Nokia 7705 SAR - Page 474

7705 SAR Interfaces
474
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
ssm-bit
Syntax ssm-bit sa-bit
no ssm-bit
Context config>port>tdm>e1>ssm
Description This command configures which Sa bit in the E1 frame to use for conveying the quality level
SSM information.
Default 8
Parameters sa-bit — identifies which Sa bit to use for SSM information
Values 4 to 8
tx-dus
Syntax [no] tx-dus
Context config>port>tdm>e1>ssm
Description This command enables or disables the transmission of 0xF (DUS) (do not use for
synchronization) in the SSM channel. The code 0xF is transmitted but it is translated to DNU
(do not use) for E1 or SDH and to DUS for SONET or T1.
Default no tx-dus
threshold
Syntax threshold {ber-sd | ber-sf} rate threshold-rate
no threshold {ber-sd | ber-sf}
Context config>port>tdm>ds1
config>port>tdm>e1
Description This command configures the line signal degradation (SD) bit error rate (BER) and line signal
failure (SF) thresholds.
PCV error rates are measured and when they cross either the degradation or failure
threshold, alarms are raised.
Note: Only g704 framing mode should be used with E1 SSM. The no-crc-g704 and
e1-unframed framing modes are not compatible with E1 SSM. See the framing (E1)
command for information on E1 framing.