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AssigneesTranSwitch Corporation, ECI Telecom Ltd.
InventorsPaz Gilboa, Tat K. Ng
Estimating the term…
Jitter is limited in the mapping of a first telecommunications signal into a second telecommunications signal, by, upon receiving an indication that the payload pointer of the second telecommunications signal is moving in a first direction, generating a compensative payload pointer movement of the first telecommunications signal in a second direction which is opposite the first direction. The invention has particular application to the mapping of three E3 telecommunications signals which are in the format of a TUG-3 signal into an STS-3C SONET telecommunications signal in the STM-1 VC-4 format. When the STS-3C signal requires a pointer movement due to frequency compensation in the system, a compensative pointer movement at the TUG-3 level avoids eight units of jitter in the TUG-3 signal which could adversely affect system performance.
A method of limiting jitter in a first telecommunications signal having a first frame which is being mapped into a second telecommunications signal having a second frame, said first telecommunications signal having a first payload envelope and a first overhead, said first overhead including a first pointer which points to the location of the start of said first payload envelope wherein a value of said first pointer changes in conjunction with a stuff or destuff in said first telecommunications signal, and said second telecommunications signal having a second payload envelope and a second overhead, said second overhead including a second pointer which points to the location of the start of said second payload envelop wherein a value of said second pointer changes in conjunction with a stuff or destuff in said second telecommunications signal, said method comprising:
An apparatus for mapping a first telecommunications signal having a first frame into a second telecommunications signal having a second frame, said first telecommunications signal having a first payload envelope and a first overhead, said first overhead including a first pointer which points to the location of the start of the said first payload envelope, and said second telecommunications signal having a second payload envelope and a second overhead, said second overhead including a second pointer which points to the location of the start of said second payload envelop wherein a value of said second pointer changes in conjunction with a stuff or destuff in said second telecommunications signal, said apparatus comprising:
Dependencies are inferred from the claim text.