Black Box LRU4240 - Manual (Page 114)

102 SALES: 0870 90 10 750 Dual Trunk E1 Router User’s Guide
Dual Trunk E1 Router
C
OMMUNICATION
P
ORT
P
IN
A
SSIGNMENTS
Table B-7 describes the COMM Port (RJ45) pin assignments.
DE-9 to DB-25 Adapter Pin Assignments
BlackBox can provide a DE-9 to DB-25 adapter for the BlackBox DE-9 COMM Port ribbon cable.
The pinout assignments for the adapter are listed in Table B-8 below.
Table B-2 Communication Port Pin Assignments
RJ45 Pins Signal Description
3 SD Send Data (from Dual Trunk E1 Router to terminal)
6 RD Receive Data (from terminal to Dual Trunk E1 Router)
8
1
1. CTS is used by the Dual Trunk E1 Router as a collision avoidance line. This line should not be
connected at the CRT terminal end of the COMM Port cable.
CTS Clear To Send (I/O to all Dual Trunk E1 Routers only)
4, 5 SG Signal Ground (bi-directional)
7 DCD Carrier Detect
Table B-3 DE-9 to DB-25 Adapter Pinouts
DE-9 DB-25
3 2
2 3
7 4
8 5
6 6
5 7
1 8
9 23
4 21