Officials say they have won new business and raised the call volume by 40 percent.
"But the volume of calls on those lines is below our projections."
M12s were used in larger cities that had lots of call volume.
Experts said the volume of calls from customers is likely to increase when the companies open for business on Monday.
The phone line was initially overwhelmed by a high call volume.
At the current time the department's call volume and number of volunteers does not require a need for a 5th station.
Average yearly call volume is over 4,000 calls and increasing.
I called back, but a recording said that the high volume of calls made it impossible to help me.
Both executives said their companies had not been receiving large volumes of calls.
And the city's special telephone line for heat complaints received a heavy volume of calls throughout the day.
In telecommunications, call volume refers to the number of telephone calls made during a certain time period.
Friday's accident occurred shortly before mid-morning, when calling volume typically peaks.
Its size depends on factors like terrain and call volume.
Revenues rose 12.4 percent, to almost $2.10 billion, from $2.03 billion a year ago, driven by an 18 percent increase in calling volume.
Calling volume, it said, was 25 percent above normal.
At fund companies, calling volume was up modestly, but few reported large redemptions.
AT&T says long distance calling volume increased 5% from a year ago.
Even though the company had additional computers available in case of unexpectedly high order and call volume, the backups were not enough.
Calling volume - the amount of traffic over its network - rose 10.1 percent.
The revenue gains came on a 12.4 percent increase in calling volume in the last year.
