Introduction of DMT
(Digital Mobile Trunk)
PORTECH COMMUNICATION INC.
NO.150, SHIANG-SHANG N. RD.,
TAICHUNG, TAIWAN, R.O.C.
Since the cell phone market has been vigorously spread in
the latest few years, now almost every people will carry it as
an essential personal communication equipment, therefore,
the massive wireless phone calls have rapidly expanded and
become a giant consuming market with boundless potential.
Since there is a fierce competition to the cell-phone
communication market, suppliers have been offering
charming discount plans trying their best to win the market.
If we could utilize the combinations of different discount
plans, it’s very possible that we could provide a low-cost plan
than the existed ones. And the “DMT” is to meet this market
2. Build the channel
Through our system customer can build a channel to connect the
fixed telecommunication network (E1*1 or T1*1) and mobile
telephone network (GSM Channel *31).
3. System configuration
It applies the front-card-inserting design that contains all the circuit line cards in
one rack, provides an easy way to exchange the malfunctioned cards.
4. Main controlling unit
CPU：Pentium III 1 GHZ
Hard disk driver
5. E1/T1 interface
Apply fault-tolerance slot design, to provide different
digital trunk card for different demands (E1 PRI, T1 PRI,
T1/R1 or E1/T1 DTMF)
Digit Trunk Card
6. GSM interface
Each card contains four ports of GSM module to provide four GSM
(Mobile Trunk Interface Card - MTIC)
7. SIM card back panel
SIM card back panel which located at the back of the
DMT, allows online replacement of the SIM card.
Can hold 31 sheets of
8. SIM card expander
The SIM card expander is an optional equipment which
contains 31 sets of SCE circuit cards.
Control panel and display