PacketBand-TDM-1 delivers a high quality, completely transparent, E1/T1 circuit across different types of IP networks  Various clocking options are available for different types of networks. PacketBand excels in delivering stable and accurately clocked E1/T1 “leased lines”. The PacketBand-TDM-1 supplies a clock-locked clear channel or structured E1 or T1 circuit over Ethernet, IP, or MPLS networks. It supports a single E1/T1 and can be used in pairs or with other members of the PacketBand range.

A 4-port PacketBand-TDM-4


  • Highly accurate and stable clock recovery processes
  • G.823 Synchronisation levels of accuracy achievable
  • Precise and steady “hold-over” clock
  • “Tuneable” to different network types
  • Robust, reliable and professional quality
  • Excellent management, statistics and diagnostics
  • Various clocking options, including Plesiochronous, Asymmetrical and Multicast
  • Inter-works with other PacketBand family members


  • A single E1/T1 interface (user switchable)
  • RJ45 120Ohm or 75Ohm (user switchable) via converter cable.
  • Full E1/T1 (user selectable) or a fractional G.704
  • 10/100/1GE UTP (Unshielded Twisted Pair RJ45) interface to the WAN
  • A local 10/100/1GE UTP Ethernet port
  • Optional SFP cage with the appropriate SFP Module interconnects to a fibre WAN
  • RJ12 management port (PacketBand is also manageable across the packet network)
  • IEC connector for quality internal AC PSU (DC options available)


Clock recovery, accuracy and stability is key to many TDM applications. This clock recovery performance must be maintained when migrating to an unclocked packet network solution. Many types of equipment expect similar performance to that of traditional leased lines which are generally referenced to the G.823 Synchronous Interface mask. The PacketBand ranges are specifically designed and optimised to excel in this area and when used on high-quality networks can meet and exceed the G.823 requirements. The clock recovery methods use a variety of mechanisms. These include sophisticated algorithms which allow users to “tune” the performance to match the network characteristics; after all, networks differ greatly – an extreme example being between the public Internet and a private managed networks supporting Quality of Service (QoS).

Ethernet and Packet Handling:

  • Support for 10/100/1GE.
  • Support for packets up to 1632 bytes in size (10,240 bytes).
  • Single MAC and IP address, Default Gateway and SubNet Mask, support for DHCP. Disordered packets are reordered automatically.


  • TDM packets can be assigned IP Diffserv (DSCP) or ToS and 802.1p CoS values.
  • Packetband supports full 802.1q tagging and the associated 802.1p CoS prioritisation levels.
  • All egress packets including TDM links can be prioritised across four output queues using CoS (802.1p) or Diffserv/ToS values.

VLAN Handling
PacketBand’s powerful and latest-generation on-board packet switch offers advanced 802.1Q VLAN facilities such as multiple TAGing, TAG insertion/removal, port routing based on default TAG or a Global TAG table. Egress packets can be TAGed, have multiple TAGs or be stripped of TAGs according to configuration. PacketBand also supports Provider Mode whereby customer packets are TAGed for transport across the network with the TAGs being removed before passing back to the customer at the far end.

Link Aggregation Control Protocol (LACP) - PacketBand-TDM-1E and TDM-1MC only
This powerful feature enables two or more Ethernet ports connected between PacketBand and the network switch to be aggregated together as defined in LACP IEEE 802.3-2005. This aggregation makes it appear as if the multiple links are acting as a single high capacity circuit. Furthermore, it adds a level of redundancy with automatic rerouting.

Rapid Spanning Tree Protocol (RSTP) PacketBand-TDM-1E and TDM-1MC only
RSTP (as defined in IEEE 802.1D-2004) identifies the means to build an Ethernet network which contains physical loops between bridges. This facility enables PacketBands to be connected to more than one network switch via different circuits and to provide an automatic fall-back in the case of a link failure.

Rate Limiting
Individual packet ports can have the traffic capacity restricted in various ways, even though the access is 10/100/1GE. This is particularly useful on the second Ethernet port when connected to user LANs where the main link to the network could be “swamped” by data from attached devices.


