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XStream‐PKG‐T™TelephoneRFModem–ProductManualv5.x00[2006.02.24]

1.3. External Interface

1.3.1. Front and Back Views

1-02a. RJ-11 Connector

Figure1‐02. FrontView

Standard RJ-11 connector is used to connect to telephone lines. [Pin

descriptions are on page 8]

1-02b. DB-9 Serial Port

Standard female DB-9 (RS-232) DCE connector is primarily used as

a medium to configure RF module and Telephone module

parameter values.

1-02c. Power Connector

7-28 VDC Power, Center positive, 5.5/2.1 mm Connector –

Installing internal jumpers J1 & J5 allows the unit to be powered

with a regulated 5V supply.

1‐02b.DB‐9SerialPort

1‐02a.RJ‐11Connector 1‐02c.Power

1-03a. DIP Switch

DIP Switch provides external control of speaker and

functions.

Figure1‐03. BackView

1-03b. Config (Configuration) Switch

Configuration Switch provides an alternate way to enter AT

Command Mode. To enter AT Command Mode at the RF Modem’s

default baud rate, read the Reset Switch entry [Figure 1-03c].

1‐03g.

LED

1‐03d.

Antenna

Port

©2006MaxStream,Inc.,ConfidentialandProprietary 6



1-03c. Reset Switch

1‐03c.

ResetSwitch

1‐03f.

RSSILEDs

Reset Switch forces both the Telephone Module and the RF Module

into reset (or re-boot).

1‐03e.

I/O&PowerLEDs

1‐03b.

ConfigSwitch

This switch can also be used in conjunction with the Config Switch

[Figure 1-03b] to enter the RF Module into AT Command Mode.

To enter the RF module into AT Command Mode:

(i.) Simultaneously press the Reset and Config switches,

(ii.) release the Reset Switch, (iii.) then after 1 sec. release the

Config Switch. The RF modem then enters AT Command Mode at

the module’s default baud rate.

1‐03a.DIPSwitch

1-03d. Antenna Port

50Ω RF signal connector for connecting to external antenna - Antenna connector type is RPSMA (Reverse Polarity SMA).

1-03e, 1-03f, & 1-03g. LED Indicators

Table1‐02. LEDindicatorsandtheirmeanings

1-03e. I/O & Power LEDs 1-03f. RSSI LEDs 1-03g. (Data Carrier Detect) LED

LED indicators visualize diagnostic status information.

The RF Modem’s status is represented as follows:

Yellow (top LED) = Serial Data Out (to host)

Green (middle) = Serial Data In (from host)

Red (bottom) = Power/TX Indicator

(Red light is on when powered,

off briefly during RF transmission)

Used to determine RSSI (Received Signal Strength Indicator)

and fade margin available in the wireless link:

3 Green LEDs ON = Very Strong (> 30 dB fade margin)

2 Green LEDs ON = Strong (> 20 dB fade margin)

1 Green LED ON = Moderate (> 10 dB fade margin)

0 Green LED ON = Weak (< 10 dB fade margin)

Fade Margin = The difference between the incoming signal

strength and the modem’s receiver sensitivity.

Illuminated yellow LED indicates telephone

connection is established and

(Data Carrier

Detect) is asserted.

This signal is controlled by the Telephone

Module.