The businessman at the centre of Pakistan's "memogate" scandal has begun giving video link testimony to a judicial commission in Islamabad.
Mansoor Ijaz is giving evidence from London, having argued that returning to Pakistan would compromise his safety.
He alleges that Pakistan's former US ambassador, Husain Haqqani, drafted a memo at the behest of President Asif Ali Zardari seeking US help to avert a possible coup in Pakistan.
Both men deny Mr Ijaz's allegations.
Mr Haqqani was later forced to resign after the scandal caused an outcry among senior generals.
The BBC's M Ilyas Khan - who is attending the hearing in Islamabad - says Mr Ijaz's testimony will generate some media interest, but the drama it created at the end of last year has dissipated.
Our correspondent says the military has seemingly lost interest in the case, and no-one now expects the scandal to topple the government.
Mr Ijaz, an American businessman of Pakistani origin, revealed in October that he had been asked to deliver the anonymous memo to Adm Mike Mullen, the top US military officer at the time.
Adm Mullen's spokesman confirmed it had been received, but insisted it had not been acted upon.
The petitioner in the case is former Prime Minister Nawaz Sharif who accuses Mr Haqqani and President Zardari of a "treasonous" act in drafting the memo following the killing of Osama Bin Laden last May.
Mr Ijaz's appearance before the judges has been delayed for weeks.
He is now slowly recording his testimony at the hearing one sentence at a time, so the court stenographer in Pakistan can record his words.
Officials say this could continue well into the night, with cross-examination yet to begin.
Lets see who has has been telling the truth or untruth!
BBC News - Pakistan 'memogate' player Mansoor Ijaz testifies
Mansoor Ijaz is giving evidence from London, having argued that returning to Pakistan would compromise his safety.
He alleges that Pakistan's former US ambassador, Husain Haqqani, drafted a memo at the behest of President Asif Ali Zardari seeking US help to avert a possible coup in Pakistan.
Both men deny Mr Ijaz's allegations.
Mr Haqqani was later forced to resign after the scandal caused an outcry among senior generals.
The BBC's M Ilyas Khan - who is attending the hearing in Islamabad - says Mr Ijaz's testimony will generate some media interest, but the drama it created at the end of last year has dissipated.
Our correspondent says the military has seemingly lost interest in the case, and no-one now expects the scandal to topple the government.
Mr Ijaz, an American businessman of Pakistani origin, revealed in October that he had been asked to deliver the anonymous memo to Adm Mike Mullen, the top US military officer at the time.
Adm Mullen's spokesman confirmed it had been received, but insisted it had not been acted upon.
The petitioner in the case is former Prime Minister Nawaz Sharif who accuses Mr Haqqani and President Zardari of a "treasonous" act in drafting the memo following the killing of Osama Bin Laden last May.
Mr Ijaz's appearance before the judges has been delayed for weeks.
He is now slowly recording his testimony at the hearing one sentence at a time, so the court stenographer in Pakistan can record his words.
Officials say this could continue well into the night, with cross-examination yet to begin.
Lets see who has has been telling the truth or untruth!
BBC News - Pakistan 'memogate' player Mansoor Ijaz testifies
