Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 79
On the 7705 SAR-8 and 7705 SAR-18, line timing is supported on:
• 16-port T1/E1 ASAP Adapter card (version 1 is not supported on the
7705 SAR-18)
• 32-port T1/E1 ASAP Adapter card
• 8-port Ethernet Adapter card, version 2, on the two Ethernet SFP ports with
SFPs that support synchronous Ethernet
• 6-port Ethernet 10Gbps Adapter card
• 8-port Gigabit Ethernet Adapter card (dual-rate and copper SFPs do not support
synchronous Ethernet)
• 2-port 10GigE (Ethernet) Adapter card
• 10-port 1GigE/1-port 10GigE X-Adapter card (not supported on the
7705 SAR-8)
• 4-port DS3/E3 Adapter card
• 2-port OC3/STM1 Channelized Adapter card
• 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card
• 4-port OC3/STM1 Clear Channel Adapter card
• Packet Microwave Adapter card on ports that support synchronous Ethernet and
on ports that support PCR
Synchronous Ethernet is a variant of line timing and is automatically enabled on ports
and SFPs that support it. The operator can select a synchronous Ethernet port as a
candidate for the timing reference. The recovered timing from this port is then used
to time the system. This ensures that any of the system outputs are locked to a
stable, traceable frequency source.
3.2.5.2 Network Synchronization on SONET/SDH Ports
Each SONET/SDH port can be independently configured to be loop-timed
(recovered from an Rx line) or node-timed (recovered from the SSU in the active
CSM).
A SONET/SDH port’s receive clock rate can be used as a synchronization source for
the node.
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