC CNIC CIDCW CID 20SSOP
MT88E45BNR 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V 20SSOP - Tape and Reel
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