Complete the NTP-J22 Log into CTC procedure at a node where you want to set up timing parameters.|
Go to the Node View. |
||Click the Provisioning > Timing > General tabs.|
||In Timing Standard area, Click Change button to change the Current Timing Standard. |
The "Change Timing Standard" dialog box appears.
Select the SONET or SDH radio button as required. Click OK.|
|| In the General Timing section, complete the following information: |
- Timing Mode—Choose External if the CPT derives its timing from a BITS source; choose Line if timing is derived from the line card that is connected to the timing node. A third option, Mixed, allows you to set both external and line timing references.
Because Mixed timing might cause timing loops, we do not recommend its use. Use this mode with care.
- SSM Message Set—Choose either Generation 1 or Generation 2 synchronization status messaging (SSM) option if the Timing Standard selected is SONET.
- Quality of RES—Sets the timing quality for the user-defined, reserved (RES) QL value if your timing sources supports RES. Most timing sources do not use RES. If it does not support RES, choose RES=DUS (do not use for timing reference). Qualities are displayed in the descending quality order as ranges. For example, in Generation 1 SSM, ST3<RES<ST2 means that the timing reference RES is higher than a Stratum 3 (ST3) and lower than a Stratum 2 (ST2). If the Timing Standard selected is SDH, RES is not supported.
- Revertive—Check this check box if you want the CPT to revert to a
primary reference source after the conditions that caused it to
switch to a secondary timing reference are corrected.
- Reversion Time—Check this check box and choose the amount of time that the CPT system should wait before reverting to its primary timing source. The default value is 5 minutes.
|| Click the BITS Facilities tab. |
The BITS Facilities section sets the parameters for your BITS-1 and BITS-2 timing references. Many of these settings are determined by the timing source manufacturer. If equipment is timed through BITS Out, you can set timing parameters to meet the requirements of the equipment.
||In the BITS In area, complete the following information: |
- Facility Type—(TNC/TSC/TNC-E/TSC-E only) Choose the BITS signal type supported by your BITS clock, either DS1 or 64Khz+8Khz.
- BITS In State—Set the BITS In state for BITS-1, BITS-2, or both, to IS (in service) if Timing Mode is set to External or Mixed, depending on whether one or both BITS input pin pairs are connected to the external timing source. If Timing Mode is set to Line, set the BITS In state to OOS (out of service).
|| If the BITS In state is set to OOS, continue with Step 12. If the BITS In state is set to IS, complete the following information: |
- Coding—Choose the coding used by your BITS reference, either B8ZS (binary 8-zero substitution) or AMI (alternate mark inversion).
- Framing—Choose the framing used by your BITS reference, either ESF (Extended Super Frame) or SF (D4) (Super Frame).
- Sync Messaging—Check this check box to enable SSM. SSM is not available if framing is set to Super Frame.
- Admin SSM—Choose the SSM Generation 2 type fromt the drop-down list if the SyncE Messaging check box is unchecked. Available options are PRS (Primary reference source; Stratum 1), ST2 (Stratum 2), TNC (Transit Node Clock), ST3E (Stratum 3E), ST3 (Stratum 3), SMC (SONET minimum clock), and ST4 (Stratum 4).
In the BITS Out area, complete the following information, as needed: |
- Facility Type—(TNC/TSC only) Choose the BITS Out signal type, either DS1 or 64Khz+8Khz.
- BITS Out state—Set the BITS Out state for BITS-1, BITS-2, or both to IS ((depending on which BITS Out pins are used for the external equipment): if the equipment is connected to the BITS output pins of the node on the backplane (ANSI) or MIC-C/T/P FMEC (ETSI); and to time the equipment from a node reference. If equipment is not attached to the BITS output pins, set the BITS Out state to OOS.
|| If the BITS Out state is set to OOS, continue with Step 12. If the BITS Out state is set to IS, complete the following information: |
- Coding—Choose the coding used by your BITS reference, either B8ZS or AMI.
- Framing—Choose the framing used by your BITS reference, either ESF or SF (D4).
- AIS Threshold—Choose the quality level where a node sends an alarm indication signal (AIS) from the BITS 1 Out and BITS 2 Out backplane pins (ANSI) or MIC-C/T/P FMEC (ETSI), if SSM is disabled or Super Frame is used. An AIS alarm is raised when the optical source for the BITS reference falls to or below the SSM quality level defined in this field.
- LBO—Set the line build-out (LBO) distance between the ONS 15454 and an external device, if an external device is connected to the BITS Out pins. If an external device is connected to BITS Out, choose the distance between the device and the CPT system. Options are: 0-133 ft (default), 134-266 ft, 267-399 ft, 400-533 ft, and 534-655 ft. LBO relates to the BITS cable length. If an external device is not connected to BITS Out, leave this field set to the default.
||Return to your originating procedure (NTP).|