Verilink PRISM 3030 (34-00208.L) Product Manual - Manual (Page 35)

T1 NET Configuration 25
Framing Type Selects the framing for the network side of the DSU /CSU. The choices are D4 and
ESF.
Line Code Sets the network side line coding. The choices are AMI and B8ZS.
Line Build
Out
Sets the line build out for the network interface. The choices are 0 dB, -7.5 dB,
-15 dB, and -22.5 dB.
Timing Sets the timing source to synchronize the unit’s internal timing generators. In all
cases, slips are controlled to occur on frame boundaries at the network and /or
DSX1 ports when timing synchronization is lost. The choices are as follows.
INTERNAL
The unit’s internal frequency standard is used for all timing.
NETWORK
Timing is derived from the network recovered clock (the most common selection
for most applications).
T1 DTE
The unit synchronizes to the clock recovered from the DSX1 T1 DTE port. This
selection only appears on units equipped with the T1 DTE option.
STATION
Timing is derived from a bipolar- or TTL-compatible clock supplied to the unit
through the rear panel
STA CLK Connector
When this mode is selected, the timing rate must also be set from Station Input
Timing.
SLOT X, PORT Y
Timing is synchronized to the external terminal timing clock supplied from the
DTE and connected to the selected port. Selections only appear for ports installed
in the unit. Ports are indicated as Slot X/Port Y, where X = 2 or 3 and Y = A or B.
Station Input
Timing
Selects the input timing and only appears when Station has been selected from the
Timing menu. The choices are N
×
56 K, N
×
64K, and 1.544 MHz.
Station Timing Selects the N multiple when Station Input Timing is set to either N
×
56K or
N
×
64K and only appears when Station has been selected from the Timing menu.
The N range is 1 to 24. For example, if N= 2 and Station Input Timing is set to
N
×
64K, the unit expects a 128 kHz clock on the station input port (2
×
64 = 128).
PRM Enable This field ENABLEs or DISABLEs the ANSI T1.403 Performance Report
Message functions.