XECOM XEISDNU5 Datasheet
XEISDNU5 Page 1 of 10
XEISDNU5
Single Module ISDN Terminal Adapter
With Integrated NT1 Interface
Description
The XEISDNU5 integrated ISDN Terminal
Adapter is a unique component level solution for
high speed, stand-alone and embedded equipment applications needing access to ISDN service. The module can directly connect to a host
computer through its on-board EIA-232E ready*
interface and link to the ISDN subscriber line U
interface with its integrated NT1.
The device is designed for the ISDN Basic
Rate Interface (BRI) which consists of two bearer
(B) channels for data or voice and one delta (D)
channel for signaling. The module provides two
64k bps channels between the host computer and
the ISDN service. One is available as a data
channel and the other can be made available for
analog phone/fax/modem calls with the addition
of the XEISDNP Analog Telephone (POTS)
Equipment Interface. Together these provide the
user with a complete ISDN terminal adapter
function in two compact modules.
Built-in ISDN control firmware supports all the
functions necessary for setup and configuration of
the terminal adapter and the ISDN line. Configuration can be accomplished via an extended AT
command set, a menu-driven setup utility, or
factory default/user stored configuration profiles.
The built-in ISDN Monitor firmware has fifteen
commands supporting customer program
development and download. The 256K x 16
Flash Memory is designed to support custom
control program downloading. By changing a
configuration pin, the XEISDNU5 can boot-up
from the ISDN Monitor or a user developed
program as well as the built-in ISDN control
program.
Features
• Small size: 2.75" x 1.38" x 0.42"
• On-board Motorola MC68302 Integrated Multiprotocol Processor with RISC controller for
high speed operations; also included on-board:
128K x 16 SRAM, 256K x 16 Flash Memory
and 8K x 8 EEPROM
• ISDN line U interface (integrated NT1) with
2B1Q encoding (ANSI T1.601) for North
American usage. V.120 data rate adaptation
protocol and point to point protocol (PPP)
• ISDN control program allows connection with
AT&T 5ESS, Northern Telecom DMS 100 and
National ISDN-1 central office switches
• EIA-232E, ITU V.24 ready* serial interface,
300 to 115,200 bps asynchronous and 1200 to
64,000 bps synchronous data rate
• Menu-driven and stored configurations
• Control signal outputs to interface with
XEISDNP Analog Telephone (POTS) Equipment Interface module
• On-board ISDN Monitor supports user
program downloading and system debugging
• Jumper configurable memory addressing
allows change from Development mode (using
ISDN Monitor) to Application mode (using
either a built-in ISDN control program or a user
developed program)
• ISP (In System Programmable) Flash Memory
capability for future function up-grading
* Unlike RS-232, these pins have TTL level re-
versed signals; sometimes refered to as RS232-TTL.
Page 2 of 10 XEISDNU5
XEISDNU5 Block Diagram
Mechanical Specifications
INCHES METRIC (MM)
MIN MAX MIN MAX
A
2.740 2.760 69.60 70.10
B
1.370 1.390 34.80 35.31
C
0.420 0.430 10.67 10.92
D
1.190 1.210 30.23 30.73
E
2.290 2.310 58.17 58.67
F
0.125 0.200 3.18 5.08
G
0.080 0.100 2.03 2.54
H
0.215 0.235 5.46 5.97
J
0.090 0.110 2.29 2.79
K
0.020 0.025 0.51 0.64
(Total pin count is 24 per side view.)
XEISDNU5 Page 3 of 10
Pin Configuration
Pin Descriptions
Pin Name Pin # Direction Description
TIN1 1 ISDN U transformer Primary side (see schematic)
TIN2 2 ISDN U transformer primary side (see schematic)
No Pin 3 N/A No pin
TOUT1 4 ISDN U transformer secondary side (see schematic)
TOUT2 5 ISDN U transformer secondary side (see schematic)
Reserved 6 N/A No user connection allowed
Reserved 7 N/A No user connection allowed
Reserved 8 N/A No user connection allowed
GND 9 Ground Power & signal ground
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