33
Installing the 7800 Series Telecom Units
4.3.3
OC3/STM-1 Interface for the TMG7800-STM1
This section describes the connection to OC3/STM-1 interfaces using three methods:
•
Standalone (without a patch panel)
•
1+1 protection (with a 1+1 patch panel)
•
N+1 protection (with an N+1 patch panel)
Refer to
table
4.1 on page
33 for a listing of supported STM-1 interfaces. The default SFP module for
OC3/STM1 connection is SMF, intermediate reach, (SFP-OC3-IR1) 1310 nm with LC type connectors.
Note
Make certain that the correct SFP model is selected at the time of ordering. If your
installation requires a different model from the one that has been provided, you must
replace it.
Table
4.1
STM-1
Interfaces
A TMG7800-STM1, with one main and one backup APS OC3 or STM1 port enables connection to
OC3/STM1 lines. See
figure
4.7 on page
34.The APS port is used for OC3/STM1 redundancy.
Switchover occurs automatically based on configurable parameters. It is recommended that APS be
used if the installation provides this feature.
Note
The TMG7800-STM1 features 2 RJ48C connectors that can be used to synchronize the
TDM network (BITS interface) or to carry E1/T1 signaling.
Transceiver Model
Description
Spec
Mode
Type
Range
(Km.)
Wavelength
(NM)
Connection
SFP-OC3-IR1
OC3/STM1
Hot Pluggable
Single-mode
Intermediate reach
15
1310
LC
SFP-STM1E
STM1E (Electrical)
Hot Pluggable
75 ohms Cooper
Max 180m
1
NA
DIN 1.0/2.3
