General DataComm Xedge 6000 Series Hardware Installation page 149

Network Timing Modules
Jumpers
The NTM-T1 module (revision T- and above) provides signal reflection control for improved signal
integrity. This capability requires setting the X16 jumper to correspond to the position of the card
in the primary (PRI) or secondary (SEC) NTM slots in the chassis.
• Set X16 jumper at PRI (pins 1-2) for a single NTM-T1 in a nonredundant
arrangement, or for the primary NTM-T1 in a redundant arrangement.
• Set X16 jumper at SEC (pins 2-3) for the secondary NTM-T1 in a redundant
arrangement.
Figure 6-2
Cabling
The NTM-DS1 uses 100 ohm shielded twisted pair each for transmit and receive, following
The maximum insertion loss is 2.8 db at 772 kHz. The cables terminate with male DB15 connectors.
Table 6-1 lists pinout designations for the front panel connectors.
Table 6-1
DS1 Node Timing Module
Connector
Received Clock Input
(RC IN)
Derived Clock Output
(DR OUT)
032R440-000
Issue 17
PRI SEC
X16
NTM-T1 Jumper Positions
Signal Name
Transmit Signal
Transmit Return
Receive Signal
Receive Return
Chassis Ground
Transmit Signal
Transmit Return
Receive Signal
Receive Return
Chassis Ground
Xedge 6000 Hardware
Installation & Setup Guide
DS1 Node Timing Module (NTM-DS1)
Pin Number
1
9
3
11
shield
1
9
3
11
shield
law.
F
6-3