Cisco 6504-E User Guide - Page 246

C6576M OSM Channelized SONET Interface Dialog Box Chapter 5 Physical Object Dialog Boxes - loopTimingSecondary-Indicates that loop timing is used and the SONET controller provides the clock if the primary clock source fails. - Primary-Indicates that the SONET controller provides the first priority clock for internal circuitry. Secondary indicates that the SONET controller provides the clock if the primary clock source fails. - localTiming-Indicates that the transmit clock source is generated internally. - localTimingPrimary-Indicates that local timing is used and the SONET controller provides the first priority clock for internal circuitry. - localTimingSecondary-Indicates that local timing is used and the SONET controller provides the clock if the primary clock source fails. • Loopback Mode-Indicates whether or not SONET loopback mode is enabled. The possible values are: - None-Indicates that the loopback is disabled. - Internal-Indicates data is looped from the transmit path to the receive path allowing diagnostics to send data to itself without relying on any external connections. To enable internal loopback, you must first set the clock source to internal. - Line-(external) Indicates data is looped from the external port to the transmit port and back out the external port. • Framing-Framing for optical digital transmission. Note SDH framing is currently unsupported on the channelized SONET modules even though IOS CLI allows the interface to be configured for SDH framing. SONET Medium Area The SONET Medium area contains the following information. All attributes in this area are read-only. • Type-Indicates whether a SONET or SDH signal is used on the interface. • Line Type-Line type of the interface. The following values are possible: - sonetShortSingleMode - sonetLongSingleMode - sonetMultiMode • Line Coding-Line coding for the interface. - sonetMediumB3ZS-For electrical SONET/SDH signals (STS-1 and STS-3). - sonetMediumCMI-For electrical SONET/SDH signals (STS-1 and STS-3). - sonetMediumNRZ-Non-return to zero, which is used for optical SONET/SDH signals. - sonetMediumRZ-Return to zero, which is used for optical SONET/SDH signals. - sonetMediumOther-Other. DS-3/OC-3 Channel Table Area • DS-3/OC-3 Channel Table-Lists the DS3 and OC-3 channels that have been provisioned on the SONET interface. The following items are listed in the table: 5-132 Cisco 6500/7600 Series Manager User Guide