User guide

Radiance T3/E3 Single Interface Line Cards 11
Timing Paths
The transmit (TX) and receive (RX) paths are clocked independently and during
normal operation, the Radiance T3/E3 line cards are never timing masters of the
network system. In the coaxial to fiber path, timing is recovered by the card’s
LIU and transmitted over the fiber line to the remote T3/E3 line card. In the
fiber to coaxial path, timing is derived from the incoming optical signal and sent
over the coaxial TX line.
Local
T3/E3
Line Card
Remote
T3/E3
Line Card
Coaxial CoaxialFiber
A
F
C
B
ED
The following table describes how timing is affected if a failure occurs at
various points in the network.
eruliaFeniL
tnioP
tluseR
A
s'reviecerrebifehT.langisfossolstceteddracenil3E/3TlacolehT
.BknilrebifrevonoissimsnartrofecruosgnimitehtsemocebOXCV
B
kcolcecnereferstiotstreverOXCVs'dracenil3E/3TetomerehT
.retsamgnimitmetsysehtsemocebdrac3E/3TetomerehT.tupni
C
stroppusdracenil3E/3TetomerehtotdetcennoctnempiuqeehtfI
kcolclanretnistiottreverdluohstnempiuqeeht,gnimitdepool
liafdluoctnempiuqeeht,ylevitanretlA.langisfossolstcetedtinehw
fisaevaheblliwmetsysehtdna,kcolcrolangisdilavaedivorpot
.Dtnioptaderruccoeruliafeht
D
rebifehT.langisfossolstcetedUILs'drac3E/3TetomerehT
revonoissimsnartrofecruosgnimitehtsemocebOXCVs'reviecer
.Eknilrebif
E
kcolcecnereferstiotstreverOXCVs'dracenil3E/3TlacolehT
.retsamgnimitmetsysehtsemocebdrac3E/3TlacolehT.tupni
F
ehtotdetcennocecivedehT.srucconoitpursidgnimitmetsysoN
.langisfossolstceteddrac3E/3Tlacol