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參數(shù)資料
| 型號： | MH89793 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | E1 Line Interface Unit (LIU) with Selectable Impedance(帶可選阻抗的E1線接口單元（LIU）) |
| 中文描述： | E1線路接口單元（劉）與可選阻抗（帶可選阻抗的素E1線接口單元（劉）） |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 27K |
| 代理商： | MH89793 |
4-1
Single +5V operation
SeeMT9075
Features
Complete primary rate 2048kbit/s E1 line driver
and receiver with clock recovery
Meets ETSI requirements [ETSI ETS 300 011,
NET 5]
Built-in selectable termination impedance
(120
/75
)
Onboard pulse transformers for transmit and
receive
No external crystal required for clock recovery
Loss of signal indication
Compatible with MT8979, MT9079 and other E1
Framers
Applications
Primary rate ISDN network Interfaces
Multiplexer equipment
E1 Digital Loop Carrier (DLC) equipment
Digital Cross-connect Systems (DCS)
Description
The Mitel MH89793 is an E1 Line Interface Unit (LIU)
designed to meet the requirements of G.703 2048
kbits/s transmission. It incorporates all of the analog
front-end
components
necessary
complete,
fully
compliant
termination. These include, clock extractor, line
driver/receiver, impedance matching resistors, and
line transformers. The device is suitable for both
120
and 75
applications, by external hardwire
control. No external components, such as crystals,
inductors or transformers are required. An external
clock reference is also not required.
to
realize
E1
a
short-haul
analog
The MH89793 is compatible with the Mitel MT8979
and MT9079 E1 digital framers, as well as other
commercially available E1 framers. The MH89793
requires only a single 5 volt supply.
Figure 1 - Functional Block Diagram
TLA
TLB
RLA
RLB
V
DD
V
SS
Line
Driver
Transmit
Isolation
Transformer
6dB
Pad
LINE SIDE
EQUIPMENT SIDE
RxA
RxB
E2o
E2oP
RxD
LOSP
RxP
TxA
TxB
Receive
Isolation
Transformer
Line
Receiver
LOS
Clock
Recovery
TZA1
TZA2 TZA3
TZB1
TZB2 TZC1 TZC2 TZD1 TZD2
RZA
RZB
DS5419
ISSUE 2
June 1996
Ordering Information
MH89793 28 Pin DIL Package
0
°
C to +70
°
C
MH89793
E1 Line Interface Unit (LIU)
with Selectable Impedance
Preliminary Information
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