ZTE Corporation ZXG-OB06 Manuale Utente
Chapter 3 - Interfaces and Communications
Confidential and Proprietary Information of ZTE CORPORATION 31
After CMM is powered on, it reads the ID signal to locate the position of
the O&M TS. The base cabinet generates and outputs FN and SYNCLK
while the extension cabinet receives them. The cabinet category is read by
while the extension cabinet receives them. The cabinet category is read by
the CMM from the cabinet top ID signal.
The inter-cabinet FN will be transmitted and broadcasted through the
HDLC protocol, the inter-cabinet O&M TS through the HDLC protocol and
HDLC protocol, the inter-cabinet O&M TS through the HDLC protocol and
inter-cabinet communication (CC_COM) through the HDLC protocol.
Details are introduced as follows:
Details are introduced as follows:
In the downlink direction, the CMM will transparently switch the O&M
timeslot of the Abis interface to the processor of this board and other
timeslot of the Abis interface to the processor of this board and other
cabinets of the same site. The CMM will identify the O&M according to TEI.
Upstream, CMM compresses the O&M TSs of this cabinet and the next
cabinet to send to the upper-level CMM. Thus, the base cabinet
compresses the O&M messages of three cabinets into one O&M message
to report to BSC.
compresses the O&M messages of three cabinets into one O&M message
to report to BSC.
Interfaces of the Tower Amplifier System
The interfaces of the tower amplifier system must be reserved during
installation of the tower amplifier for OB06, including the power interface
and the alarm interface of the tower amplifier. In general, they are
installation of the tower amplifier for OB06, including the power interface
and the alarm interface of the tower amplifier. In general, they are
interfaces for providing the DC feed and alarm monitoring, and the alarm
is detected from the DC current.
is detected from the DC current.
OB06 can provide +12 V power supply and up to 300 mA current for the
tower amplifier system through the power interface.
tower amplifier system through the power interface.
The tower amplifier alarm is accessed to the backbone node in the OB06
through the backbone node alarm mode, and it is monitored by the OB06.
through the backbone node alarm mode, and it is monitored by the OB06.
When two lines of the backbone node in OB06 are connected or connected
at a low resistance, it indicates there is alarm output for the tower
amplifier, and Alarm is ON. When two lines of the backbone node in OB06
at a low resistance, it indicates there is alarm output for the tower
amplifier, and Alarm is ON. When two lines of the backbone node in OB06
are not connected or connected at a high resistance, it indicates there is
no alarm output for the tower amplifier, and Alarm is OFF.
no alarm output for the tower amplifier, and Alarm is OFF.
The tower amplifier power interface is located on the cabinet top, and one
OB06 cabinet can provide 3 tower amplifier power interfaces.
OB06 cabinet can provide 3 tower amplifier power interfaces.
Man-Machine Interface (MMI)
The MMI is a serial communication interface between the OB06 and local
O&M terminal.
It is realized by the 10-BaseT network interface or RS 232 interface
between the CMM and local O&M terminal.
It can be connected to the serial interface of a local O&M terminal
computer or network interface through the ETP interface of the CMM panel.