Optical
Serial
Port1
Optical
Serial
Port2
Hardware
Edition
E1/T1 Configuration
(future)
Fixed Local Loopback
port1 <-> port3
with serial <-> E1 conversion
E1
Port3
E1
Port4
Fixed Local Loopback
port2 <-> port4
with serial <-> E1 conversion
Figure 8 2-OLS IFM Side View: Local Loopbacks
Following can be configured during service creation:
Optical Serial Ports:
Synchronisation: synchronous or asynchronous;
Synchronous:
Bitrate: [64 (=1*64), 128 (=2*64), 512(=8*64), 1984(=31*64)] kbps;
FM0 Coding (see §2.2.4): disabled/enabled;
Asynchronous:
Bitrate: [1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 297600]
bps; When a bit rate is selected, an incoming serial signal with a lower bitrate
will operate as well, because 2-OLS samples at 6.6 times the selected bitrate;
E1 Ports:
Short Haul (see §2.2.5): unchecked (=default) /checked;
2.2.7
I/O with the Central Switching Module (=CSM)
The CSM is only needed to program the 2-OLS IFM via HiProvision. Once the 2-OLS IFM has
been configured, it does not need the CSM anymore.
2.2.8
Test and Loopback Selftests
Test and Loopback selftests can be performed (via HiProvision) in CESes, e.g when
configuring or troubleshooting a CES. Following two functions can be used in a programmed
CES:
Loopbacks: on backplane or front port, direction towards line (=application) or network
can be configured;
BERT: test traffic generation and verification via Bit Error Ratio Tester.
E1
E1
Optical
Serial
Optical
Serial
E1
T1
SW
2
SW
3
SW
4
SW
5
SW
6
SW
7
SW
8
Interface Module PTN-2-OLS with E1/PTN-2-OLS with T
Release 01 02/2018
11
