Specifications

Figure 10–1.
DE1/DS1 Transceiver Interface Connector. (See
Figs. 10-5 & 10-7 for aux. electrical transceiver
interfaces.
Note: external ground must be connected.)
3. Energize the chassis.
Energize the FOCUS chassis by applying
power.
When you first energize the chassis, and thus
the DE1 Transceiver Module, the red/green
status LED is red. If the module is functional,
the status LED turns green within 20 seconds.
If the module is non-functional, the status
LED stays red, even after 20 seconds have
elapsed.
10.3.2 Software Settings
No software settings are required to install a
FOCUS Transceiver Module. If the system
supplied includes transceiver modules with the
ability to disable individual transceivers and the
FOCUS firmware also supports this (as noted
below) then the user may disable one or both
transceivers on the modules using the FCS version
3.11 or greater. FOCUS firmware supporting the
programmable transceiver is as follows;
• MV3 ≥ 3.10
• MV4 ≥ 4.12
• MV5 ≥ 5.0
4&17—Transmitter 1-1
3&16—Receiver 1-1
2&15 — Transmitter 1-2
1&14 — Receiver 1-2
10 & 22 — Transmitter 2-1
11 & 23 — Receiver 2-1
12 & 24 — Transmitter 2-2
13 & 25 — Receiver 2-2
(RX1-2) 1
(TX1-2) 2
(RX1-1) 3
(TX1-1) 4
(N/C) 5
(N/C) 6
(N/C) 7
(N/C) 8
(N/C) 9
(TX2-1) 10
(RX2-1) 11
(TX2-2) 12
14 (RX1-2)
XCVR 1-1 Pin Assignments
XCVR 1-2 Pin Assignments
XCVR 2-1 Pin Assignments
XCVR 2-2 Pin Assignments
15 (TX1-2)
16 (RX1-1)
17 (TX1-1)
18 (N/C)
19 (N/C)
20 (N/C)
21 (N/C)
22 (TX2-1)
23 (RX2-1)
24 (TX2-2)
25 (RX2-2)
(RX2-2) 13
When you install a standard dual transceiver,
(i.e. one without the programmable feature to
disable one or both transceivers), & you
connect just one of the transceivers, you
must jumper the unused transmitter to the
unused receiver using an external jumper.
This will avoid unwanted alarms & ensure
proper operation. With FFHS or standard hot
standby systems, however, you must connect
all fiber connections correctly, without
external loopback jumpers to ensure proper
operation.
NOTE
December 2008 Page 10–3
Chapter 10. Electrical Transceiver Module
10
Table 10–1.
DE1 Transceiver Module Specifications
Interface 75 Ω unbalanced (coax)
120
Ω balanced (twisted pair)
100
Ω 4-wire balanced(DS1),
DS1 (max. length=50’/15m)
DE1 (max. length=133’/40m)
Line Format B8ZS (T1), HDB3 (E1)
Frame Format ESF (T1), Multi-frame, (E1)
Connector DB25 Female on rear of
chassis or
BNC or DB15 or RJ-45C
(see Fig. 10-4 & 10-6)
Indicators Status LED
Low signal on 1
Low signal on 2
Pulse Shape ITU-T G.703 (E1)
AT&T 61411 (T1)
Input Atten. 3dB at 1,024kHz
Minimum 10dB average
Return Loss 51kHz - 3,072kHz at
100Ω or 120Ω