Sun refutes Globe on undelivered SMS: Check your systems, because all's fine on our end means BUSINESS

MANILA - Sun Cellular on Monday said its network can handle its 16 million subscribers, refuting Globe Telecom's claim that the third-ranked mobile provider was to blame for undelivered text messages last week.

In a statement, Sun Cellular said its National Operations Center (NOC) noticed that the success rate of SMS delivery from Sun to Globe subscribers at around 11:00 a.m. of January 16 started to drop from nearly 100 percent to less than 1 percent by about 2 p.m. of the same day.

Sun said its NOC engineers immediately checked its network and found everything in order, and so informed their Globe counterparts, who in turn said they would look into it. 

"At around the same time, the Smart NOC observed a similar drop in the success rate of SMS delivery from Smart to Globe subs.  At that point, SMS traffic from both Sun and Smart to Globe was being delayed or not delivered. Repeated follow ups with Globe NOC thru email and voice calls were made but to no avail," Sun said. 

The poor transmission continued until around 8 p.m., when SMS traffic between Smart and Sun to Globe subscribers started to normalize, according to Sun.

The telco said its network utilization rate stood at 58 percent on the average, which meant it had ample capacity for its more than 16 million customers. The company said it built its network to accommodate unlimited calls and texts nationwide.

"Hence there is no truth to the allegation by a rival network that the carrier is experiencing 'link congestion' with respect to text messaging," Sun said.

Sun said it was typical for a network undergoing modernization and upgrade to experience severe technical difficulties in its signal links with other networks, thus causing delayed or lost SMS between networks and even dropped inter-network calls.

Globe has yet to respond to Sun's claim as this went online. 

Sun and Smart are mobile phone units of Philippine Long Distance Telephone Co (PLDT). is the online news portal of TV5, a member of the PLDT group.