Fiber routingS
3. Board Configuration of the OptiX OSN 1500A
7.1 EGT2/EFT8/EFT4/EFF8/ETF8
The EGT2 is a 2-port Gigabit Ethernet transparent transmission board.
The EFT8 is an 8/16-port 100 Mbit/s Fast Ethernet transparent transmission board.
The EFT4 (seated in the half-height slot) is a 4-port 100 Mbit/s Fast Ethernet transparent transmission board.
The EFF8 is an 8-port 10/100M Ethernet optical interface board.
The ETF8 is an 8-port 10/100M Ethernet electrical interface board.
Table 7-1 shows the slots for the EGT2, EFT8, EFT4, EFF8, and ETF8 boards.
Table 7-1 Slots for the EGT2/EFT8/EFT4/EFF8/ETF8
Product EGT2 (Note 1)
EFT8 (led out from front panel) (Note 1)
EFT8 (used with interface boards) (Note 1)
EFT4 EFF8/ETF8
OptiX OSN
2500 REG Not supported Not supported Not supported Not supported Not supported OptiX OSN
1500A Slots 12–13 Slots 12–13 Not supported
Slots 2–3, slots 12–13, slots 6–92 slots 11–13,
slots 6–92 Slots 14, 16 Note 1: The EGT2 and the EFT8 support bandwidth auto-sensing, adjusting uplink bandwidth automatically according to the capacity of the slots they are seated in.
Note 2: These slots are half-height slots.
7.1.1 Functionality
Board
Function EGT2 EFT8 EFT4
Basic function Transparent
transmission of 2 GE signals
Transparent
transmission of 8/16 FE signals
Transparent
transmission of 4 FE signals
Used with an
interface board -
The EFT8 can access 8 electrical Ethernet signals itself.
Used with the ETF8, the EFT8 can access 16 electrical Ethernet signals.
Used with the EFF8, the EFT8 can access 8 optical Ethernet signals and 8 electrical
Ethernet signals.
-
Interface specifications
1000BASE-SX/LX/ZX Ethernet optical interface, supporting auto-negotiation function and compliant with IEEE802.3z.
Adopt hot-swappable SFP optical interface to support a transmission distance of 550 m for multimode fiber and 10 km for single-mode fiber (or use 40 km and 70 km optical modules
according to the actual condition).
Used with the ETF8, the EFT8 supports 10Base-T/100Base-TX.
Used with EFF8 to support 100Base-FX, compliant with IEEE802.3u.
Support
10Base-T/100Base-TX, and comply with IEEE802.3u.
Service frame format Ethernet II, IEEE 802.3, supporting 64-byte–9600-byte frames and 9600-byte Jumbo frame.
Maximum uplink
bandwidth 2.5 Gbit/s
1.25 Gbit/s;
Encapsulation format
High level data link control (HDLC) Link access procedure-SDH (LAPS)
Generic Framing Procedure-Frame Mapped (GFP-F)
Board
Function EGT2 EFT8 EFT4
Mapping mode VC-3, VC-4, VC-3-Xv, and VC-4-Xv
VC-3, VC-12, VC-12-Xv (X ≤63) and VC-3-Xv (X
≤3)
VC-3, VC-12, VC-12-Xv (X ≤63) and VC-3-Xv (X
≤3)
CAR Not supported Not supported Not supported
Flow control GE port based IEEE 802.3X complaint flow control
FE port based IEEE 802.3X complaint flow control
FE port based IEEE 802.3X complaint flow control
Link capacity adjustment scheme (LCAS)
ITU-T G.7042, supporting dynamic bandwidth increase/decrease and bandwidth protection.
Link stat pass
through (LPT) Support LPT, which can be enabled or disabled.
Testing frame Support receiving and transmitting Ethernet testing frame.
Ethernet performance
monitoring Support port level Ethernet performance monitoring.
Alarm and
performance Provide abundant alarms and performance events for convenient equipment management and maintenance.
7.1.2 Principle
The working principle of the EGT2, EFT8 and EFT4 is the same, except that GE signal or FE signal is processed respectively. Figure 7-1 takes a GE signal as an example to introduce the working principle of the EGT2.
