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911 San Francisco Questions

I'm of the impression that calls to the San Francisco emergency number,

415-553-8090 are handled at the same call center with the same system as calls to 911. Someone tells me this is incorrect.

The discussion stems from questions about a park near two state freeways, and whether during 4th of July fireworks a person with a cell phone should call 911 or should call 415-553-8090, the situation being that their cell phone might connect with the CHP dispatch in Vallejo due to the phone's proximity to the state freeways.

One person who claims to have knowledge of the system says that 553-8090 is handled differently by different people than SF's 911 service. This ASSUMES that the cell phone is far enough away from the freeways that it connects with SF's 911 service directly and not the CHP's.

So, can anyone here explain how SF's emergency numbers, 911 and

415-553-8090, are handled, and how they might be different, and whether there is any significant delay or staffing problems between the two phone numbers? Also, how much of a delay there might be between the CHP's Vallejo routing and calling directly into SF's system would also be good to know.

This is not a hypothetical situation; it involves Bernal Hill park where the grass is dry and people have accidentally set fires nearly every year (and sometimes burned homes) due to use of fireworks on the hill. People have wanted to know the VERY fastest wasy to contact the SF fire department.

Thanks.

Reply to
David Kaye
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Hi David,

I had a similar question regarding my town (Los Altos CA) and I got the definitive answer by visiting the local PD HQ on my way to a haircut one day years ago after abandoning my landlines in 2002 and going cellphone only (though I now have an Ooma Telo system for home since March 2014).

The answer for Los Altos is to call 650-947-2779 which is the first entry in my cell phone's addressbook which I named "911 LOS ALTOS ALTERNATE" to be easy to identify in an emergency; that number goes to the exact same processing desk as a landline 911 call and an Ooma E911 call -- in other words, it's the same folks at the same desks. Calling 911 from my cell phone would likely go to the CHP given the cell tower near my home and 280.

The answer for San Francisco is similar as seen Googling this search term:

how do san francisco 911 and 415-553-8090 differ

where this is the first hit and it explains 911 and 415-553-8090 go to the same folks in San Francisco:

San Francisco Police Department : Contact Us

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Thad

Reply to
Thad Floryan

And this page confirms it for Los Altos:

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where we see:

Emergency - Police, Fire and Medical (TDD Access) 9-1-1 Emergency Alternate to 911 (dial when using a cell phone) (650) 947-2779

Thad

Reply to
Thad Floryan

"Thad Floryan" wrote

Well, yes, but I was looking for a more technical answer. For instance, is a call to 911 within SF treated like a remote call-forward, or exactly how does it work?

Reply to
David Kaye

A 911 call is NOT the same as regular call to the police department's listed "business" line. Wireline 911 calls typically ride dedicated trunks to a Selective Router (a specialized phone switch) that determines what PSAP (public safety answering point) the phone number's location is assigned to. Then the call goes to the PSAP on a dedicated circuit, not a listed number, and the calling party information (including address) pops up on the dispatcher's screen. The caller cannot hang up the 911 call; if they do, the PSAP can ring it back as they have seized the line (the opposite of the usual calling party control rule -- this latter function is unlikely to work on some VoIP systems).

Wireless 911 is handled differently. The phone and network use GPS to estimate the calling location, the call goes to a (typically regional) mobile 911 PSAP, and the dispatcher gets the coordinates from the network, which can display on a map.

Reply to
Fred Goldstein

[...]

Hi Fred,

Both the San Francisco and Los Altos police departments clearly state on their web pages to use the alternate emergency number from a cell phone. The alternate emergency number is *NOT* the business line of the respective police departments. Here are the two web pages again:

San Francisco Police Department : Contact Us

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where we see:

Life Threatening Emergencies or Crimes in Progress 911 (within San Francisco)

The purpose of San Francisco's 911 Emergency Telephone System is to provide for the immediate response of police, fire, or medical personnel for emergency occurrences. To accomplish this, it is imperative that the calls received on 911 lines be restricted to those situations that require immediate dispatching of Police, Paramedic, or Fire Department personnel.

Note: When calling 911 on a cellular phone near a highway, the call is connected to The California Highway Patrol (CHP) dispatch center. In other areas in San Francisco, the call will connect directly to SF dispatch. You can also dial directly to SF dispatch: 415-553-8090

Non-Emergency Situations - 415-553-0123 {i.e., their business line)

and for Los Altos CA (where I live):

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where we see:

Emergency - Police, Fire and Medical (TDD Access) 9-1-1 Emergency Alternate to 911 (dial when using a cell phone) (650) 947-2779 [...] 24-Hour Business Phone (650) 947-2770

Back when I was working (I'm now retired) I had the "ALTERNATE to 911" numbers for every city in which I had clients, customers, and employers in the address book (aka contact list) at the very beginning (i.e., first page) like so by preceding the deliberately uppercased NAME entries with "911" per:

911 CUPERTINO ALTERNATE 911 LOS ALTOS ALTERNATE 911 MENLO PARK ALTERNATE 911 MOUNTAIN VIEW ALT 911 PALO ALTO ALTERNATE 911 SANTA CLARA ALT 911 SAN JOSE ALTERNATE 911 SAN MATEO ALTERNATE 911 SUNNYVALE ALTERNATE [...]

Those numbers are still there because they encompass most of my travels on the San Francisco Peninsula.

Thad

Reply to
Thad Floryan

It may not be the business line, but it is also not an E911 trunk into the PSAP. Since *wireless* E911 does not normally go to the local PD, those who want to reach it from a wireless phone need to dial a specific number. But that is a plain old CO trunk, not coming from the Selective Router.

Back before the E in E911 added a database lookup, all 911 calls from a given switch were routed to the same place. Since a lot of the City of Boston had Brookline numbers (about a third of Brookline's numbers, IIRC, were in Boston), and another section had Milton numbers, people in those neighborhoods needed to call the PD's old 7-digit number (IIRC

338-1212) or get the wrong PD, but they had direct tie lines from those PDs to Boston to pass along the many 911 calls they got.
Reply to
Fred Goldstein

Just to throw my $0.02 in here.... in San Jose, we've been told by the SJPD to use the 10-digit emergency number when calling from a cell phone. It's just like using a landline in that the call, and GPS information goes directly to the emergency dispatcher. Even if you can't talk, as long as the line stays open, they will dispatch emergency vehicles to your location. Both fire and police if they don't know the nature of the emergency. However, the drawback is that it is area code specific so if you are out of your area code, then dialing

9-1-1 is your best bet so that the CHP can route your call.
Reply to
Otto Pylot

An article in today's San Francisco Chronicle:

911 system in state of emergency: understaffed, ill-equipped 8:59 am, Sunday, July 13, 2014

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hints that calling 911 may be moot and that it may be better to put out your own fires and/or drive yourself to the ER at the nearest hospital even if your guts are spilling out.

Thad

Reply to
Thad Floryan

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