Overview & Applications
4 Wire Analog Voice Frequency over Packet NetworksThe BlackTube VF has balanced 4-Wire 600 ohm Voice Frequency interfaces that utilize a PCM CODEC to convert Analog Voice Band into Digital that is AES encrypted for secure transport over Ethernet packet services. This conversion facilitates the interconnection of Voice Band communications over cost effective and ubiquitous Ethernet based LAN/WAN/MAN wired and wireless network services such as MPLS, xDSL, Cable Modem and 4G/LTE.
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4-Wire Analog to IP Converter4-Wire leased line analog networks interconnect VoiceBand Communications for Utilities, Municipalities and Public Safety Agencies. Cost and availability issues with these copper telephone lines make finding transport alternatives a priority. Converting VoiceBand interfaces to packet data is a cost effective and easy to implement alternative. BlackTube VF Standard Features
Dual LAN Interfaces All BlackTube VF models ship with dual 10/100 BaseT Ethernet LAN ports. The dual Ethernet interfaces provide for: - Management interface on LAN port 2 when LAN port 1 is connected to a VPN tunnel
- Protector Option: Redundant Packet Path connections with Constant or Switch Over Criteria
Assured Delivery Protocol In order to assure high quality communications over links with intermittent or noisy performance, such as Wireless, the BlackTube VF employs Engage’s robust Assured Delivery Protocol with the following benefits: - Packet out of sequence detection and re-sequencing
- Duplicate skipping
- Lost packet retransmissions with configured delay
IP Tube VF Optional Features
Protector OPTION -PRO The protector option utilizes the second LAN interface as a redundant path for the interconnection of the IP encapsulated VoiceBand. The extension of the VoiceBand has a fault tolerant link that is configured to always on, or with switch over criteria. |
Applications
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Public Safety Radio Tower Wireline Encrypted Audio over Packet Networks A primary application for the BlackTube VF is the conversion of Voice Grade circuit interfaces, that connect Public Safety Radio Base Stations to concentrator hubs, into packets. The BlackTube VF employs high resolution Analog to Digital circuitry that maintains the quality of the original audio signal.
The packetized Voice Band communication can be transported over Ethernet Packet services such as: • xDSL • Cable • Cellular 2/3/4G LTE • MPLS • WiFi The BlackTube VF interfaces directly to the 4 wire analog interface of the 4 Wire Wireline interface of a Radio Base station facilitating the use of Ethernet / IP / MPLS networks to backhaul Analog Radio Tower locations. |
Technical Specifications
Category | Specification |
Encryption Algorithm
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| AES 256-bit
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| Fully Automatic key management
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LAN Network Interface
| • | Two 10/100BaseT Ethernet interfaces
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LAN Network Protocols Supported
| • | IP, TCP, UDP, ICMP, Telnet, SSH, DHCP, DDNS
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4-Wire Analog VF Voice Grade Interface |
• | One to Four: 4-Wire Full Duplex independent Transmit and Receive
| • | 600 Ohm Balanced
| • | Frequency 200 o 3400 Hertz |
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Analog Over IP protocol
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• | TDM Over IP | • | Circuit Extension Services Over IP |
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Regulatory |
• | CE | • | Safety -IEC60950 | • | EMC - CFR 47 Part 15 Sub Part B: 2002, EN55022: 1994+A1&A2, EN55024, ICES-003 1997, CISPR 22 Level A |
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Management
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• | Secure Socket Shell - SSH V2 | • | Telnet support with Edit and Paste Template Files | • | Console Port for Out of Band Management | • | SNMP Public and Private MIB support with configured traps
| • | Online Upgrade Capable (FLASH ROMs) | • | IP Tube is fully operational during upgrade |
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Dimensions
| • | Dimensions: 9" (L) x 7.3” (W) x 1.50” (H) |
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Environmental
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• | 0° to 132° F (-10° to 50°C ) operating temperature | • | Up to 90% operating humidity (non-condensing) |
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Power
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• | 12-30 VDC, 1.0A. | • | Screw Locking Connector | • | Universal Adapter 100/240 VAC 50/60 Hz | • | Optional -48V 0.25 Amp | • | Hot Standby |
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Quality of Service Support
| • | IP Type of Service (TOS) | • | IANA Registered UDP Port 3175 | • | 802.1p/q mac level prioritization |
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How to Order
Ordering Information |
Optional Features |
Protector OPTION -PRO |
The protector option utilizes the second LAN interface as a redundant path for the interconnection of the IP encapsulated VF data. The extension of the VF has a fault tolerant link that is configured to always on, or with switch over criteria. |
How to Order – Black•Tube VF



| Part No. | Description | Notes | | | | 007-VFAD-0x | Black•Tube VF | Specifiy # of Voice Frequency Ports (1-3) | CH-007-VFAD-0x
| Chassis Slot Card: Black•Tube VF
| Specifiy # of Voice Frequency Ports (2 or 3)
| | | | Base Option | | Specifiy as suffix
| | | | -PRO
| Protector Option
| Faul Tolerant Nerwork Interconnect
| | | | Power Options | Specifiy as suffix
| Hot Standby Configuration 2nd Power Suffix | | | | -HSPDC | Connector for Dual DC Supply
| | -WIREDC | Power Supply Module 12/26 VDC Screw Term | | -N48VDC
| Power Supply Module Negative 48 Volt DC
| Isolated Negative 48 Volt Power
| Rack Mount Option | | Specify as suffix | | | | -RACKMNT | 19/23" Wide Rack Mount Brackets | Enclosure Nutserts Installed |
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