Backplane
Service processing
module
Encapsulation module
Mapping module
Control and communication
module
Cross-connect unit 1000 M
Interface module
SCC unit
+3.3 V (standby)
-48 V 1000 M
Power module +2.5 V
+1.5 V
+3.3 V +1.8 V
Figure 7-1 Functional block diagram of the EGT2
1. In Receive Direction
The interface module accesses 1000BASE-SX/LX/ZX signals from external Ethernet equipment (such as LAN switch and router) and performs decoding and serial/parallel conversion to the signals. Then it sends signals to the service processing module for frame delimitation, preamble field code stripping, cyclic redundancy code (CRC) termination and Ethernet performance statistics. At the encapsulation module, HDLC, LAPS or GFP-F encapsulation is done to the Ethernet frame. After that, the services are mapped into VC-3 or VC-4 at the mapping module and then sent to the
cross-connect unit.
2. In Transmit Direction
Demap the VC-3 or VC-4 signals from the cross-connect unit and send them to the encapsulation module for decapsulation. The service processing module determines the route according to the level of the equipment; it also provides frame delimitation, adding preamble field code, CRC calculation and performance statistics. Finally, the interface module performs parallel/serial conversion and encoding to the signals and then sends them out from the Ethernet interface.
3. Auxiliary Units
Control and communication module
Implement communication, control and service configuration functions.
Power module
Provide DC power supply of various voltages for the board.
7.1.3 Front Panel
The front panel of the EGT2/EFT8/EFT4/EFF8/ETF8 is shown in Figure 7-2.
STAT ACT PROG
SRV
CLASS 1 LASER PRODUCT
OUT1IN1 EGT2
EGT2 OUT2IN2 LINK1 ACT1 ACT2 LINK2
FE1
FE2
FE3
FE4
FE5
FE6 FE7
FE8 EFT8
EFT8
STAT PROGACT SRV
ETF8
ETF8
FE1FE2FE3FE4FE5FE6FE7FE8
LINK ACT 12 34 56 78
EFF8
EFF8
OUT1IN1OUT2IN2OUT3IN3OUT4IN4OUT5IN5OUT6IN6OUT7IN7OUT8IN8
EFT4 ACTSTAT SRVPROG
FE1FE2FE3FE4
EGT2 EFT8 ETF8 EFF8 EFT4
Figure 7-2 Front panel of the EGT2/EFT8/EFT4/EFF8/ETF8
1. Indicators
There are four indicators on the EGT2, EFT8 and EFT4.
Board hardware status indicator (STAT) – double colors (red, green)
Service active status indicator (ACT) – green
Board software status indicator (PROG) – double colors (red, green)
Service alarm indicator (SRV) – three colors (red, green, yellow) For detailed description of the indicators, see Appendix A.
Except the above common indicators, the EGT2 has other four indicators to show port connection status. Table 7-2 shows the indicators description.
Table 7-2 Indicators of the EGT2
Indicator Status Description
On GE port 1 connects with remote equipment successfully
Connection indicator–LINK1
(green) Off GE port 1 fails to connects with remote equipment
Flashing GE port 1 and remote equipment are receiving/sending data
Data
receiving/sending indicator–ACT1
(orange) Off GE port 1 and remote equipment do not receive/send data
On GE port 2 connects with remote equipment successfully
Connection indicator–LINK2
(green) Off GE port 2 fails to connects with remote equipment
Flashing GE port 2 and remote equipment are receiving/sending data
Data
receiving/sending indicator–ACT2
(orange) Off GE port 2 and remote equipment do not receive/send data
Each Ethernet port of the EFT8, EFT4 and ETF8 has “LINK” and “ACT” indicators near the port. The meanings of the indicators are the same as those in Table 7-2.
Each Ethernet port on the front panel of the EFF8 has “LINK” and “ACT” indicators.
Table 7-3 shows the indicator description.
Table 7-3 Indicators of the EFF8
Indicator Status Description
On Fiber-port connection succeeded.
Connection indicator–LINK
(green) Off Fiber-port connection failed
Flashing Receiving/Sending data Data receiving/sending
indicator–ACT (orange) Off No data received/sent
2. Interfaces
Table 7-4 shows the interface description of the EGT2/EFT8/EFT4/EFF8/ETF8.
