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Question POS point to point with no APS

One side

POS1/0/0

SECTION

LOF = 0 LOS = 0 BIP(B1) = 0

LINE

AIS = 0 RDI = 0 FEBE = 0 BIP(B2) = 0

PATH

AIS = 1 RDI = 2 FEBE = 1119 BIP(B3) = 463

PLM = 4 UNEQ = 0 TIM = 0 TIU = 0

LOP = 0 NEWPTR = 0 PSE = 0 NSE = 0

Active Defects: None

Active Alarms: None

Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA

Framing: SONET

APS

COAPS = 0 PSBF = 0

State: PSBF_state = False

Rx(K1/K2): 00/00 Tx(K1/K2): 00/00

S1S0 = 00, C2 = 16

Remote aps status (none); Reflected local aps status (none)

Other end

POS1/0/0

SECTION

LOF = 0 LOS = 0 BIP(B1) = 0

LINE

AIS = 0 RDI = 0 FEBE = 0 BIP(B2) = 0

PATH

AIS = 1 RDI = 1 FEBE = 419 BIP(B3) = 859

PLM = 3 UNEQ = 0 TIM = 0 TIU = 0

LOP = 0 NEWPTR = 0 PSE = 0 NSE = 0

Active Defects: None

Active Alarms: None

Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA

Framing: SONET

APS

COAPS = 0 PSBF = 0

State: PSBF_state = False

Rx(K1/K2): C0/15 Tx(K1/K2): 00/00

S1S0 = 00, C2 = 16

Remote aps status (none); Reflected local aps status (none)

My question is the Kbytes what does that mean loss of signal on RX ? Rx(K1/K2): C0/15 Tx(K1/K2): 00/00

There is no Auto protection Switching on this circuit it is straight point to point.

1 REPLY

Re: Question POS point to point with no APS

Hello,

the meaning of the K1/K2 bytes are defined in "Telcordia document GR-253—Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria".

K1/K2 = 00/00 means no APS (respective no APS requests)

K1/K2 = C0/15 means

K1 = 11000000, which translates to "low priority signal failure on protected channel"

K2 = 00010101, which translates to "working channel 1 in 1+1 redundancy, bidirectional mode"

So this can mean, that the provider equipment on one end has APS configured, whereas your euipment has no APS configured. APS is local between your interface and the provider equipment (multiplexer).

Hope this helps! Please rate all posts.

Regards, Martin

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