Alcatel-Lucent 7710 SR Configuration Manual page 315

Cisco HDLC monitors line status on a serial interface by exchanging keepalive request messages with peer
network devices. It also allows routers to discover IP addresses of neighbors by exchanging Serial Link
Address Resolution Protocol (SLARP) address-request and address-response messages with peer network.
Only IES SAPs (including SAPs in VPRN service) can provision a Cisco-HDLC-capable configuration.
clock-source
Syntax clock-source {loop-timed | node-timed | adaptive | differential}
Context config>port>tdm>ds1
config>port>tdm>ds3
config>port>tdm>e1
config>port>tdm>e3
Description
This command configures the clock to be used for transmission of data out towards the line. The options are
to use the locally recovered clock from the line's receive data stream, the node central reference, or an
adaptively recovered clock using the received packets.
The following tables show MDAs that support loop timing at DS3/E3 and DS1/E1 channelization options.
Channelized OC-12
Channelized OC-3
Channelized DS3/E3
Channelized ASAP OC-12
Channelized ASAP OC-3
Channelized ASAP DS3/E3
CES OC-3
7710 SR OS Interface Configuration Guide
TDM DS3/E3 LoopTimed
No
No
No
Yes
Yes
Yes
Yes
Interface Configuration
Default
node-timed
node-timed
node-timed
node-timed
node-timed
node-timed
node-timed
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