Table 7-4 Interfaces of the EGT2/EFT8/EFT4/EFF8/ETF8 Board
Item EGT2 EFT8 EFT4 EFF8 ETF8
Number of
interfaces 2 pairs 8 4 8 8
Access capacity 2 x GE 8 x FE 4 x FE Interface board
Interface board
Connector LC RJ-45 RJ-45 LC RJ-45
Board
Item EGT2 EFT8 EFT4 EFF8 ETF8
Swappable optical
module Supported Not
supported Not
supported Not
supported Not supported
7.1.4 Parameter Configuration
The parameters required by the EGT2/EFT8/EFT4 are as follows:
J1
It is the path trace byte. This byte is used to transmit repetitively a Path Access Point Identifier so that a path receiving terminal can verify its continued connection to the intended transmitter. When J1 mismatch is detected at the receive end, the
corresponding VC-4 path will generate the HP_TIM alarm. The J1 byte is set to
“HuaWei SBS” by default.
C2
It is the signal label byte, indicating the multiplexing structure of VC-4 frame and the payload property. It is required that the C2 bytes transmitted match those received. If mismatch is detected, the corresponding VC-4 path will generate the HP_SLM alarm and insert all “1”s into the C4.
Ethernet interface setting
Table 7-5 lists the major parameters to be set for the Ethernet interface of the EGT2/EFT8/EFT4.
Table 7-5 Parameters for the Ethernet interface of EGT2/EFT8/EFT4 Parameter Description
Working mode The EGT2 can be set to auto-negotiation or 1000 Mbit/s full-duplex.
The EFT8/EFT4 can be set to auto-negotiation or 10/100 Mbit/s half-duplex or 10/100 Mbit/s full-duplex.
Ethernet interfaces of the interconnected equipment should work under the same fixed working mode. Otherwise, the packet may be lost or the bit rate may decrease, or the service may be completely interrupted upon large volume of traffic.
LCAS enable Enable LCAS or not.
Maximum packet
length Set this item for the external port, 1522 bytes by default.
Mapping protocol Available protocols: HDLC, LAPS and GFP-F. It is preferable to select the default – GFP-F.
7.1.5 Version Description
The EGT2 and EFT8 have N1 version only. The EGT2 and EFT8 are applicable to the OptiX the OSN 3500, OptiX OSN 2500, or OptiX OSN1500 (A and B).
The EFT4, seated in the half-height slot, has R1 version only. The EFT4 is applicable to the OptiX OSN 2500 or OptiX OSN1500 (A and B).
The EFF8 and ETF8 interface boards have N1 version only. The EFF8 and ETF8 are
applicable to the OptiX OSN 3500, OptiX OSN 2500, or OptiX OSN1500 (B).
7.1.6 Technical Parameters
The technical parameters of the EGT2/EFT8/EFT4/EFF8/ETF8 are shown in Table 7-6.
Table 7-6 Technical parameters of the EGT2/EFT8/EFT4/EFF8/ETF8 Description
Parameter
EGT2 EFT8 EFT4 ETF8/EFF8
Bit rate 1000 Mbit/s 10/100 Mbit/s 10/100 Mbit/s 10/100 Mbit/s Processing
capacity 2 x GE 16 x FE 4 x FE 8 x FE E/O
interface board Line code
pattern NRZ Manchester (10 Mbit/s) or MLT-3 (100 Mbit/s)
Connector LC (SFP) RJ-45 RJ-45 E: RJ-45
O: LC Interface
specifications
IEEE 802.3z compliant
IEEE 802.3u compliant
IEEE 802.3u compliant
IEEE 802.3u compliant Optical module
type 1000Bas
e-SX 1000Bas
e-LX 1000Bas
e-ZX 1000Bas
e-ZX
100Base-FX 100Ba
se-FX Central
wavelength (nm)
850 1310 1270–13
55 1480–15
Mean launched
power (dBm) –9.5 to –4 –11.5 to
–3 –2 to –5 –23 –19 to
–14 –15 to –8 Optical receiver
sensitivity (dBm) –17 –19 –4 to –2 –22 –30 –32
Long-term operating condition
Temperature: 0°C to 45°C Humidity: 10%–90%
Description
Parameter EGT2 EFT8 EFT4 ETF8/EFF8
Short-term operating condition
Temperature: –5°C to 50°C Humidity: 5%–95%
Environment for storage
Temperature: –40°C to 70°C Humidity: 10%–100%
Environment for transportation
Temperature: –40°C to 70°C Humidity: 10%–100%
Note: The EFT8 has no optical interface. The 100 Mbit/s optical interface in this table is that of the EFF8.
The 1000 Mbit/s optical interface in this table is that of the EGT2.