INSTALLATION AND MAINTENANCE MANUAL
E1 FAMILY
LICENSED & SPREAD SPECTRUM RADIOS
JUNE 2001
SECTION 2: PRODUCT DESCRIPTION
PAGE 3-89
3.14.5
Protect Port Connection (This port is for factory use only)
For monitored hot-standby protection, see Protection Switch Manual
available on Western Multiplex FTP site.
Monitored Hot Standby (MHS) protection can be established on all
Lynx
E1 and multi-E1 radios
using two identical
Lynx
radios and one Protection Switch at each site. For the
Lynx
radios
,
this is
accomplished by connecting the antenna and E1 connections to the
Protection Switch
unit, and
then connecting the
Protection Switch
unit to two separate and identical
Lynx or
radios. The
Protection Switch
unit provides the capability to switch between connected
Lynx
radios in case of a
radio hardware failure. There is an interruption in radio traffic when this switching occurs, however,
radios are typically able to re-synchronize and establish communications in a 2-3 seconds
(depending on path length and path availability). A typical MHS configuration is shown in Figure 3-
29.
F i g u r e 3
F i g u r e 3 -- 2 9 : M H S
2 9 : M H S C o n f i g u r a t i o n
C o n f i g u r a t i o n
Lynx A
Protection Switch
Lynx B
Lynx A
Protection Switch
Lynx B
Radio A and Radio B
Identical
