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Charter - connecting C3700 to Arris TM1602A - no Wifi

Hello. I had not seen a similar post to my issue with the configuration I have.  I just moved to a place where I have Charter internet.  They sent me an Arris TM1602A modem.  When I connect to it with an Ethernet cable, I have internet access. For Wifi, I plugged in my Netgear C3700/N600 router/modem which I bought from BestBuy and used successfully to connect to Xfinity.  I right now struggle to find Wifi access; to clarify, I can connect to the Netgear router but the lights that are on are the power light and the LAN? (the one with the three devices linked) light. The downstream light blinks, the upstream light is off, and the internet light is off.

 

After searching around on here at different problems, I thought if I put the Netgear into a router mode that would work; well it did eliminate the possibility of logging back into 192.168.0.1 but did not connect the internet. So I had to a do a hard reset on the router so I could log back into 192.168.0.1 and back to where I started. I am a novice on this stuff; entering DHCP etc is unfamiliar to me so would need step by step instructions.  I am trying to connect my Mac products to this network.  Thank you very much in advance for your assistance!

Model: C3700|N600 Cable Gateway Docsis 3.0
Message 1 of 5
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Guru

Re: Charter - connecting C3700 to Arris TM1602A - no Wifi

> [...] Charter internet.  They sent me an Arris TM1602A modem. [...]

   Are you using its telephony features?  If not, then why not use your
old modem+router?

> [...] For Wifi, I plugged in my Netgear C3700/N600 router/modem [...]

   You "plugged" what, exactly, into what, exactly?  These devices have
multiple ports; saying only that they are connected is not a sufficient
description.

> [...] I thought if I put the Netgear into a router mode that would
> work; [...]

   By default, it should be in modem+router mode.  What, exactly, did
you do to it?  It does have a modem-only mode (exact opposite of "a
router mode").  As usual, showing actual actions with their actual
results (error messages, LED indicators, ...) can be more helpful than
vague descriptions or interpretations.  An accurate, detailed report of
actual events would be much more interesting than what you think it all
means.

   You won't be able to use two different cable-modem-devices (connected
by coaxial cable) to your cable service at the same time.  If you need
the telephony features of the TM1602A, then you can't use the C3700 as a
cable modem+router.  The C3700 lacks an Ethernet WAN/Internet port, so
you also can't use it as a simple wireless router.

> [...] I am trying to connect my Mac products to this network. [...]

   For multiple devices, you need a router.

   With some effort, you could use the C3700 as a wireless access point,
but you'd still need to have a router with an Ethernet WAN/Internet
port.  Summary: You need a router.  The TM1602A is only a modem (with
telephone features).  You can use the C3700 as a modem-only, but not as
a router-only.

Message 2 of 5
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Aspirant

Re: Charter - connecting C3700 to Arris TM1602A - no Wifi

> [...] Charter internet.  They sent me an Arris TM1602A modem. [...]

   Are you using its telephony features?  If not, then why not use your
old modem+router?

 

***I can't use my old modem/router because Charter won't allow it; they send you a new modem outright - no payment required.***

> [...] For Wifi, I plugged in my Netgear C3700/N600 router/modem [...]

   You "plugged" what, exactly, into what, exactly?  These devices have
multiple ports; saying only that they are connected is not a sufficient
description.

 

***From the coaxial cable coming out of the wall, I plugged the Arris into that with the coaxial cable. Then I plugged the C3700 into that via an Ethernet cable. I tried both Ethernet ports on the C3700; there is only one Ethernet port on the Arris.***

> [...] I thought if I put the Netgear into a router mode that would
> work; [...]

   By default, it should be in modem+router mode.  What, exactly, did
you do to it?  It does have a modem-only mode (exact opposite of "a
router mode").  As usual, showing actual actions with their actual
results (error messages, LED indicators, ...) can be more helpful than
vague descriptions or interpretations.  An accurate, detailed report of
actual events would be much more interesting than what you think it all
means.

   You won't be able to use two different cable-modem-devices (connected
by coaxial cable) to your cable service at the same time.  If you need
the telephony features of the TM1602A, then you can't use the C3700 as a
cable modem+router.  The C3700 lacks an Ethernet WAN/Internet port, so
you also can't use it as a simple wireless router.

 

**I don't need the telephone features on the Arris. I read that one does not want two modems competing since it won't work (yeah I know I'm vague; I can't do any better than that).  So I turned the router mode off on the log in screen for the C3700 at 192.168.0.1. I then lost the ability to reconnect to that page to view any other administrative tools. I read that one could use the C3700 as a wifi router using another modem. That is why I put the C3700 not into router mode.  Maybe that isn't the right method, so advice rather than criticism would help.***

> [...] I am trying to connect my Mac products to this network. [...]