PacketBand can be locally or remotely configured using easy-to-use high functionality DbManager GUI software. DbLite is supplied free with each unit. Optionally available are different versions to support requirements for larger or more integrated networks. It is sophisticated but simple to use via an intuitive Graphical User Interface (GUI) which controls, configures and monitors individual units and complete networks, currently Microsoft-based, it can also generate SNMP Traps and Alarms. The DbManager supplied with PacketBand (DbLite) allows control and visibility of a single PacketBand at any one time via a single PC. Other options support multiple real-time work-stations, a network of PacketBands and links, and have additional capabilities such as SNMP Traps & Alarms and continuous polling of devices. A document identifying the differences between DbLite and other versions is available.

Used by various organisations with different network sizes - up to and including carriers - versions of DbManager deliver a network wide view of all PacketBands and links via a 4-layer “tree structured” overview. The status of all PacketBands and links are easy to identify with Alarms being colour coded and passed up the tree. Separate windows provide Event and Alarm information with the ability for operators to add comments etc. Different access levels and passwords provide operators with appropriate capabilities within the program. An option to encrypt the management traffic across the packet network is available, together with a key management and update system. Demonstration software is available which illustrates both the
DbManager and the PacketBand features. Please ask for more information.


A. Clock Recovery
Advanced algorithms tunable for different network characteristics as standard. Capable of exceeding G.823 Synchronous Interface requirements (subject to network performance)

B. TDM port (E1)

  • RJ45 connector
  • Presents as DCE (crossed cable for DTE)
  • 120 Ohm
  • 75 Ohm user-selectable via converter cable
  • G.703 unstructured
  • G.704 channelised
  • ITU G.706
  • Selectable CRC4/non-CRC4
  • HDB3
  • Transparent to user signaling

C. TDM port (T1)

  • RJ45 connector
  • Presents as DCE (crossed cable for DTE)
  • 100 Ohm
  • Unframed 1.544Mbps
  • Framed 1.536Mbps (robbed-bit)
  • ESF or D4 selectable
  • B8ZS or AMI selectable
  • Transparent to user signaling

D. Ethernet Interfaces

  • 2 x RJ45 UTP
  • 10/100/1GE
  • Auto-sensing or manual
  • Optional SFP cage (module not supplied) for various fibre modes
  • 1 network and 1 or 2 user ports (second port using SFP)

E. Local Management Port

  • RJ12
  • Asynchronous
  • Auto-sensing to 115kbps
  • Also remote access via packet network

F. Oscillator Performance*

  • Hold-over 24hrs 0.5ppm
  • Aging per day 20ppb
  • Temperature Stability 0.600ppm


  • Hold-over 24hrs 4ppb
  • Aging per day 0.5ppb
  • Temperature Stability 14ppb


  • Hold-over 24hrs 10ppb
  • Aging per day 0.3ppb
  • Temperature Stability 10ppb

(* Figures based on typical parts and performances. Individual oscillators may vary slightly either way. Temperature Stability range -5DegC to +70DegC assumes 20 minutes from power on. Aging and holdover at constant temperature)

G. IP & MAC Address

  • Single MAC address, IP address, subnet mask and default gateway
  • Support for DHCP

H. Configuration
Held in non-volitile memory

I. Power (AC)

  • Internal via IEC connector
  • Auto-sensing 96VAC-240VAC
  • Max consumption 0.2Amps RMS @230VAC
  • MTBF 400,000hrs

J. Power (DC)

  • 1. Nominal -48VDC, 4mm terminal block, -33VDC to -75VDC, 0.35A max, MTBF 1,790,000hrs
  • 2. Nominal -24VDC, 4mm terminal block, -18VDC to -75VDC, 0.55A max, MTBF 800,000hrs

K. Dimensions & Environment

  • Metal chassis and front/rear panels
  • W – 225; D – 200; H – 44mm
  • Weight – 0.9Kg/2lb
  • Optional 19” rack-mount kit; 1 unit per 1U or 2 units side-by-side per 1U
  • Operating Temperature -20°C to +55°C
  • Humidity 10-90% non-condensing

L. Maintenance
There are no serviceable parts or maintenance required

M. Approvals

  • EMC
  • EN55022:1988
  • EN55014:1988
  • EN61000-3-2/3:1995
  • AS/NZ CISPR22:2000
  • FCC Part 15(B)
  • RoSH Compliant without the use of exceptions

N. Safety

  • EC EN60950-1:2002
  • ACA TS001:1997
  • ACS/NZ60950:2000
  • AS/NZS3260:1993
  • IEC950

Live Demo of FRM220 Chassis

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