Automated validation for standalone line-site deployment
Systems and methods for testing Optical Network Elements (ONEs) are provided. A process, according to one implementation, includes switching a first broadband switch of a remote ONE from a first output to a second output. The first output of the first broadband switch enables direct transmission to a line-out port configured for connection with a first fiber span of a pair of external fiber spans. The process also includes switching a second broadband switch of the remote ONE from a first input to a second input. The first input of the second broadband switch enables direct reception from a line-in port configured for connection with a second fiber span of the pair of external fiber spans. Switching the first broadband switch to the second output and switching the second broadband switch to the second input enables propagation through a loopback connection for testing the remote ONE.
1 . An Optical Network Element (ONE) comprising:
a line-out port configured for connection with a first fiber span of a pair of external fiber spans;
a line-in port configured for connection with a second fiber span of the pair of external fiber spans;
a first broadband switch having a first output and a second output, the first output of the first broadband switch coupled directly to the line-out port;
a second broadband switch having a first input and a second input, the first input of the second broadband switch coupled directly to the line-in port;
a loopback connection arranged between the second output of the first broadband switch and the second input of the second broadband switch;
a second line-out port configured for connection with a first fiber span of a second pair of external fiber spans;
a second line-in port configured for connection with a second fiber span of the second pair of external fiber spans;
a third broadband switch having a first output and a second output, the first output of the third broadband switch coupled directly to the second line-out port;
a fourth broadband switch having a first input and a second input, the first input of the fourth broadband switch coupled directly to the second line-in port; and
a second loopback connection arranged between the second output of the third broadband switch and the second input of the fourth broadband switch.
2 . The ONE of claim 1 , wherein switching the first broadband switch to the second output and switching the second broadband switch to the second input causes optical signals to propagate through the loopback connection to enable loopback testing of the ONE.
3 . The ONE of claim 1 , further comprising an optical source configured to produce Amplified Spontaneous Emission (ASE) test signals, wherein, when the first broadband switch is switched to the second output and the second broadband switch is switched to the second input, the ASE test signals are propagated through the loopback connection for testing the ONE.
4 . The ONE of claim 1 , further comprising a Raman amplifier coupled to an output of the second broadband switch.
5 . The ONE of claim 4 , wherein the Raman amplifier includes a plurality of pumps, and wherein, during a loopback test involving the loopback connection, each pump of the Raman amplifier is turned on, one at a time, at a low level.
6 . The ONE of claim 1 , further comprising a pre-amp switch and an amplifier, an output of the pre-amp switch connected to the amplifier, the pre-amp switch configured in either a test power mode or a gain mode, wherein:
in the test power mode, the pre-amp switch is configured to provide Amplified Spontaneous Emission (ASE) test signals to the amplifier for testing the ONE, and
in the gain mode, the pre-amp switch is configured to pass incoming signals to the amplifier for regular amplification.
7 . The ONE of claim 1 , wherein the ONE is one of an Intermediate Line Amplifier (ILA), a Reconfigurable Optical Add/Drop Multiplexer (ROADM) and a Terminal Line Amplifier (TLA).
8 . The ONE of claim 1 , further comprising Optical Supervisory Channel (OSC) and/or telemetry components for monitoring optical signals propagating through the ONE, wherein monitored connectivity and loss parameters are communicated to a remote management system for determining a condition of the ONE.
9 . The ONE of claim 1 , wherein the ONE is part of a network including one or more additional optical network elements each having a loopback connection assembly for enabling loopback testing of different portions of the network.
10 . A method comprising the steps of:
switching a first broadband switch of a remote Optical Network Element (ONE) from a first output to a second output, the first output of the first broadband switch enabling direct transmission to a line-out port configured for connection with a first fiber span of a pair of external fiber spans;
switching a second broadband switch of the remote ONE from a first input to a second input, the first input of the second broadband switch enabling direct reception from a line-in port configured for connection with a second fiber span of the pair of external fiber spans;
wherein switching the first broadband switch to the second output and switching the second broadband switch to the second input enables propagation through a loopback connection for testing the remote ONE;
switching a third broadband switch of the remote ONE from a first output to a second output, the first output of the third broadband switch enabling direct transmission to a second line-out port configured for connection with a first fiber span of a second pair of external fiber spans; and
switching a fourth broadband switch of the remote ONE from a first input to a second input, the first input of the fourth broadband switch enabling direct reception from a second line-in port configured for connection with a second fiber span of the second pair of external fiber spans;
wherein switching the third broadband switch to the second output and switching the fourth broadband switch to the second input enables propagation through a second loopback connection for testing the remote ONE.
11 . The method of claim 10 , further comprising a step of configuring an amplifier of the remote ONE to propagate Amplified Spontaneous Emission (ASE) test signals through the loopback connection for testing the remote ONE.
12 . The method of claim 10 , further comprising a step of turning on a plurality of pumps of a Raman amplifier, coupled to an output of the second broadband switch, one at a time, at a low level, for testing the Raman amplifier.
13 . The method of claim 10 , further comprising steps of:
receiving test parameters from Optical Supervisory Channel (OSC) and telemetry components of the remote ONE, the OSC and telemetry components configured to monitor optical signals propagating through the remote ONE,
determining test results related to connectivity and loss parameters of the remote ONE, and
providing the test results to an installer of the remote ONE while the installer is on site at the remote ONE.
14 . An Optical Network Element (ONE) comprising:
a line-out port configured for connection with a first fiber span of a pair of external fiber spans;
a line-in port configured for connection with a second fiber span of the pair of external fiber spans;
a first broadband switch having a first output and a second output, the first output of the first broadband switch coupled directly to the line-out port;
a second broadband switch having a first input and a second input, the first input of the second broadband switch coupled directly to the line-in port;
a loopback connection arranged between the second output of the first broadband switch and the second input of the second broadband switch; and
a pre-amp switch and an amplifier, an output of the pre-amp switch connected to the amplifier, the pre-amp switch configured in either a test power mode or a gain mode, wherein:
in the test power mode, the pre-amp switch is configured to provide Amplified Spontaneous Emission (ASE) test signals to the amplifier for testing the ONE, and
in the gain mode, the pre-amp switch is configured to pass incoming signals to the amplifier for regular amplification.
15 . The ONE of claim 14 , wherein switching the first broadband switch to the second output and switching the second broadband switch to the second input causes optical signals to propagate through the loopback connection to enable loopback testing of the ONE.
16 . The ONE of claim 14 , further comprising an optical source configured to produce Amplified Spontaneous Emission (ASE) test signals, wherein, when the first broadband switch is switched to the second output and the second broadband switch is switched to the second input, the ASE test signals are propagated through the loopback connection for testing the ONE.
17 . The ONE of claim 14 , further comprising a Raman amplifier coupled to an output of the second broadband switch.
18 . The ONE of claim 1 , wherein the ONE is one of an Intermediate Line Amplifier (ILA), a Reconfigurable Optical Add/Drop Multiplexer (ROADM) and a Terminal Line Amplifier (TLA).
19 . The ONE of claim 14 , further comprising Optical Supervisory Channel (OSC) and/or telemetry components for monitoring optical signals propagating through the ONE, wherein monitored connectivity and loss parameters are communicated to a remote management system for determining a condition of the ONE.
20 . The ONE of claim 14 , wherein the ONE is part of a network including one or more additional optical network elements each having a loopback connection assembly for enabling loopback testing of different portions of the network.