Telephone Line Sharing Switch


Used primarily for shared outbound Internet access. Can be used with or without LAN modem pools. Various models from 1-4 TelCo lines.




  • Share 1-4 Telephone Lines Between Multiple Desktop Modems or other voice or FAX equipment

  • Connect Them at the Work Group or in the Wire Closet

  • Use Them Instead of Expensive Access Servers

  • No LAN Overhead or Connection Required

  • Minimal Signal Loss From the Central Office

  • Aborts Inbound Calls to Non-Existent Devices

  • Use With PBXs on the User Side or the TelCo side

  • Share the POTS Port on ISDN Modems 

The TSS family of automatic telephone line sharing switches is designed to allow multiple desktop modems, faxes, etc. to share a lesser number of "outside" telephone lines.

Although, the TSS switches are primarily designed for dial out modem applications, FAXes, PBXes, voice sets, credit card scanners or other analog devices, they can also be connected to designated station ports to receive incoming calls. The TSSs are completely automatic and require no programming or codes to be entered.

They operate "on the fly" passing the central office signal straight through to the modem so there is no additional delay or signal reduction. In addition to automatically connecting "the biding" device to the line, they also prevent other devices from interfering with an established connection.

The probability of a user accessing a non-busy line increases exponentially with the number of lines available (see Multi-Line Models ). This also allows line utilization to increase to a higher percentage before additional lines may be considered.

Many on-line services may only be used occasionally making it difficult to justify a dedicated dial line to each desktop. The answer is to allow multiple users to share these lines. Other methods of sharing TelCo lines, such as RS-232 sharing switches, LAN modem servers or adding analog cards to a PBX, if capable, are expensive and complicated and may not address the issue of utilizing the desktop modems. The TSS family of switches is the most practical, economical and straightforward solution to sharing TelCo lines.


To meet your specific requirements, the TSS Switches are available in several different models.



They are differentiated by the number of telephone lines that they support as well as the number of station ports that they provide. As an example, the 2x8 supports two telephone lines and provides eight station ports for the user connections. All of the ports are presented through standard RJ-11 TelCo connectors.

The other difference between models is the method by which they receive power. The "Signal Powered" version (-S) receives its operating power from the TelCo line and the "AC Powered" versions (-M) are powered from a separate 9VAC wall mounted transformer. The (-P) includes a priority interrupt.

The (-S) versions can operate as stand alone units when the users are clustered in relatively close proximity. They will support about 150' of cable from each of the station ports. However, the (-S) versions must be connected to a (-M) if used in a daisy chained configuration. All of the multi-phone line units are AC powered, (-M) versions.

The (-M) versions are normally located in the wire closet. They support long cable runs from each station port and provide additional signal filtration. They can support one (-S) unit from each of the station ports.

The (-M) versions also have a ring detect circuit to handle inbound calls a little more efficiently.

For smaller single line requirements, they can be connected at the work group where a handy FAX line RJ-11 jack may already exist. Or, for larger multi-line systems, they can be connected in the wire closet along with the TelCo equipment. All of the TSS ports have standard RJ-11 TelCo connectors.

Security is always an important consideration when dealing with dial lines. They can be placed in the locked wire closet or at the work group. Depending on their placement, they can be used to secure inbound or outbound calls at any level.It addresses the residential market and includes more voice call features.

TSS 1x4
1 TelCo Line & 4 Station Ports
Item No SWTCO1x4-S

Physical 4.5" W x 3.5" D x 1.5" H, 1 lb.
Connectors (5) RJ-11 TelCo
LEDs (1) Line Activity
Switches None
Bell None
Cable None
Adaptor None
AC Power None

TSS 2x8
2 TelCo Lines & 8 Station Ports
Item No SWTCO2x8-M

Physical 4.5" W x 3.5" D x 1.5" H, 1 lb.
Connectors (10) RJ-11 TelCo
LEDs (3) Power, Line Activity
Switches None
Bell None
Cable None
Adaptor None
AC Power Wall Mount 9VAC 1A, 115V/60Hz

TSS 4x8
4 TelCo Lines & 8 Station Ports
Item No SWTCO4x8-M

Physical 7.5" W x 4.25" D x .75" H, 1 lb.
Connectors (12) RJ-11 TelCo
LEDs (5) Power, Line Activity
Switches None
Bell None
Cable None
Adaptor None
AC Power Wall Mount 9VAC 1A, 115V/60Hz