:$1&LU XLW&RQILJXUDWLRQ¦0RGLI\ 135'6/'$&6$GPLQLVWUDWRUVª5HIHUHQ H*XLGH 18 • T1/E1 Link• YellowFormatFrame12FS(3)—FS bit of frame 12)'/ GV[)'/ This describes which implementation of FDL is being used, if any. FDL applies only to T1 circuits.• other(1)—Indicates that a protocol other than one following is used.• dsx1Ansi-T1-403(2)—Refers to the FDL exchange recommended by ANSI.• dsx1Att-54016(3)—Refers to ESF FDL exchanges.• dsx1Fdl-none(4)—Indicates that the device does not use the FDL.Test SettingsThis portion of the :$1&LU XLW&RQILJXUDWLRQ window contains information described in the followingsections.)RUH This variable identifies which standard will be used to transmit and identify the Yellow Alarm.• linkYellowAuto—Do not force the transmission of a yellow alarm. But, yellow alarm may be automaticallytransmitted.• linkYellowOn—Force the transmission of a yellow alarm even if the received signal is in frame.• linkYellowDisable—Do NOT transmit a yellow alarm even if the received signal is out of frame./RRSEDN &RQILJ GV[/RRSEDN&RQILJ This variable represents the loopback configuration of the DS1 interface. Agents supporting read/write accessshould return badValue in response to a requested loopback state that the interface does not support. The val-ues mean:• dsx1NoLoop—Not in the loopback state. A device that is not capable of performing a loopback on theinterface shall always return this as it's value.• dsx1PayloadLoop—The received signal at this interface is looped through the device. Typically the receivedsignal is looped back for retransmission after it has passed through the device's framing function.• dsx1LineLoop—The received signal at this interface does not go through the device (minimum penetra-tion) but is looped back out.• dsx1OtherLoop—Loopbacks that are not defined here.6HQG &RGH GV[6HQG&RGH This variable indicates what type of code is being sent across the DS1 interface by the device. The values mean:• dsx1SendNoCode—Sending looped or normal data• dsx1SendLineCode—Sending a request for a line loopback• dsx1SendPayloadCode—Sending a request for a payload loopback• dsx1SendResetCode—Sending a loopback termination request• dsx1SendQRS—Sending a Quasi-Random Signal (QRS) test pattern
