- General Information
- Manufacturer
- Ciena Corporation
- Manufacturer Website Address
- http://www.ciena.com
- Brand Name
- Ciena
- Product Type
- SFP (mini-GBIC)
Ciena's XCVR-TDM2GE and XCVR-TDM4GE Transceivers enable cost-effective transport of T1/E1 streams over packet.
The Small Form-factor Pluggable (SFP) modules convert either a T1 (XCVR- TDM4GE) or E1 (XCVR-TDM2GE) stream into fixed-length packets for transmission over a Packet-Switched Network (PSN). Legacy Time Division Multiplexed (TDM) services can thus be transported over an Ethernet or IP/MPLS network. Packets are transmitted via a 1 Gigabit Ethernet (GbE) port on the host device through one or more PSNs (in the case of multiple operators, for example). At the remote end, packets are converted back to TDM traffic for handoff as TDM services.
TDM to packet modernization
With many network operators transforming their networks to all-packet transport, TDM over packet emerges as a key enabler to efficiently migrate legacy services to the new packet-based infrastructure. Using a single unified network for both data and TDM transport can streamline operations and reduce capital and operational expenditures.
The packet-based network allows for greater economies of scale for multiple service types (video, voice, mobile, etc.) while still accommodating the need to reliably carry legacy traffic from TDM interfaces, which are likely still in use in many enterprise and industrial scenarios. Whether servicing traditional PBX units, utility teleprotection relays, digitized voice equipment, or Supervisory Control and Data Acquisition (SCADA) systems, low- to moderate-speed TDM end-points will remain common interfaces into the modernized network for decades to come. These services will need to be accommodated within the same infrastructure as the growing data network to remain cost-effective while not sacrificing the highest reliability these systems require.
Cost-effective yet reliable TDM migration
The XCVR-TDM4GE provides an T1 interface via a RJ45 100-Ohm balanced connector capable of up to 200m reach. The XCVR-TDM2GE provides a E1 interface via RJ45 120-Ohm balanced connector capable of 100m reach. Both map their client signals into pseudowire streams using RFC 4553 SAToP to be transported across an Ethernet network.
To transport T1/E1 circuits through a packet-oriented network, the user payload is broken into fragments and a SAToP encapsulation header is prepended to each fragment. In this method of encapsulating TDM, only structure- agnostic transport is addressed; that is, the protocol completely disregards any structure that may be imposed on these signals, in particular the structure imposed by standard TDM framing. SAToP is used over packet-switched networks, where the Provider Edge (PE) devices do not need to interpret TDM data or participate in the TDM signaling. TDM endpoints connect over TDM E1/T1 circuits, but the circuits physically terminate at each packet device capable of SAToP. Ciena's device transports TDM frames across the PSN core via pseudowires to the remote SAToP endpoint so the TDM endpoints can communicate as if they were directly connected by physical circuits.
- Technical Information
- Data Link Protocol
- TDM
- PDH
- Application/Usage
- Data Networking
- Optical Network
- Interfaces/Ports
- Total Number of Ports
- 1
- Connector Type
- RJ-45
- Interfaces/Ports Details
- 1 x RJ-45 T1 Network LAN
- Media & Performance
- Media Type Supported
- Twisted Pair
- Ethernet Technology
- Gigabit Ethernet
- Network Technology
- 1000Base-X
- T1
- Maximum Distance Supported
- 200 m
- Maximum Data Transfer Rate
- 1.54 Mbit/s
- Environmental Conditions
- Minimum Operating Temperature
- -40°C
- Maximum Operating Temperature
- 85°C
- Physical Characteristics
- Form Factor
- Plug-in Module
- Height
- 13.8 mm
- Width
- 13.7 mm
- Miscellaneous
- Compatibility
MSA Compliant
Ciena 3938vi Service Virtualization Switch
Ciena Service Delivery Switches:
- 3904
- 3905
- 3930
- 3931
- 3932
Ciena Service Aggregation Switches:
- 5142
- 5150
- 5160