Nortel Networks Option 11C 用户手册
NTAK20 clock controller
Page 511 of 544
External timing interface
The clock controller provides an external timing interface and can accept two
signals as timing references. An external reference is an auxiliary timing
clock which is bridged from a traffic carrying signal and is not intended to be
a dedicated non-traffic-bearing timing signal. The clock controller uses either
the external/auxiliary references or the DTI/PRI references.
signals as timing references. An external reference is an auxiliary timing
clock which is bridged from a traffic carrying signal and is not intended to be
a dedicated non-traffic-bearing timing signal. The clock controller uses either
the external/auxiliary references or the DTI/PRI references.
Hardware integrity and regulatory environment
The clock controller complies with the following hardware integrity and
regulatory specifications:
regulatory specifications:
EMI FCC part 15 sub- part J
CSA C108.8
CISPR publication 22
ESD IEC 801-2
Temperature IEC 68-2-1
IEC 68-2-2
IEC 68-2-14
Humidity IEC 68-2-3
Vibration/Shock IEC 68-2-6
IEC 68-2-7
IEC 68-2-29
IEC 68-2-31
IEC 68-2-32