For E1, the connections and signal designations are exactly the same, except that each span
handles 30 separate lines under the E1 transmission protocol. The DCC is dedicated to either a T1
or E1 interface, so the DCC installed in the system depends on the local PSTN standard.
Note:
The terms tip and ring are telephone terms that originated when loop circuit connections were
manually made with phone plugs (that is, tip is positive and ring is the return).
RJ48M Loopback Connector
A special loopback connector is used for loopback or other offline tests. On the loopback connector
(A0898687), the transmit pins of each span are connected to the receive pins of another span. Span
1 is connected to span 2, span 3 to span 4, span 5 to span 6, and span 7 to span 8. The following
table and illustration describe the configuration of the connector.
Line (Span)
Receive
Line (Span)
Transmit
T1 (Tip)
R1 (Ring)
T (Tip)
R (Ring)
1
26
1
2
30
5
2
29
4
1
27
2
3
32
7
4
36
11
4
35
10
3
33
8
5
38
13
6
42
17
6
41
16
5
39
14
7
44
19
8
48
23
8
47
22
7
45
20
Figure 41: Partial Loopback Connector Showing Span 1 connected to Span 2
RJ48M
October 2014
Avaya Media Processing Server 500 Hardware Installation and Maintenance
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