The PacketBand-ISDN-1B delivers switched, transparent, synchronous, ISDN data services across asynchronous packet networks.


  • Product version supports a single ISDN BRI
  • Provides low-cost migration to IP networks for legacy equipment
  • Low-cost solution for carriers wanting to deliver ISDN services
  • US-ANSI and Euro-ETSI ISDN available
  • Transmits all data and voice protocols over packet networks
  • Totally transparent to all data formats
  • Any “B” channel can dial any other on the packet network, or “break-out/in” via a “gateway” PacketBand to national/international ISDN
  • All PacketBands and interfaces synchronised to the same clocks
  • Internal AC, DC and POE power options
  • SIP Server option for centralised call routing
  • Various clocking options with high quality clock recovery
  • Configurable packet size
  • Compensates for “jitter” or packet delay variation
  • Re-orders packets
  • Very low latency or processing delay
  • Two 10/100 Base Ethernet ports; one to WAN (Packet Network) and one to a local Ethernet port
  • Ethernet ports support Rate Limiting
  • Quality of Service (QoS) options
  • VLAN and Double VLAN tagging
  • Full cross-connectivity
  • Supports NT presentation (connects to local equipment and acts like a network)
  • Support for contention or over-booking
  • Call Progress Tone generation
  • Automatic Primary/Secondary/Tertiary routing options
  • Routing profiles can be scheduled at different times of the day/week
  • ISDN Layer 2 and Layer 3 message capture and log for analysis
  • Easy and intuitive to configure via GUI management package
  • Compact table-top with optional rack-mount extenders
  • Approved (Telecoms, Emissions, Safety)
  • RoHS compliant

In its simplest form, PacketBand can be used to extend a BRI service across a packet network, maintaining synchronisation between the two units as illustrated in diagram 1 below:

PacketBand-ISDN-1B diagram 1

Diagram 2 shows the possibility of extending a BRI network service from a carrier across a network where the carrier’s clock is recovered at the remote end, once again, maintaining synch. In this illustration, the two encryptors connected to the packet network can intercommunicate, or share the ISDN to establish a link with the remote ISDN-connected device, as and when needed.

PacketBand-ISDN-1B diagram 2

In larger networks, as shown in Diagram 3, inter-working with other versions of the PacketBand range gives many configuration opportunities. As all PacketBands have the ability to place calls dynamically, a PRI PacketBand could be communicating with up to 30 remote PacketBands on a single PRI.

PacketBand-ISDN-1B diagram 3

In diagram 3 above, any PacketBand can establish calls between any other, giving complete inter-connectivity for attached devices within the packet network, or “breaking in/out to or from the PSTN. Alternatively, some applications or carriers want all calls to be routed to one or more central switches/PABXs. This switch then either returns the call back to a PacketBand on the packet network, or passes it to the PSTN or inter-connect partners as in Diagram 4.

PacketBand-ISDN-1B diagram 4

As calls are established dynamically, there are options for contention. Additionally, PacketBand’s number translation capabilities means they can perform many kinds of manipulations, for example adding CLIs (perhaps for billing purposes), converting numbers (for emergency calls or for security reasons) or performing least-cost-routing functions.

Routing and Features:
Type of User Traffic
– Any. PacketBand passes all “B” traffic transparently in a clock-locked or synchronous environment. All PacketBands in the network are synchronised to a common clock.

Connectivity – Full inter-connectivity with any other PacketBand-ISDN equipment, PRI or BRI. Full inter-connectivity with any other devices connected to the global ISDN/PSTN via a PacketBand IP/ISDN gateway

“Break-Out” – PacketBand can be connected to the real ISDN network as a “gateway”, giving devices connected via the Packet Network access to/from all other ISDN devices in the world.

Logical Links – A “Logical Link” is a connection between any two PacketBands, irrespective of the number of “B” channels within the Link. Each PacketBand-ISDN-1B comes supplied with one Logical Link as standard. A second Logical Link can be purchased if required, giving the ability for each “B” channel to communicate to different devices.

In-Coming Call Routing – ISDN traffic can be routed based on DDI (MSN), CLI, Sub-address, type of call (voice, fax, video etc.), or a combination of these fields. Calls can be routed to either of the “B” channels or one specifically.

Out-Going Call Routing – ISDN calls are routed to a remote PacketBand over the IP network either by user-configured rules or by using our SIP Server.

