Lucent Technologies 7820-0802-003 manual Configuring the clock source

Configuring E1 FrameLine Cards (MAX TNT, DSLTNT)

Configuring the clock source

Configuring the clock source

The E1 FrameLine slot card uses the same system-wide PLL synchronous clock source for DS1 transmission as do the eight-port T1 and E1 cards. Any of the lines can serve as the clock source for the unit. To configure the E1 FrameLine card’s clock source, use the same parameters (Clock-Source and Clock-Priority) that you use for other cards.

All 10 lines must use the same clock source. Clocking on a per-line basis is not supported. The clock source can be one of the 10 lines, or a line on another slot card, or it can be internally generated from the primary shelf controller. Using the internal clock is generally not recommended.

In addition, if the system clock source is from one of the 10 lines, it affects the timing on the TDM backplane, because TDM timing is based on the clock source. This relationship exists even though the E1 FrameLine slot card does not use the TDM backplane.

10-6 APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide