SUBNET Solutions Inc - Making Substations More Intelligent
Call: 1.403.270.8885
SUBNET Products
CCE Brochure Download
Continuous Current Evolution (CCE)
White Paper Download
Manage Utility IEDs Remotely...
SUBNET Newsletter
The latest in smart grid technology

DG-108 Remote Unit

Control Access via Dial-up Modem to Substation Devices

Click here to request a demo of DG-108
  • The DG-108 is a telephone line sharing switch with call authentication and logging capability. It is typically located at utility substations and connects between the phone line and up to eight (up to 16 for the DG-116) dial-up devices such SCADA equipment, IEDs and meters. The DG-108 handles both incoming and outgoing calls and can be installed into existing dial up circuit with few changes to the existing dial up parameters.
  • To allow for seamless transition from legacy line sharing switches to the DG-108 switches, incoming call DTMF routing to a particular device port is still possible when the authentication feature is off. After a certain comfort level has been established while operating in the legacy mode, authentication can then be turned on either remotely via CAS or locally. The DG-108 logs all call activity, whether authenticated or not, including time / date, identity of calling Unit and duration of call. DG-108's are factory configured with a serial number, customer ID.
  • Each DG-108 contains a list of access codes of other DG-108 Units that are authorized to call in. An incoming authenticated call through a DG-108 Unit can succeed only if the receiving DG-108 Unit has the originating DG-108 Unit access code in its configuration memory.
  • In systems with a Central Administration System computer (CAS), CAS generates and assigns all access codes to all of the DG-108 Units (Host, Remote and Portable versions). These access codes are maintained by CAS and are not accessible to the user. CAS also manages DG-108 Unit configurations and call activity data downloads.
  • For smaller systems without a CAS controlled system, DG-108 configuration changes and call activity data downloads are done locally on each Unit.
  • Device port security can be enabled / disabled on a port by port basis.
  • DG-108 Remote Units function independently of one another and operate with or without CAS.
  • The DG-108 has the same functionality as the LS-101 Host Unit and can in fact be used in place of the DSP-101.


Power: Standard: 20 - 160 VDC, < 7W idle, < 15W max Optional: 10 - 160 VDC

Aux & Fuse Alarm Outputs: 1 Fuse alarm output form A / B jumper selectable 2 Aux outputs form A / B jumper selectable

Phone Line & Device Ports: 1 phone line jack, 8 device jacks

Environment Standard: 32 to 120 °F (0 to 50 °C), 0 - 95% non condensing rel. humidity Optional: -40 to 120 °F (-40 to 50 °C).

Meets USA / Canada interconnect and power line cross standards Substation hardened - meets IEEE1613 standards

Physical Mounting: Single or double (side by side) rack mount (1 RU), wall mount. Dimensions: 8-3/8"W x 1-3/4"H x 9-1/2"D (21.3cm x 4.5cm x 24.1cm) Shipping weight: 4 lbs. (1.8 Kg.)
© 2018 SUBNET Solutions Inc. Terms of Use   Privacy Policy   Contact Us  Resources