Call Conversion – This feature enables PacketBand to add, edit or remove the digits in any part of a call before it is forwarded on. An example application might be where emergency numbers may need to be routed to a specific regional office and PacketBand can convert, for example, "112" into the correct regional telephone number for that location. Another example would be where the dialled number needs to be forwarded to a "hidden" destination number.

Call Barring – Block calls from certain CLI and/or calls with a certain DDI.

Alternate Routes – PacketBand supports Primary, Secondary and Tertiary routes. Should the primary destination be unavailable, the call will be routed to the Secondary etc.

BRI Port Options – User-selectable ETSI/ANSI. Tone generation, SPIDs and the ability inhibit particular information elements on a per-port basis is also standard. There are advanced options to allow connection to a wide range of ISDN devices supporting specific operating protocols and features.

Packet Network Features:
Selectable Protocol: Choose from Pseudo-wire over IP or Pseudo-wire over IP including UDP/RTP.
Frames Per Packet: User-selectable size of packets to optimise performance.
VLAN: Configure a VLAN by adding tags to packets on a per Logical Link basis.
QOS: Configure QOS settings for each PacketBand unit, TOS and Diff Serv.
Packet Prioritisation: Set priorities for the handling of packets based on port, Diff Serv codepoint value or 802.1p value.
Rate Limiting: Limit packet rates from/to any Ethernet port by port or priority.
NAT Traversal: Set a Public IP Address to allow NAT traversal.
Sniffer Port: Configure a spare Ethernet port to receive RX and/or TX packets mirrored from any/all other PKT Port(s). This allows for connection of another device to monitor Packet traffic.
Auto Negotiation: Configure PacketBand to Auto-Negotiate Speed and Duplex settings, or force the unit to use Full/Half Duplex and 10/100M.


BRI Interface

  • Support for one BRI
  • Typical driving distance – typically 500m
  • Overlap to En-Bloc conversion


  • RJ45 120Ohm balanced
  • Point-to-Point and Point-to-Multipoint
  • ETSI-DSS1 (Euro-ISDN)
  • ETSI Q.931/921
  • ETSI 300-011 (Layer 1)
  • ETSI 300-125 (layer 2)
  • ETSI 300-102 (layer 3)*


  • RJ45 100Ohm balanced
  • Support for SPIDs and Auto-SPID
  • NI-2 North American National
  • DMS-100 and 5ESS switch variants
  • AT&T TR-62411 and ANSI T1.403

Packet Ports (x2)

  • RJ45 standard twisted-pair CAT5E cable
  • Typical driving distance 500m–1,500m per Link depending on data rate and cable
  • Supports data rates up to 50Mbps full-duplex between two units
  • Provides management access to all units with Ethernet card in PC

Serial Control Port

  • Access password protected
    Asynchronous, 8 data, 1 stop bit, no parity speed 19.2 to 115kbps


(1) Internal AC PSU

  • Standard IEC connector
  • 95-240 VAC; 15W; 47-63Hz
  • Auto-sensing
  • Standard IEC connector
  • Max consumption
  • 0.2Amps RMS @230VAC

(2) Optional internal Telecoms DC Supply

  • Ring terminals
  • 37 to 67VDC
  • Meets ETS300-132-2
  • Typical consumption 0.35Amps

(3) Optional 3-way Internal PSU

  • 1. AC as above
  • 2. DC supply
  • 2.1mm jack
  • 12VDC to 57VDC
  • Consumption 0.3Amps @ 48VDC
  • 3. POE (Power Over Ethernet)
  • Class 0
  • 802.3af Compliant

(4) Redundant Power

  • Available by using two or more of the options in (3) above
  • An optional AC to DC supply is available.
  • Alarms generated

Mechanical & Environmental

  • Metal chassis 225w x 200d x 44h mm-1U
  • Weight 0.85Kg
  • Optional 19” rack-mount kits.
  • Humidity 10-90% non-condensing


  • No user-serviceable parts
  • Battery for Real-Time Clock and NV RAM elements has a typical 10-year life
  • No maintenance required

All approvals completed in UK


  • EN55022:1988
  • EN55024:1988
  • EN61000-3-2/3:1995
  • AS/NZS CISPR22:2000


  • ACS/NZS60950:2000
  • AS/NZS3260:1993
  • ACA TS001:1997
  • IEC60950-1:2002 including National differences
  • RoHS Compliant

Live Demo of FRM220 Chassis

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