Chapter1 Product Overview
Communication Channels
1-6
Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Expansion Modules

The Cisco Metro 1500 series system requires two identical WCMs to complete a

full communications link, one at each end of the link. Each system unit includes

a primary chassis (see Figure 1-3) that holds up to eight WCMs. The WCMs

transport up to eight independent channels.

Figure 1-3 Primary Chassis

The Cisco Metro 1500 series system can be expanded by adding more WCMs.

Adding extension chassis A, B, and C (Figure 1-4 to Figure 1-6) at both ends of

the communications link upgrades the system to transport a total of 32

independent channels. A network element management interface (NEMI) can

control up to two chassis and up to four NEMIs can be combined through an

Ethernet hub or switch to appear as a single system as seen by a Network

Management System (NMS). Werecommend that you initially install the primary

chassis and extension chassis A, which holds the BSM, to avoid service

interruption while upgrading the unit to more than eight channels. The primary

chassis and the extension chassis are each equipped with two fully redundant

load-sharing, hot-swappable power supply modules (PSMs), as shown in

Figure 1-3 to Figure 1-6.

WCM RSM
MUX
Power 1 Power 2
NEMI DMX
FAIL
POWER
OK FAILOK
FAN
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
L/T
R/T
R/R
L/R
Loop
On/Err
L/T
R/T
R/R
L/R
Auto
LB
k
LA
k
L
k
A
On
B/T
B/R
M
D
A/T
A/R
BPower
Error
Err.Int.BUS
Err.Ext.BUS
Receive
Link
BUS 1
BUS 2
Serial
Net
1-8(32) 1-8(32)
MUX DMX
78
M1
nc
78
56
34
12
D1
nc
78
56
34
12
on
Power
on
Power
I
0
METRO 1500 SERIES
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