Alligator 2788 MAS Technical Manual

Ethernet/rs-232 uhf radio transceiver

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

Preliminary Release

Model 2788 MAS

Ethernet/RS-232

UHF Radio Transceiver

Technical Manual

Alligator Communications Model 2788 Technical Manual REV2.3

Page 1

Table of Contents

Need help?

Do you have a question about the 2788 MAS and is the answer not in the manual?

Questions and answers

Summary of Contents for Alligator 2788 MAS

Page 3: Table Of Contents
5.3 18 5.4 19 5.5 19 5.6 19 5.7 19 5.8 19 5.9 20 5.10 Subnet Mask20 5.11 RS-232 Data Rate20 5.12 Anti-streaming Timer20 5.13 Telnet Session Activity Timer20 Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 3...
Page 4 6.0 Theory of Operation26 6.1 RS-232 Communications26 6.2 Ethernet Communications26 6.2.1 Packet Forwarding26 6.2.2 Telnet Radio Configuration and Diagnostics27 6.2.3 Graphics Heavy Communications27 6.2.4 High QOS (Quality Of Service) IP Communications27 Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 4...
Page 5: General Description5
Preliminary Release Introduction Thank you for purchasing the Alligator Model 2788 UHF Radio Transceiver. We are here to assist you personally should any questions arise in the installation or operation of this product. Please feel free to call us. We look forward to your feedback and will strive to make our product as compliant with your specific needs as possible.
Page 6: Technical Specifications6
Type N female Power 2-pin Captive, Rectangular Data (RS-232) DB9F Environment Temperature -30°C to +50°C Humidity 95% at 40°C Dimensions 6.75” x 1.5” x 5.75” Weight 2 pounds Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 6...
Page 7 1 Hz Frequency Stability ±1 ppm Selectivity 100 dB Desensitization -60 dB Intermodulation -75 dB (EIA) Spurious Image Rejection -80 dB Bandwidth 6.25, 12.5, 25, or 50 kHz** Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 7...
Page 8: Warranty8
BUYER; and to be free from defects in material and workmanship. Alligator Communications will repair or replace, at its expense, for a period of one year from the date of delivery of equipment, any parts that are defective from faulty material or poor workmanship.
Page 9: Information To User, As Required By Fcc Section 15.219
1.6 Information to user, as required by FCC section 15.21 Changes or modifications not expressly approved in writing by Alligator Communications, Inc. may void the user’s authority to operate this equipment. In accordance with FCC Rules Section 15.21, the user of this equipment is advised that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Page 11: Power Connector11
+13.8 Vdc (nominal). The red conductor is positive; the black conductor is negative and is internally grounded to the chassis. 2.2.3 Initial Checkout Alligator wireless data transport products are factory-configured according to customer configuration information received prior to shipment from the factory; thereby, customer field configuration requirements are minimized.
Page 12 Terminal set for local echo on. For example, below the computer has an IP address of 192.168.1.2 and communicates via Telnet to the 2788 on the default IP address 192.168.1.128 port 23. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 12...
Page 13 2788 status and configuration (Fig. 2). You may end a Telnet session at any time by entering q. The menu can be re-displayed by either entering <CR> or <ESCAPE>. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 13...
Page 14 The remote radio (om=0<CR> will automatically echo back packets when in the dt=0<CR> configuration. 13. Alligator provides software testing tools to do end-to-end testing such as the Alligator Packet Error Rate Tester. For example, Alligator provides software tools for simulating a host sending random data messages to keep track of errors that are not echoed back properly by an RTU simulator tool.
Page 15: Field Configuration And Verification15
This aids in preventing flooding the radio network with unwanted packets. The 2788 shipping default is fm=3<CR>. This Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 15...
Page 16 Fig. 3) The push button also restores the original defaults for the IP address, subnet mask, and gateway. To disable password protection, either press the push button or enter ep=0<CR>. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 16...
Page 17: Front Panel Indicators17
On when diagnostic transmit data is active. Table 1 LED Definition The LEDs show the status of both Ethernet and RS-232 serial data. Diagnostic data occurs during Telnet sessions. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 17...
Page 18: User Configuration And Diagnostic Menu18
The access is either local, using the Ethernet RJ-45 connector or remote through the radio system. The command line interface facilitates writing scripts for automated configuration. Contact Alligator for GUI based software utilities that front-end the Telnet commands to simplify network management of multiple 2788 radios further .
Page 19 5.8 Telnet Port The 2788 Telnet port can be reassigned from the default of 23 to any port up to 65535. This adds additional security to the system. tnp=#####<CR> Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 19...
Page 20: Subnet Mask20
The 2788 times activity when using password access (pw=1). If there is inactivity for more than the specified time duration in seconds, the log-in session is automatically terminated. The default log-in session activity timer default is 120 seconds. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 20...
Page 21: Enable Transmitter21
256-bit AES256 encryption key using the SHA256 secure hashing algorithm. This key is used encrypt and decrypt 128- bit message fragments used in the AES256 encryption standard. Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 21...
Page 22: Log Out22
This is the RTU MAC hexadecimal address of the first RTU connected to a remote 2788. It is stored at the remote 2788 and is used when the remote radio is in forwarding mode 0 or 2. rtu0=##-##-##-##-##-##<CR> Example: rtu0=01-23-45-ab-cd-ef<CR> Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 22...
Page 23: Remote Rtu1 Mac Address23
Normally the table is filled, starting at 0 and progressing to a maximum number of f. Note that RS-232 always has high priority since it is most commonly used for polled systems. host[#]=###.###.###.###<CR> Example: host[0]=192.168.1.2<CR> ; host[1]=192.168.1.3<CR> ; host[f]=10.0.0.10<CR> Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 23...
Page 24: Loopback Remote Mac Address24
5.29 Loopback Remote MAC Address This is the remote radio hexadecimal MAC address placed in the master radio when performing the loopback diagnostic test (dt=5). Note that Alligator 2788 radios are currently assigned to MAC addresses starting with 70-b3-d5-9c-e. lb=##-##-##-##-##-##<CR>...
Page 25: Display Status Screen25
The entire 512-entry RTU table is displayed: rtutable<CR> 5.33 Display Host Table The entire 16-entry host table is displayed: hosttable<CR> 5.34 Display QIP Table The entire 16-entry QIP table is displayed: qiptable<CR> Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 25...
Page 26: Theory Of Operation26
6.0 Theory of Operation The 2788 concurrently operates transparently using two communication interfaces: Ethernet and RS-232 (Fig. 1). The 2788 encapsulates any protocol in a proprietary Alligator format to encrypt and forward multiple packet fragments across a UHF radio link and reassemble them seamlessly.
Page 27: Telnet Radio Configuration And Diagnostics27
Telnet server for local and remote radio configuration is provided in each 2788. Thus, each 2788 is factory-assigned a unique Alligator MAC address for IP access using the Telnet protocol. The user is able to program the IP address, gateway address, subnet mask, and Telnet port address.
Page 28 Preliminary Release RTU#1 Internet Remot Master Radio Radio RTU#2 Bastion Host Compute Diagnos Comput Etherne Etherne t LAN t LAN Figure 1 2788 Typical SCADA Block Diagram Alligator Communications Model 2788 Technical Manual REV2.3 Copyright © 2019 Page 28...
Page 31 FCC Statement 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operation. 2.

Alligator 2788 MAS Technical Manual

Quick Links

Need help?

Questions and answers

Related Manuals for Alligator 2788 MAS

Summary of Contents for Alligator 2788 MAS

Table of Contents