|Multitech Universal Socket Products|
|MTSMC-H5 (HSPA) Product Support|
|MTSMC-G2 (GPRS) Product Support|
|Some modems have smaller operating temperatures|
|96mm X 89mm|
|Weight 20.4 (approx)|
The TS-MULTI-104 is a PC/104 device that carries Multitech socket modems. It uses a standard 16550 driver, and is designed to work with nearly all PC/104 hosts.
2 Getting Started
The TS-MULTI-104 will use the standard 16550 driver provided by the host system, but the driver will need to know the COM address and IRQ which are both selected by the onboard jumpers.
This example is for a TS-7800 with only IRQ6 and the 1.8MHz jumpers on.
# If you are in Debian the next 2 lines will turn on the PC104 bus . /initrd/ts7800.subr pc104on modprobe ts7800_isa16550 irq=6 io=0x3F8
To view if it loaded correctly, run 'dmesg' and you should find a line similar to this:
serial8250: ttyS2 at MMIO 0xee0003f8 (irq = 70) is a 16550A
So in this case the COM device will be /dev/ttyS2. You can use a terminal emulator like minicom or picocom to quickly test communication. Upon typing "AT" and pressing enter, the modem should respond with OK.
2.1 Getting a Data Connection
Using our Linux boards you would use pppd to dial up to your carrier. For example, these scripts will work with tmobile:
/dev/ttyS2 noauth 115200 debug usepeerdns persist defaultroute connect "/usr/sbin/chat -v -f /etc/ppp/chatscripts/tmobile" disconnect "/usr/sbin/chat -v -f /etc/ppp/chatscripts/tmobile-disconnect"
TIMEOUT 10 ABORT 'BUSY' ABORT 'NO ANSWER' ABORT 'ERROR' "" "\p\p\p\p\p\p\p\p\p\p\p\p+++\p\p\p\p\p\p\p\p\p\p\p\p" "" "ATH0" "OK" 'AT+CGDCONT=1,"IP","wap.voicestream.com"' ABORT 'NO CARRIER' OK 'ATD*99***1#' CONNECT
"" "\K" "" "+++ATH0"
Using a different carrier you will likely only need to replace wap.voicestream.com with the access point for your carrier.
To start pppd:
pppd call tmobile # Or for more logging information: # pppd nodetach call tmobile
This will create a ppp0 interface that can now be used as a standard network interface, and should set up a default route to the internet.
2.2 Frequency Selection
The default configuration for the MTSMC-G2 module is for 1900MHz/850MHz which is used in the US, but this is configurable through software. You can find a list of gsm frequencies used by various countries here. If you require 900MHz/1800MHz you can add in the line before the AT+CGDCONT line in your chat script:
You can replace the 5 with any from this table:
|1||900MHz extended (900E)|
|5||900E / 1800MHz|
|6||900E / 1900MHz|
The second argument of 1 tells the modem to restart immediately on the requested frequencies.
2.3 Faster Data Rates
While the MTSMC-G2 (GPRS) is limited to 115200 baud, the MTSMC-H5 (HDSPA) can communicate over serial up to 921600 allowing actual transfer rates around 80-90KB/s.
When used with the GPRS modems and those requiring a maximum baud rate of 115200, you can use the PC104 clock to generate a 1.84MHz clock needed for the 16550. When using faster modems like the H4 for an HSDPA connection you can remove the 1.8MHz jumper to use the alternative 14.7456MHz crystal. This will allow you to reach baud rates up to 921600. This will require you to specify a custom baud_base to the serial driver.
To set a custom baudrate in Linux you would typically use the setserial command. When the spd_cust baud rate it set Linux will re-purpose 38400 to use your custom baud rate.
Larger divisors will also work, but this should cover the common range. Using the setserial command you can specify the divisor. For example, to reach 115200 with the alternative baud base:
# ttyS2 is an example, but check "dmesg" after loading # your 16550 driver to get the device setserial /dev/ttyS2 spd_cust baud_base 921600 divisor 8
Next you will need to tell the modem to communicate at the faster baud rates. You can use a client like picocom or minicom to connect directly to the modem to send it commands.
picocom -b 38400 /dev/ttyS2
Even though we are talking at 115200, 38400 must be specified since we are using a custom baud_base. You can test communication with the modem again by typing "AT", pressing enter, and receiving "OK". To reconfigure the modem to the faster 921600 baud rate you can send it this command:
This will respond with OK, but now you will need to quit out of picocom (ctrl a,x) and reconfigure the baud base to use divisor 1:
setserial /dev/ttyS2 spd_cust baud_base 921600 divisor 1
The only change now needed is in your providers file. From the example tmobile configuration you would need to edit /etc/ppp/peers/tmobile and change 115200 to 38400. Starting pppd will now allow communication around 80-90KB/s (depending on your local cell tower's availability).
