Huawei SmartAX MA5608T User Manual

Clock/Time Synchronization Solution
Figure 14-1 shows a clock/time synchronization solution in base station access network. The
clock/time synchronization principle is as follows: The clock obtained by the OLT serves as the
clock source and transmits signals to the base station through xPON lines.
Figure 14-1 Clock/Time synchronization solution in base station access network
Clock
output by
PON
board
SPUA
GSCA/X2CS
/GICK
TOPA card
BITSB port
PLL
CKMC
SCU card
(active)
CITD
Line clock
source
2MHz,2Mb/s
1PPS+TOD
BITS_IN1
BITS_IN0
System PLL
Clock output
ONU
Sync-ETH
1PPS+TOD
BITS
E1
OLT
Base
station
EDTB card
S
e
l
e
c
t
o
r
S
e
l
e
c
t
o
r
The figure shows that the OLT can obtain the following clock sources:
l BITS clock source
l E1/STM-1/T1 line clock source
l Synchronous Ethernet line clock
l "1PPS+ToD" time injection
l End-to-end 1588v2 clock source
l Internal clock sources are not recommended because they are in free oscillation state and
do not have advantages in precision.
Comparison of Clock/Time Synchronization Solution
Table 14-2 shows a clock synchronization solution in base station access network.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide 14 FTTM Configuration (Base Station Access)
Issue 01 (2014-04-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1377

Huawei SmartAX MA5608T Specifications

General

Dual Power Supply	Yes
Humidity	5% to 95% (non-condensing)
Uplink Slots	2
Maximum GPON Ports	16
Input Voltage Range	-38.4 V DC to -72 V DC
Device Type	OLT
Power Supply	-48 V DC
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to 70°C
Switching Capacity	128 Gbps
Ports	GPON, XG-PON, 10GE