   For multiple devices, you need a router. 

   With some effort, you could use the C3700 as a wireless access point,
but you'd still need to have a router with an Ethernet WAN/Internet
port.  Summary: You need a router.  The TM1602A is only a modem (with
telephone features).  You can use the C3700 as a modem-only, but not as
a router-only.

 

***This is what I was looking for; how can you verify that it cannot be used as router-only?***

 

Thanks for the help! This is unfamiliar to me, so I appreciate the help.

pyropinup

Message 3 of 5
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Guru

Re: Charter - connecting C3700 to Arris TM1602A - no Wifi

> ***I can't use my old modem/router because Charter won't allow it;
> they send you a new modem outright - no payment required.***

   Their willingness to supply a modem is not the same as their
unwillingness to let you use your own modem(+router).  Did you ask?  Did
they explain?

> **I don't need the telephone features on the Arris. [...]

   Then I see no reason for the C3700 to be incompatible with your ISP
service.  There may be one, but it's not obvious (and it may not be a
good one).

> ***From the coaxial cable coming out of the wall, I plugged the Arris
> into that with the coaxial cable. Then I plugged the C3700 into that via
> an Ethernet cable. I tried both Ethernet ports on the C3700; there is
> only one Ethernet port on the Arris.***

   Both Ethernet ports on the C3700 are LAN ports.  (Visit
http://netgear.com/support , put in your model number, and look for
Documentation.  Get the User Manual.  Look for "Rear Panel".)  The only
WAN/Internet connection on the C3700 is the internal one to its built-in
modem (which you can't use along with the TM1602A), and a WAN/Internet
port is what you would need to connect to the TM1602A modem.

> [...] I read that one does not want two modems competing since it
> won't work (yeah I know I'm vague; I can't do any better than that).

   "read" where?  You can't connect two modems to the same cable because
their signals interfere with each other.  (It's worse than "competing".)

> [...] So I turned the router mode off on the log in screen for the
> C3700 at 192.168.0.1. [...]

   "Modem" and "Router" are spelled differently for a reason.
Disabling the router in the C3700 won't stop the modem in the C3700 from
interfering with the modem in the TM1602A if you connect both their coax
ports to the same cable-TV source.

> [...] I then lost the ability to reconnect to that page to view any
> other administrative tools. [...]

   Access to the C3700 at "192.168.0.1" stops when you disable its
router.  You may still have a chance at "192.168.100.1", however.
Otherwise, a settings reset should restore normal modem+router mode.

> I read that one could use the C3700 as a wifi router using another
> modem.

   "read" where?  I don't see how.  The only WAN/Internet connection on
the C3700 is the internal one to its built-in modem.  With no Ethernet
WAN/Internet port, I don't see how you could use a C3700 as a router
with another modem.

>    With some effort, you could use the C3700 as a wireless access point,
> but you'd still need to have a router with an Ethernet WAN/Internet
> port.  [...]

   Still true.

> [...] That is why I put the C3700 not into router mode.

   You lost me.  You need a router.  Disabling the router in the C3700
does not give you a router.

> [...] Maybe that isn't the right method, so advice rather than
> criticism would help.***

   Trying.

> ***This is what I was looking for; how can you verify that it cannot
> be used as router-only?***

   Again, the only WAN/Internet connection on the C3700 is the internal
one to its built-in modem.  With no Ethernet WAN/Internet port, I don't
see how you could use a C3700 as a router with another modem.  There's
no place to connect another modem to the router in the C3700.

> [...] Summary: You need a router.  The TM1602A is only a modem (with
> telephone features).  You can use the C3700 as a modem-only, but not as
> a router-only.

   Still true.

   In principle, the router in the C3700 could work for you, but its
WAN/Internet port is inaccessible (and permanently connected to the
modem in the C3700), so you can't connect anything to it.  So,
practically, it's useless to you, unless you can also use the modem in
the C3700.  Again, I'd press the ISP about that.

Message 4 of 5
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Guru

Re: Charter - connecting C3700 to Arris TM1602A - no Wifi

   It doesn't help you at all, but if you fetch the User Manual for a
typical DSL modem+router, like, say, a D7000, you may notice that it
does have an Ethernet WAN/Internet port, and so it can be used as a
router with an external modem (even with a cable/fiber modem).

   I've never seen a Netgear cable-TV modem+router which has such a
feature.

Message 5 of 5
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