It seems your installation is two stage , so the cable from the CBT , depending on the area , in an underground jointbox , the top of a pole or occasionally a wall mounted block , to the CSP is done by the first stage engineer ( this is done not the contractual date , but before it ) so that when the 2nd stage engineer ( who as stated fits the ONT ) will not have , unless you place undue restrictions on it , any issues completing the install on the contractual date…..presumably there must have been a suspicion that your address may have been ‘tricky’ , hence the 2 stages, possibly a concern that the duct to the house was blocked ( if underground service ) or if built to the curtilage, a trench required across your garden , or if overhead perhaps a line of sight issue , like trees causing an obstruction