3.1 COM Port Address
|COM||I/O||COM1 Jumper||COM2 Jumper||COM3 Jumper|
The TS-MULTI-104 board contains a PLD with 1 register. This is available at offset 0x140, or if R10 is depopulated 0x160. Bit 1 will allow you to put the modem in reset. For example, on a TS-7800:
# On the 7800 PC/104 8 bit devices are at 0xEE000000 peekpoke 8 0xEE000140 1
This will hold the modem in reset. To bring the modem back up:
peekpoke 8 0xEE000140 0
3.3 IRQ Selection
The IRQ can be selected by the jumpers labelled IRQ3 through IRQ7. On most of our SBCs only IRQ5-7 are used.
4 Product Notes
4.1 FCC Advisory
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly (that is, in strict accordance with the manufacturer's instructions), may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class A digital device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the owner will be required to correct the interference at his own expense.
If this equipment does cause interference, which can be determined by turning the unit on and off, the user is encouraged to try the following measures to correct the interference:
Reorient the receiving antenna. Relocate the unit with respect to the receiver. Plug the unit into a different outlet so that the unit and receiver are on different branch circuits. Ensure that mounting screws and connector attachment screws are tightly secured. Ensure that good quality, shielded, and grounded cables are used for all data communications. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The following booklets prepared by the Federal Communications Commission (FCC) may also prove helpful:
How to Identify and Resolve Radio-TV Interference Problems (Stock No. 004-000-000345-4) Interface Handbook (Stock No. 004-000-004505-7) These booklets may be purchased from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.
4.2 Limited Warranty
The manufacturer warrants this product to be in good working order for a period of one year from date of purchase. If at any time within the one-year warranty period this product should fail, the manufacturer will repair or replace the product, at its option. This limited warranty does not cover damages resulting from lightning or other power surges, abuse, misuse, or unauthorized modifications including units conformally coated by a third party. Technologic Systems' will pass through to Customer any transferable Product warranties, indemnities, and remedies provided to Technologic Systems' by the suppliers, including any warranties and indemnities for intellectual property infringement. To the extent permitted by law, Technologic Systems' makes no other warranty, express or implied, such as warranty of merchantability, fitness for purpose or non-infringement. Customer's sole remedies for breach of Technologic Systems' warranty are, at Technologic Systems' choice: (i) repair the Products; (ii) replace the Products at no cost to Customer; or (iii) credit Customer the purchase price of the Products.
4.3 RF Exposure
To comply with FCC RF safety exposure limits, the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be located or operating in conjunction with any other antenna or transmitter.
4.4.1 FCC Notes
The antenna gain, including cable loss, for the device you are incorporating into your product design must not exceed the requirements at 850 MHz and 1900 MHz as specified by the FCC grant for mobile operations and fixed mounted operations as defined in FCC CFR Title 47 Part 2.1091 and FCC CFR Title 47 Part 1.1307 of the FCC rules for satisfying RF exposure compliance. Power output listed is conducted. This device is a mobile device with respect to RF exposure compliance. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20cm from all persons and must not be co-located or operated in conjunction with any antenna or transmitter except in accordance with FCC multi-transmitter product guidelines. Installers and end users must be provided with specific information required to satisfy RF exposure compliance for installations and final host devices. (See note under Grant Limitations.) Compliance of this device in all final host configurations is the responsibility of the Grantee.
4.4.2 Grant Limitations
This device has been granted modular approval for mobile applications. Portable applications may require further RF exposure (SAR) evaluations. Examples of mobile devices include wireless routers, desktop computers, utility meters, etc. Examples of portable applications include devices such as a laptop, USB dongle, mobile phone, tablet PC, and any device that can be worn on the body during use.