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Applications
The FRM220A-Eoe1/G E1 LAN Bridge works in point-to-point
applications, either as a stand-alone (in CH01, 02, 04) or when placed in
the CH20 managed rack.
Ethernet over E1
Typical Point-to-Point Application
The E1 transmission signal traditionally has been used to carry voice
within the Public Switched Telephone Network. With the emergence of IP,
E1 has also found use as a carrier for Data. A single E1 is able to carry
Ethernet data by using HDLC (High-level Data Link Control) WAN
encapsulation. The FRM220A-Eoe1/G is also able to use GFP-F to send
the Layer 2 Ethernet over the Layer 1 E1 transmission medium. A carrier
can then use this transparent Ethernet to connect to a customer owned
broadband router. The FRM220A-Eoe1/G supports GFP-F according to
ITU-T G.7041.
Broadband Router over E1
Deployment in Data Communications Network
Ethernet
Ethernet
Remote
Loc
Internal
Recovery
E1x1
Ethernet
Ethernet
Remote
Eoe1/G
Local
Eoe1/G
Recovery
Recovery
E1
E1
SDH
Router
Router
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Console Management
When placed in the 1-slot CH01M or 2-slot CH02M chassis, this card can
be locally managed by connecting a simple serial terminal such as a
notebook computer that has an RS232 port or via a commonly available
USB to RS232 adapter. In Windows XP, HyperTerminal™ is an application
available for emulating a serial terminal. You can also search for TeraTerm
or PuTTY which are free alternatives, especially if the operating system is
Vista or Win7.
Settings
Baud Rate: 38,400 | Data bits: 8 | Parity bits: none | Stop bits: 1
Handshaking: none | Emulation: VT-100
Connect the serial cable to the DB9. Run the terminal emulation program.
With power on, press [ESC] or [Enter] to display the "Main Menu" screen.
The following is an example.
Example of Main Menu Console Screen, FRM220A-Eoe1/G
The Upper portion of the screen provides the real-time status of E1, GFP
and Ethernet LAN port while the lower portion has the configuration menu
items.
**************************************************************
*** CTC UNION TECHNOLOGIES CO., LTD. ***
*** FMR220A-Eoe1/G Ver:1.100-1.000-1.000-3.000 ***
**************************************************************
[Local]
Remote Device :[Link Up ] Remote Power :[On ]
E1 LOS AIS LOF MLOF RAI CRC BPV LOOP
No No No No No No No No
LAN Link :[Up ] Auto Negotiation :[Auto ] Speed :[100M ]
Duplex :[Full ] Flow Control :[Disable] Active :[Enable ]
<1> Parameter Setting <2> BERT
<3> Timing Source :[Recovery] <4> Local/Remote :[Local]
<5> Failover :[Disable] <6> Config Priority :[Dip Switch]
<7> VLAN Set <8> RMON
<A> Encapsulation :[HDLC] <B> Net Manage :[OUT BAND]
<Q> Quit Terminal <D> Default <U> Online Upgrade <R> Reset <S> Save
<ESC>: Go to previous menu. Please select an item.
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Status Indications
E1 Status Alarms
LOS (Loss Of Signal) – LOS is indicated when the E1 receive circuitry
detects no signal or if the signal level drops below usable threshold.
AIS (Alarm Indication Signal) – AIS is an unframed, 'all ones' pattern
which is generated at E1 Tx whenever the Rx experiences LOS. This
allows the local device to report an LOS condition to the remote device.
AIS is specified in ITU-T G.775 Recommendation.
LOF (Loss Of Framing) – If an E1 receive has a long un-terminated
connection, it may not indicate an LOS (due to antennae effect).
However, if the bit stream does not contain the proper framing
information, an LOF will be indicated.
LOMF (Loss Of Multi-Frame) – The framing structure for E1 is defined
in ITU-T G.704 Recommendation. Multi-frames are typically generated
when E1 is used for voice communication. This alarm is issued in the
event of multi-frame error or loss.
RAI (Remote Alarm Indication) – Sometimes referred to as 'Yellow'
alarm, the RAI (remote alarm indication) signal indicates loss of layer 1
capability at the user-network interface.
CRC (Cyclic Redundancy Check) - This alarm appears when the Cyclic
Redundancy Check (CRC) fails.
BPV (Bi-Polar Violation) - This alarm normally appears when there are
Layer 1 issues or problems with line coding.
Loop - This alarm appears when an E1 loop is detected (loop detection
must not be disabled).
LAN Status
LAN Link (Up/Down) – Link Up indicates the LAN is linked to another
active Ethernet device.
Auto Negotiation (Auto/Manual) – The default is auto with speed auto
detected and Duplex negotiated per IEEE802.3u.
Speed (10/100) – This indicates the auto detected speed or the manually
set speed of the Ethernet.
Duplex (Full/Half) – This indicates the negotiated or manually set
Ethernet Duplex mode.
Flow Control (Enable/Disable) – Flow control is defined in IEEE802.3X.
Active (Enable/Disable) – This indicates the LAN port setting. Disabling
the port will block all traffic.
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Operation
Select any of the menu items by keying in the menu item number or letter.
Use the [ESC] to return to a previous menu. Settings are not applied to the
cards circuitry until save operation is performed. After all of the parameter
settings have been selected, press "s" from the main menu to save the
parameters in non-volatile RAM (NVR).
Explanation of Settings
1. Parameter Settings: This will call a sub-menu for setting E1, LAN and
GFP parameters.
2. BERT: This will call a sub-menu for Bit Error Rate Testing of E1 channel.
3. Timing Source: The timing source can be selected from received E1
signal or from an internal reference oscillator.
4. Local/Remote: When in-band management is enabled, this menu item
can switch to the remote unit for configuration.
5. Failover: When E1 Failover feature is enabled, if the E1 line disconnects,
local and remote device electrical or optical Ethernet port will show link
down. In this way, the E1 link state can be checked through the state of the
optical or electrical Ethernet.
6. Config Priority: This toggles between reading the DIP switch or making
settings and saving in Flash. The DIP controls framing and timing settings.
7. VLAN Set: This sub-menu allows enabling the VLAN tag function and
assigns the VID to the LAN port. Packets which egress the LAN are
untagged while packets that ingress will be tagged with the set VID.
8. RMON: The Remote Network MONitoring (RMON) MIB was developed
by the IETF to support monitoring and protocol analysis of LANs. This sub-
menu allows enabling, reading and clearing the RMON tables for the LAN
port's transmit and receive.
A. Encapsulation: This unit supports both GFP and HDLC encapsulation
methods. Both units in the E1 link must be set to the same method.
B. Net Manage: The in-band management uses Sa bits 4-8 of the E1. If a
particular bit is required for another application, switch to out-band.
Q. Quit: This exits the terminal program.
S. Save: After settings are made they need to be saved. Use this
command.
D. Default: This will return the unit to factory default settings.
U. Online Upgrade: When stand-alone, the upgrade function is only
applicable in the factory. Users perform upgrade by placing the Eoe1 into a
managed chassis, such as CH20 with NMC.
