5 . LED FUNCTIONS

This section describes the labelling and functions of the LED on the MM-5100.

The RSSI LED will be OFF when RSSI is less than -105dBm, flashing when in-between the - 95dBm and -105dBm, and ON when greater than or equal to -95dBm.

NOTE: the higher the negative number i.e. the further away from ZERO, the weaker the received signal. The smaller the number i.e. the closer to ZERO, the stronger the received signal.

A flashing RSSI LED indicates potential need for an alternative antenna, relocating the antenna to a site more suited to signal acquisition, or elevation of the antenna to improve signal acquisition, or a combination of all the above.

A consistent RSSI reading of -95dBm or better [number closer to ‘0’] is advisable.

 

LED Label

 

 

Description

 

pwr

 

Lit continuously when power is applied to modem

 

dtr

 

 

To indicate MODEM is live on Host device

 

sms

 

 

Blinks if there is unread SMS message

 

ri/rx

 

 

Blinks on incoming voice call, lights continuously on incoming data call,

 

 

 

blinks on data from PC to MODEM

 

 

 

 

 

tx

 

Blinks on data from MODEM to PC

 

 

 

 

Lights continuously in RSSI range > -95dBm (This is the preferred range)

 

rssi

 

 

Blinks in RSSI range -95dBm > -105dBm, (Signal is marginal)

 

 

 

 

Turn-off at RSSI < -105dBm (No signal available)

 

roam

 

 

ON when inside a preferred roaming carrier network but outside Telstra’s

 

 

 

network, FLASHES when inside a non-preferred roaming carrier network but

 

 

 

 

outside Telstra’s network, OFF when inside Telstra network

 

crt

 

 

To indicate connection in Circuit Switched mode

 

pkt

 

 

To indicate active connection in Packet Switched mode (OFF when in dormant

 

 

 

mode)

 

 

 

 

 

1x cell

 

 

To indicate that local cell supports Packet Switched data (OFF indicates cell

 

 

 

supports only IS95A)

 

 

 

 

 

 

 

 

 

Note 1: In ALL-LED-OFF state, when you connect ear piece to the MM-5100, the LED’s are enabled for a value set by AT command AT$$EXT_LED=<1~255sec>. If LED always ON is required, change the AT command parameter to ‘0’.

Note 2: If the LED’s have been disabled by AT command prior to power cycle, all LED’s will remain in OFF state until ear-piece is connected.

MM-5100 Windows Setup Manual 090803 NZ

Page 8 of 44

4/09/2003