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Cisco MWR 1900 Mobile Wireless Edge Router Hardware Installation Guide
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Chapter 1
Overview of the Cisco MWR 1900 Router
Hardware Features
Figure 1-1
MWR 1900 in an IP-RAN Solution
In the IP-RAN solution, the BTS site consists of a pair of MWR 1900 routers. The pair of MWR 1900
routers provides for an active and standby router for redundancy. A failure of the active MWR 1900
router causes the standby router to take over as the active router for the BTS site.
Each pair of MWR 1900 routers at the BTS site is identical in hardware configuration. They connect to
each other through the BTS via the Fast Ethernet interfaces. The individual backhaul links to an MWR
1900 router are cabled from a single T1/E1 termination block in the BTS, connecting to both the active
and standby routers utilizing a “Y” cable. The redundancy design to control the active/standby
transitions of the router pair leverages HSRP to control the relays on the VWIC-2MFT-T1-DIR (or
VWIC-2MFT-E1-DIR) in each router to ensure that the relays on the active router are closed and the
relays on the standby router are open to avoid double termination of the T1 (or E1).
Hardware Features
Figure 1-2 shows the front of the router. Figure 1-3 shows the back of the router.
Active
pBTS
MWR 1900 IP BTS router pair
100BaseT
T1/E1 backhaul link to
IP RAN aggregation node
Standby
65827
