Carrier Access Network Device Axxius 800 - Manual (Page 381)

Axxius 800 - Release 2.2 7-9
DS3 Controller Card
Controller and DS3 Redundancy
switching the output paths so that the transmit path of the DS3 line is connected to the
standby Controller. Service interruptions (hits) will be taken on both the DS3 and low-
speed connections during this type of switch. However, since the standby Controller is
already framed up to the incoming signal, the hits are minimal.
The Axxius does not provide a non-revertive mode in electronic protection. No
automatic switchback will occur (as with a revertive Network Protection), but if the
currently active Controller malfunctions, etc. another protection switch will occur if the
mate is in a standby mode.
Active
(Primary)
M13 Mux
Controller
DS3OUT+
DS3IN+
28/21 LS
XMT Stream
28/21 LS
RCV Stream
xmt
rcv
Primary
DS3
Electronics Protection Mode
Standby
(Secondary)
M13 Mux
Controller
DS3OUT+
DS3IN+
28/21 LS
RCV Stream
28/21 LS
XMT Stream
Controller
Select
Disable
Enable
Electronics Protection Mode of the Axxius DS3