Technical Data

The chapter details the hardware and software specifications of the NEMI and the SNMP protocols for the wavelength channel modules (WCMs).

NEMI Hardware

The NEMI consists of the following:

•16 MB of RAM

•24 MB of Flash memory

•AMD 486, 133-MHz Processor

•EIA/TIA-232 interface: 38400 baud

•Net interface: PCI 10 Mbps

•WatchDog

•Year 2000 compliant BIOS

NEMI Software

The NEMI software consists of the following:

•Linux 2.0.35

•Year 2000 compliant UNIX

•PPP

•netconfig (configure as Master or Slave device)

•snmpconfig

Software Upgrade

Reprogramming of the Flash memory is available through an Ethernet connection or serial port connection. See the "Transferring a System Update" section.

External Modem Configuration

For dial-in and dial-out use, you have to set up an external modem using AT (Attention) commands on your modem. The settings described in Table 8-1 affect modem performance when calls start and end.

Table 8-1 External Modem Settings
Command	Description
E0	Command echo OFF
Q	Result codes are reported
V1	Verbose ON
S0=1	Answer on first ring
&C1	DCD is on after connect only
&S0	DSR is always on
	DTR on/off resets modem (depends on manufacturer)

The modem should be connected by a cable that can transmit all the signals listed in Table 8-2 to the NEMI DB9 serial connector.

Table 8-2 DB9 Serial Connector Signals
Signal	Description	Pin
RxD	Receive data	2
TxD	Transmit data	3
DTR	Data terminal ready	4
GND	Signal ground	5
DSR	Data set ready	6
RTS	Request To Send	7
CTS	Clear To Send	8
RI	Ring indicator	9

SNMP Features of WCMs

When a WCM is installed, the data marked "Automatic Read" ( Table 8-3 and Table 8-4) is automatically supplied to the NEMI.

Table 8-3 Configuration Data
Feature	SNMP Management
Serial no.	Automatic Read
Channel location	Automatic Read
Clock (yes/no)	Automatic Read
Cooled laser (yes/no)	Automatic Read
Power supply available (yes/no)	Automatic Read
Fan available (yes/no)	Automatic Read

Table 8-4 Monitoring of Technical Operation Conditions
Feature	SNMP Management
Power supply failure (yes/no)	Automatic Read
Fan failure (yes/no)	Automatic Read
Environmental temperature (of converter card)	Automatic Read
Laser temperature (stabilized laser only)	Automatic Read
Laser current (stabilized laser only)	Automatic Read

Configuration data for the WCM receivers and transmitters can be manually read ( Table 8-5). Table 8-6 shows the RSM status.

Table 8-5 WCM Receivers and Transmitters
Receiver or Transmitter	Feature	SNMP Management
Local receiver	Loss of signal	Read
Remote receiver	Status of laser (on/off)	Read
Local transmitter	Loss of signal	Read
Remote transmitter	Status of laser (on/off)	Read
Loop status	Local/remote/both/none	Read

Table 8-6 Low-Speed Multiclock
Feature	SNMP Management
Enable (on/off)	Read/Write¹
Read clock setting (125, 155, or 200, 266) Mbit/s	Read
Set clock to (125, 155, 200, 266) Mbit/s	Write 1
Clock Synchronized (yes/no)	Read

¹This option is not recommended using SNMP, since SNMP does not require a password. Use telnet with a password requirement.

Table 8-7 High-Speed Multiclock
Feature	SNMP Management
Enable (on/off)	Read/Write¹
Read clock setting (155, 622, 1244, 1062, 1250) Mbit/s	Read
Set Clock to (155, 622, 1244, 1062, 1250) Mbit/s	Write 1
Clock Synchronized (yes/no)	Read