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CPE requirements for Bitstream FTTx Table of contents 1
Scope/Field of application
2
2
Definitions
3
3 3.1 3.2 3.3
CPE requirements Electrical WAN interface Optical interface Service VLAN handling
4 4 5 6
4
Abbreviations
7
TeliaSonera AB, Networks
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Revision history 2010-09-15: Rev 1.0, First version.
1
Scope/Field of application
This document specifies a set of requirements for a CPE supporting multiple services in TeliaSonera’s FTTx based access network. The specification is limited to the CPE’s interface towards the network since that is the only relevant part for the handover of the bitstream service. The remaining specifications for the CPE, such as functionality, design, performance and so on is up to the service provider to decide upon. The service provider is also responsible for making sure that the CPE complies with all relevant EMC directives, environmental standards, etc.
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Definitions
Figure 1 FTTx system reference configuration
The FTTx system reference configuration is shown in figure 1. The customer is either connected to the access node AN via an optical or an electrical Ethernet interface. In the optical access case, there is a fiber socket near to the incoming cable. In the electrical case, there is a fixed mounted media converter MC on the customer’s premises for transformation of the optical interface into an electrical Ethernet interface. The CPE has a WAN interface with one electrical or optical Ethernet port and a LAN interface with one or several electrical or wireless Ethernet ports. The WAN interface is connected to the access network directly or via a media converter. The LAN interface is connected to the customer’s network equipment such as personal computers (PC) for Internet access, set-top boxes (STB) for IPTV and analogue terminal adapters (ATA) for VoIP. If there is no existing media converter on site, a technician will be needed to install a media converter or, if the service provider has one, a CPE with an optical WAN interface.
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CPE requirements
The purpose of the CPE is mainly to separate the different services on the WAN interface and making sure that sensitive services such as VoIP gets priority. Apart from that and depending on how the services are being offered, the CPE can act as an ATA, WLAN base, NAT, firewall, etc. It is however up to the service provider to decide what to do with the traffic in the CPE once it has passed through the WAN interface.
3.1
Electrical WAN interface
The following requirements are valid for a CPE with an electrical WAN interface: CPE 001
The WAN interface must have an electrical RJ45 connector with wiring according to TIA/EIA-568-B.
CPE 002
The WAN interface must support 100Base-TX Ethernet with full duplex and autonegotiation according to IEEE 802.3u and IEEE 802.3x.
CPE 003
The WAN interface may also support 1000Base-T Ethernet with full duplex and autonegotiation according to IEEE 802.3ab. The interface must be able to negotiate down to 100Base-TX.
CPE 004
The WAN interface should support automatic MDI crossover.
CPE 005
The WAN interface must support Ethernet VLAN trunking according to IEEE 802.1Q.
Figure 2 WAN interface
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T19572-10 CPE 006
The WAN interface must be able to handle both IEEE 802.1Q tagged and untagged Ethernet frames according to figure 2.
CPE 007
The WAN interface must be able to handle priority tagged frames according to IEEE 802.1p.
CPE 008
There should be a LED indicator on the CPE that indicates the link status of the WAN interface.
3.2
Optical interface
The service provider must install a fixed media converter or a fixed CPE with optical WAN interface in those cases where the customer only has the fiber socket. The following requirements are valid for a media converter or a CPE with an optical WAN interface: CPE 101
The optical interface must have a female SC connector.
CPE 102
The CPE or media converter casing must provide mechanical protection and retention for the fiber. The end-customer must not be able to touch the fiber nor the optical connector.
CPE 103
The optical interface must support 100Base-BX10U with TX 1310 nm and RX 1550 nm.
CPE 104
The optical interface may also support 1000Base-BX10U with TX1310 nm and RX 1490 – 1550 nm. The interface must in this case be able to negotiate down to 100Base-BX10U.
CPE 105
The optical interface must support Ethernet VLAN trunking according to IEEE 802.1Q.
CPE 106
The optical interface must be able to handle both IEEE 802.1Q tagged and untagged Ethernet frames according to figure 2.
CPE 107
The optical interface must be able to handle priority tagged frames according to IEEE 802.1p.
CPE 108
There should be a LED indicator on the CPE or media converter that indicates the link status of the optical interface.
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3.3
Service VLAN handling
The different service VLANs are delivered on the WAN interface as shown in figure 2. It should be noted that, since the Internet access service is always delivered as untagged, the CPE is not required if no other services is to be delivered. The following CPE requirements are valid for the service VLAN handling: CPE 201
The CPE must be able to send and receive Ethernet frames related to the Internet access service as untagged Ethernet frames on the WAN interface.
CPE 202
If applicable, the CPE must be able to send and receive Ethernet frames related to the IPTV service as tagged Ethernet frames on the WAN interface. The IPTV VLAN number varies geographically and must be set through the CPE management.
CPE 203
If applicable, the CPE must be able to send and receive Ethernet frames related to the VoIP service as tagged Ethernet frames on the WAN interface. The VoIP VLAN number varies geographically and must be set through the CPE management.
CPE 204
The CPE must be able to send and receive Ethernet frames related to the CPE management service as tagged Ethernet frames on the WAN interface. The management VLAN number is fixed for each service provider and must be factory preset in the CPE.
CPE 205
The CPE must not bridge any of the VLANs together.
The VLAN numbers are assigned by TeliaSonera. Each service provider that needs to use a CPE will be assigned a unique management VLAN number. The VLAN numbers for the IPTV and VoIP services will vary depending on where the endcustomer is located. TeliaSonera will provide information on which VLANs are valid in which geographical areas.
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Abbreviations
AN ATA CPE EMC IEEE IP IPTV LAN MC MDI NAT PC STB UTP VLAN VoIP WAN WLAN
Access Node Analogue Terminal Adapter Customer Premises Equipment Electromagnetic Compatibility Institute of Electrical and Electronics Engineers Internet Protocol Internet Protocol Television Local Area Network Media Converter Medium-Dependent Interface Network Address Translation Personal Computer Set-Top Box Unshielded Twisted Pair Virtual LAN Voice over IP Wide Area Network Wireless LAN
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