Nokia 7705 - Page 379

Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 379
source-port
Syntax source-port port-id [adaptive]
no source-port
Context config>system>sync-if-timing>ref1
config>system>sync-if-timing>ref2
Description This command configures the source port for timing reference ref1 or ref2.
The timing reference can either be timing extracted from the receive port (line-timed) or
packetized data of a TDM PW (adaptive). If the adaptive option is not selected, the system
uses line timing mode. If the line timing is from a port that becomes unavailable or the link
goes down, then the reference sources are re-evaluated according to the reference order
configured by the ref-order command.
Line timing is supported on T1/E1 ports of the 7705 SAR-M and 7705 SAR-A (variants with
T1/E1 ports) and on the T1/E1 ports of the 7705 SAR-H 4-port T1/E1 and RS-232
Combination module.
Line timing is also supported in the form of synchronous Ethernet on all RJ-45 and optical
SFP Ethernet ports on the 7705 SAR-M (all variants), 7705 SAR-H, 7705 SAR-Hc,
7705 SAR-W, 7705 SAR-Wx (all variants), 7705 SAR-X, and 7705 SAR-Ax. The
7705 SAR-A (all variants) supports line timing on its synchronous Ethernet capable ports
(1 to 8) when they are fixed RJ-45 or optical SFP.
In addition, line timing is supported on the following modules when they are installed in
chassis variants with module slots:
• GPON module via the synchronous downstream 8 kHz GPON physical layer
• 8-port xDSL module (NTR over ADSL2, ADSL2+, or VDSL2)
• 6-port DSL Combination module (two references are available: NTR over SHDSL and
NTR over ADSL2, ADSL2+, or VDSL2)
• 2-port 10GigE (Ethernet) module
• 6-port SAR-M Ethernet module
• 4-port SAR-H Fast Ethernet module
On the 7705 SAR-8 or 7705 SAR-18, line timing is supported on:
• T1/E1 ports on the 16-port T1/E1 ASAP Adapter card and 32-port T1/E1 ASAP Adapter
card (the 16-port T1/E1 ASAP Adapter card, version 1, is not supported on the
7705 SAR-18)
• Ethernet SFP ports with SFPs that support synchronous Ethernet on the 8-port Ethernet
Adapter card (version 2), 6-port Ethernet 10Gbps Adapter card, 8-port Gigabit Ethernet
Adapter card, Packet Microwave Adapter card, 2-port 10GigE (Ethernet) Adapter card,
and 10-port 1GigE/1-port 10GigE X-Adapter card (on the 7705 SAR-18 only)
• SONET/SDH ports on the 4-port OC3/STM1 Clear Channel Adapter card and 2-port
OC3/STM1 Channelized Adapter card
• DS3/E3 ports on the 4-port DS3/E3 Adapter card