Higgins International

Polnet ACP-500
Out-of-Band Network Switch


Product Info. Online Manual Polnet ACP 2.0 Manual
Download Manual: PDF Manual Download Manual for Polnet 2.0
Programming Guide: Programming Guide Download Programming Guide

Print Polnet Brochure (PDF)

ATTN: Facility and Property Managers (PDF)

ACP-500 Out-of-Band Network Switch & Call Router –  5 telephony devices share 1 phone line

The ACP-500 is an industrial grade Out-of-Band Network Switch, Dial-up Gateway, and telephone line sharing device….three solutions in one for remote network support.

  • Eliminates costly dedicated phone lines for fast R.O.I.
  • Secures dial-up modems from unauthorized access
  • Automatically directs calls to phone, fax, modems
  • Streamlines polling and data acquisition
  • Provides barge-in capability for priority outbound calls


How does the ACP Series 2.0 work?

The Multi-Link Polnet ACP-500 installs on an analog phone line and answers inbound calls at the first sign of ring voltage. After the ACP-500 goes off‐hook, it immediately screens for fax and security access codes (SAC). During this processing period, a Bell spec “ring‐back” tone is issued to the calling party.

Once a SAC command is received, the call is routed to the corresponding port. In the absence of fax/access codes, the call is defaulted to device port #1. Outbound calls are processed in the normal fashion with barge‐in protection.

The emergency barge‐in (EBI) feature allows up to four user designated device ports to seize the phone line for critical outbound calls.

The ACP-500 is an industrial grade call processor with an advanced feature set designed to route calls on an analog/simulated analog telephone line.

Upon ring detection, the ACP-500 will capture CID Data and answer the incoming call. After answering, the ACP-500 immediately scans for a CNG (fax) tone or DTMF security access code (SAC).

During this processing period, a Bell spec “ring-back” tone is provided to the calling party. If a security access code (SAC) is detected, the call is routed to the corresponding device port.

If a CNG (fax) tone is detected, the call is routed to the designated fax port (Device 2 port). In the absence of a CNG tone or security access code, the call is defaulted to the device 1 port.

The original CID Data will be retransmitted after the first ring to any device port. All device ports have access to telephone line and outbound requests are performed in a standard fashion.

Any device that tries to access the telephone line when the telephone line is in use will hear a busy signal.

The emergency barge-in (EBI) feature allows the specified device port/ports to seize the telephone line and take priority in the event of a critical outbound call.

This feature can be programmed ON/OFF (OFF by default) for devices 1 through 4 for the ACP-500 & ACP-900 units (1 through 3 for the ACP-300).

The Multi-Link Polnet ACP-500 is five port data polling call processor that eliminate up to four phone lines by auto-routing modems you connect to over a single business line.

A dedicated phone line for each data peripheral used at a remote location can cost your MIS network thousands of dollars a year in line charges.

Multiply that by the number of locations in your far flung enterprise and what have you got? An antiquated means of gathering remote-site data that saps the budget dollars right out of your MIS department.

The PolNet ACP-500 Voice/Data Processors alleviate network dependency on dedicated lines by expanding any existing voice line to accommodate up to 4 extra devices. That's a total of five communications devices sharing one phone line - efficiently and effectively.

We guarantee the ACP-500 will process calls to any type of data equipment that requires a phone line to function: any type of modem - regardless of speed, throughput or standard, and type of data terminal - credit card authorization machines, money order terminals, Underground Storage Tank monitoring systems, alarm/energy control systems and more.

Stop wasting money. Incorporating PolNet ACP-500 into your information network can have a dramatic positive impact on your budget! Use the Polnet ACP-500 and save the expense of 4 phones lines.

Reduce phone costs, improve connectivity, and secure your telecom and network equipment with Multi‐ Link’s ACP Series 2.0, OutofBand Network Switch & Call Router.


Credit Card Authorization Machines
Money Order Terminals
Cash Register Polling
Storage Tank Monitoring Systems
Out‐of‐Band Network Access
Telephony Firewall
Utility Meter Reading
Remote Site Management
HVAC Control Monitoring
Substation Communications
Point‐of‐Sale System Integration
Modem Polling
Fuel Tank Monitoring
Service Port Access
SCADA Interrogation
1st Line Network Support
ATM Machines
Refrigeration Monitoring

2 Year Warranty
110-125 VAC, 50-60 Hz.
12-15 VAC at Power Jack
8 Watts Idle
10 Watts Ringing
REN 1.1B
230V Version Available

ACP-300 (Three Devices)  
Your Price only Delivered*
ACP-500 (Five Devices)  
Your Price only Delivered*
ACP-900 (Nine Devices)
Your Price only Delivered*

We take all major credit cards

Polnet ACP 2.0
OutofBand Network Switch & Call Router

Reduce phone line costs, improve connectivity, and secure your telecom and network equipment with Multi-Link’s ACP-500 Out-of-Band Network Switch & Call Router (part of the new ACP Series 2.0).

