End User Premises | | |
ATA Voice over fibre | | Analogue interface compliant with PTC 220, section 5 |
Handover Point | | |
UFB Handover Connection | | 802.1ad VLAN or double-tagged QnQ |
Voice | | |
Line and information signalling | | Ringing cadences as specified in Telecom Network Advisory Specification TNA 102 Dial tone spec, incl stutter dial tone for MWI |
Codec | | G.711a codec at 10ms sampling rate. 200-byte packet metric. Maximum delay allowance for jitter of 20ms. |
Voice band dRGW support | | DTMF in band and RFC 4733 Transmission characteristics capable of supporting minimum 14.4kb/s voice band dRGW transmission for fax and modems |
SIP | | RFC 3261 SIP: Session Initiation Protocol, June 2002 |
Fibre | | |
Fibre | | External fibre must comply with ITU-T specification G.652D or 657A. Internal building fibre cables must meet appropriate fire regulations i.e. be Flame-Retardant, Non-Corrosive, Low-Smoke, Zero-Halogen (FRNC/LSZH) |
Connector Type | | Fibre terminations must be SC/APC type connectors (complying with the IEC 61754-4 standard) or alternatively LC/APC also known as LCA type connectors (complying with the IEC 61754-20 standard) as appropriate. |
Optic Path | | Optical and path characteristics are expected to be designed to a minimum standard contained in either the IEEE 802.3 Section 5 standard or the ITU-T G.984 standard. |
Fibre Testing Layer 1 | | All commissioning Layer 1 network testing (LFC site OFDF to end of Communal Network) is by OTDR at two wavelengths, 1310nm and 1550nm using Bi-Directional method in accordance with Chorus standard described in ND0556. The methodology used will be based on bi-directionally testing all fibres in the Communal Network required to complete the service. Network test results are provided by agreement verifying performance features. Refer to the Direct Fibre Services Operations Manual for details. All Layer 1 network restoration testing will be LFC site OFDF to Premises termination point. Testing for power loss will be at either 1310nm or 1550nm. In the event of a fault, restoration testing will be to the standard in Optical Performance table below. The wavelengths of 1625nm and 1650nm are reserved for network maintenance testing purposes, (live GPON network) compliant with ITU-T L.41. |
Optical Path Performace | | Communal Network performance Total GPON Insertion Loss (ITU-T G984) = ≤ 28.5db Network Return Loss = ≥32db LFC GPON system margin (lifetime ageing factor) = 1.5db Total GPON insertion Loss OLT to ONT design target is = ≤ 27.0db (28.5db – 1.5db) Optical Fibre Attenuation Co-Efficient (L) (ITU-T G.652. & G657.A) = ≤ 0.4db/km Splice Loss (S) = ≤ 0.15db Mated Connector loss (C) = ≤ 0.3db Mated Connector Reflection = ≥55db Total Insertion Loss of network (IL) is calculated from IL = 0.4L + 0.15S + 0.3C (excluding PON splitter) |