Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 469
• 4-port DS3/E3 Adapter card (DS3 ports only)
• 4-port T1/E1 and RS-232 Combination module (T1/E1 ports only)
When an unframed E1 channel is shut down, it sends the AIS pattern to the far-end E1. The
far end does not react to the AIS pattern if the far-end E1 is configured as unframed. If the
far-end E1 is configured as framed, the far end declares AIS. The operational status remains
up and no alarms are generated while the near end is operationally down. This is normal
behavior for unframed G.703 mode.
Default g704
Parameters g704 — configures the E1 port for G.704 framing
no-crc-g704 — configures the E1 port for G.704 framing with no CRC4
e1-unframed — specifies E1 unframed (G.703) mode for E1 interfaces. E1 unframed
mode is only applicable if the encapsulation type is set to cem.
hold-time
Syntax hold-time {[up hold-time-up] [down hold-time-down]}
no hold-time
Context config>port>tdm>ds1
config>port>tdm>e1
Description This command configures the DS1/E1 link dampening timers in 100s of milliseconds, which
guards against reporting excessive interface transitions. Once implemented, subsequent
transitions of the interface from one state to another are not advertised to upper layer
protocols until the configured timer has expired.
Default no hold-time
Parameters hold-time-up — the hold-timer for link-up event dampening. A value of zero (0) indicates
that an up transition is reported immediately.
Values 0 to 100 (in 100 ms)
hold-time-down — the hold-timer for link-down event dampening. A value of zero (0)
indicates that a down transition is reported immediately.
Values 0 to 100 (in 100 ms)
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