[NTLUG:Discuss] Off-Topic - ISDN Phones

[Eric Schnoebelen]

Jay Urish writes:
- Also, I don't think any LEC provides S/T isdn service. It's all NI-1.

	Actualy, the LEC's (local exchange carriers, aka, GTE,
SWBT, for the uninitiated) provide U (2 wire) interface BRI's.  The U
interface can be converted to S/T (4 wire) interfaces with an
NT1.

	Given the U interface is dominate in the US, most
products manufactured and distributed in the US support the U
interface directly, embedding the NT1 in the device.

	FYI: NI-1 is the protocols the switches use to talk to
the ISDN terminal equipment.  It stands for _N_ational _I_SDN _1_.
It superceedes the switch dependent ISDN implementations
(5ESS/AT&T, NTI/DMS100, Siemens, etc.)

- Greg E. writes:
- >The room where the computer is I'll use the POTS and 1 of my current 
- >phones but the other 2 rooms won't be able to use POTS out of the wall 
- >because it won't be there.  Converting the whole house to ISDN is more
- >cost effective than adding another line to the house since I've already
- >got 1 4-wire throughout.  Monthly ~$100 both POTS & ISDN vs $65 ISDN 
- >only.

	If you're planning on running S/T through out the house,
I have some Alpha Telecom SuperNT-1's that will be available in
a month or so. The SNT1 is a NT1 that also presents two POTS
ports in addition to converting between U and S/T.  They are set
up to pass the S/T bus through as well, and could easily act as
the NT1 in front of an S/T bus terminal adapter or router.

--
Eric Schnoebelen		eric at cirr.com		http://www.cirr.com
	... Had this been an actual emergency, we would have fled in
		terror, and you would not have been informed.