Protecting access to information systems is becoming more critical in commercial and industrial applications, as are reliable, secure, and redundant communication paths. The ACP-500 provides these capabilities, while providing cost savings through phone line sharing (Line consolidation).

ACP-500 | Out-of-Band Network Switch

Call Routing with the ACP-500

The ACP-500 automatically routes calls to phones, faxes, and dial-up modems, ensuring that the right resource is reached the first time.

This consistent connectivity prevents time consuming dial-backs and streamlines polling and data acquisition processes such as SCADA, POS access, Substation/Revenue meter reading, Tank level monitoring, M2M communication, Submetering, and HVAC/Lighting control, etc.

Multiple devices can share a single telephone line, eliminating costly phone lines and saving up to $50/month for each line eliminated. Businesses with multiple remote sites can realize a significant ROI in 3 months or less.

The ACP-500 Provides Secure Out-of-Band Access

The ACP-500 Provides Secure Out-of-Band Access

The majority of Multi-Link’s phone/data line-sharing switches are being installed for out-of-band dial-up modem access to communication and data networks. When the network is down and normal in-band access is denied, how do you recover the network equipment? Remote out-of-band  access to management ports provides an efficient back door method for recovery.

This can be through the use of a backup dial-up modem via the Public Switched Telephone Network (PSTN). Installed on an existing POTS line, the ACP-500 provides an inexpensive, secure and controlled “out of band” path for accessing service ports to network equipment. Why pay a monthly cost for a line that you never want to use?

The Multi-Link ACP-500 Provides Secure Out-of-Band Access

The ACP-500 as a Dial-up Gateway

Protecting access to IT systems and networks is becoming more critical in commercial and industrial applications.The ACP-500 is engineered to provide an additional layer of security to connected devices.Vulnerable pathways to equipment via the PSTN are protected by programmable Security Access Codes up to seven characters.

There are over 35 million combinations to choose from, effectively creating a telephony firewall for dial-up connections. Service vendors that need to monitor their on-site equipment can now have remote access that is completely isolated from the IT network. This is most advantageous for service vendors working with Federal government agencies and businesses with strict IT security policies.

Regarding the Emergency Barge-In Feature of the ACP Series 2.0:

Please note that the Emergency Barge-In operation of the ACP Series 2.0 may not be optimal for achieving line seizure when used on the PRIMARY connection in applications involving emergency security equipment, e.g. fire, medical, police, first responder, or critical monitoring notification. Always validate approved connections with the appropriate local jurisdiction/ordinances and the Insurer of the business/property. If you choose to utilize the ACP Series 2.0 on a primary connection, it is highly recommended that all equipment involved is thoroughly tested and in compliance prior to final activation.

Questions? Call us at 866-337-0965 for further information.

The New Features include...

Programmable Security Access Codes, up to 7 digits per port, protects connected devices from unauthorized access for a robust telephony firewall.

Caller ID “Store & Forward”
CID is sent to device on first ring.

Multiple Line Seizure Ports
Up to four device ports can now be designated for emergency line seizure for critical applications.

Simplified Installation
All line‐in and device jacks are RJ11. No additional connectors are required

LED Status Display
Seven segment display shows port in use & programming value read‐back. Audible read‐back tones are also provided for remote programming.

Data Disruption Protection
Prevents active calls from interruption by another device.

Remote Programming
ACP’s can be securely programmed by a remote administrator.

Security   Multi-Port Polling
Save Money   Line Sharing
Increased Connectivity   3, 5, and 9 Port Models
Auto Fax Detect   Remote Diagnostics
Dual Surge Protection   Fully Programmable
Barge-In Protection   Call Grab
DSL Compatible   Bell Spec Ring‐Back Tones
Caller-ID Compatible   Emergency Barge-in
No Software to Install   Mounting Bracket Included
2 Year Warranty   Free Phone Tech Support

1 Polnet ACP
1 Power Supply
1 7ft. Line Cord
Wall Jack Mounting Hardware
Installation Manual

*FREE Shipping Note: All prices include FREE shipping and handling in the US and most of Canada. We reserve the right to charge up to the actual price of shipping on all orders outside the continental United States.

All US orders shipped UPS Ground unless specified.All Canada orders shipped USPS Priority unless specified. For air and express shipments, appropriate charges will be applied to your order.

The Polnet® ACP-500 is made in the USA.
Interested in purchasing the Polnet 2,0?
Questions about the Polnet 2.0 ACP series?
Email info@faxswitch.com or
Call (217) 337 - 0965
Toll Free (866) 337-0965

Polnet ACP-500

ACP-500 (Five Devices)  
Your Price only Delivered*

Call toll free (866) 337-0965 with your questions or to order by phone.


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