Those routing centers are hardened. The explosion may have tripped some breakers feeding some servers and beasty routers/switches but probably 100% of that gear is active UPS systems with battery backup. Some of the hardware closest to the blast area might be trashed most of that stuff kept chugging along.

If there’s some outages it might be AT&T doing some maintenance, reboots, etc. Doesn’t look like any big damage to that building. You can see the blast wave compression on the sheet metal sides of the building. It def took a beating.