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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.15 FMEC STM1E 1:1 Card
–
Up to 24 m (79 ft) RG179
3.15 FMEC STM1E 1:1 Card
The ONS 15454 SDH FMEC STM1E 1:1 card provides front mount electrical connection for 2 x 12
ITU-compliant, G.703 STM1E ports. Ports 9 to 12 can be switched to E-4 instead of STM-1 (via CTC,
on the STM1E-12 card). With the FMEC STM1E 1:1 card, each interface of an STM1E-12 card operates
at 155.52 Mbps for STM-1 or 139.264 Mbps for E-4 over a 75-ohm unbalanced coaxial 1.0/2.3 miniature
coax connector. The FMEC STM1E 1:1 card is required if you want to use the STM1E-12 card in 1:1
protection mode or for connection to two unprotected STM1E-12 cards.
Figure 3-16 shows the FMEC STM1E 1:1 faceplate and block diagram.
Figure 3-16 FMEC STM1E 1:1 Faceplate and Block Diagram
You can install the FMEC STM1E 1:1 card in any EFCA slot pair (18/19, 20/21, 26/27, or 28/29) on the
ONS 15454 SDH. Each FMEC STM1E 1:1 card interface features STM1-level inputs and outputs
supporting cable losses of up to 12.7 dB at 78 MHz.
3.16 FMEC-BLANK Card
The FMEC-BLANK card provides EMC emission control for empty FMEC slots. It also provides a way
to close off the EFCA area, thus allowing air flow and convection to be maintained through the EFCA.
Figure 3-17 shows the FMEC-BLANK card faceplate.
You must install the BLANK FMEC in every empty FMEC slot to maintain EMC requirements of the
system and proper air flow.
CLEI CODE BARCODE
Rx Tx
1
2
Rx
Tx
3
4
Rx
Tx
5
6
Rx
Tx
7
8
Rx
Tx
9
10
Rx
Tx
11
12
Rx
Tx
1
2
Rx
Tx
3
4
Rx
Tx
5
6
Rx
Tx
7
8
Rx
Tx
9
10
Rx
Tx
11
12
FMEC STM1E 1:1
Inventory Data
(EEPROM)
110952
2 x 12 Input
Coaxial
Connectors
2 x 12 Output
Coaxial
Connectors
B
a
c
k
p
l
a
n
e
2 x 12
Pairs of
Trans-
formers
Protect
Switch
Relay
Matrix