NIM-4T – 4-Port Serial WAN – Smart Serial NIM – 8 Mbps
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NIM-4T Description
NIM-4T is a Cisco 4000 Series ISR 4-port synchronous serial WAN Network Interface Module for branch routers that must terminate four Smart Serial circuits from one NIM slot.
The procurement difference is density: NIM-4T keeps the same 8 Mbps per-port serial ceiling and supported interface set as NIM-1T and NIM-2T, but it provides four serial connectors for higher WAN aggregation counts. That makes the cable plan and available router slot more important than buying multiple lower-port modules.
Quote review should lock down the Cisco ISR platform, Cisco IOS XE and IP Base baseline, DTE or DCE cable role for each circuit, clocking responsibility, and whether each WAN link will use HDLC, PPP, or Frame Relay encapsulation.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
NIM-4T |
|
Product family |
Cisco 4000 Series ISR serial WAN Network Interface Modules |
|
Product type |
4-port synchronous serial WAN NIM |
|
Cisco description |
4-Port Serial WAN Interface Card |
|
Interface role |
Synchronous serial WAN connectivity |
|
Connector type |
Smart Serial / 12-in-1 |
|
Connector count |
4 |
|
Ports per connector |
1 |
|
Maximum data rate per port |
8 Mbps |
|
Supported interfaces |
V.35, RS-232, X.21, EIA/TIA-449, EIA-530, and EIA-530A |
|
Supported encapsulations |
HDLC, PPP, and Frame Relay |
|
4400 Series software baseline |
Cisco IOS XE Release 3.12S or later with IP Base feature set |
|
Physical form factor |
Single-wide NIM with no slot restrictions |
Application Scenarios
Deploy NIM-4T when an ISR 4000 branch design needs four synchronous serial WAN links and the order should avoid spreading those circuits across several lower-density NIM slots.
Use this module when the site keeps legacy serial handoffs and the bill of materials already calls for Cisco Smart Serial cables in V.35, RS-232, X.21, EIA/TIA-449, EIA-530, or EIA-530A formats.
Select NIM-4T for migration projects that move WAN aggregation to a Cisco 4000 Series ISR while retaining documented HDLC, PPP, or Frame Relay operation on synchronous serial interfaces.
Product Comparison
|
Parameter |
NIM-4T | ||
|---|---|---|---|
|
Product family |
Cisco 1-, 2-, and 4-port serial NIMs |
Cisco 1-, 2-, and 4-port serial NIMs |
Cisco 1-, 2-, and 4-port serial NIMs |
|
Cisco description |
4-Port Serial WAN Interface Card |
2-Port Serial WAN Interface Card |
1-Port Serial WAN Interface Card |
|
Product type |
Synchronous serial WAN NIM |
Synchronous serial WAN NIM |
Synchronous serial WAN NIM |
|
Connector type |
Smart Serial / 12-in-1 |
Smart Serial / 12-in-1 |
Smart Serial / 12-in-1 |
|
Connector count |
4 |
2 |
1 |
|
Ports per connector |
1 |
1 |
1 |
|
Maximum data rate per port |
8 Mbps |
8 Mbps |
8 Mbps |
|
Supported interfaces |
V.35, RS-232, X.21, EIA/TIA-449, EIA-530, and EIA-530A |
V.35, RS-232, X.21, EIA/TIA-449, EIA-530, and EIA-530A |
V.35, RS-232, X.21, EIA/TIA-449, EIA-530, and EIA-530A |
|
Supported encapsulations |
HDLC, PPP, and Frame Relay |
HDLC, PPP, and Frame Relay |
HDLC, PPP, and Frame Relay |
|
4400 Series platform quantity in Cisco datasheet |
Up to 3 modules on Cisco 4451-X |
Up to 3 modules on Cisco 4451-X |
Up to 3 modules on Cisco 4451-X |
|
4400 Series software baseline |
Cisco IOS XE Release 3.12S or later with IP Base feature set |
Cisco IOS XE Release 3.12S or later with IP Base feature set |
Cisco IOS XE Release 3.12S or later with IP Base feature set |
|
Cisco 4000 Series interfaces page description |
4-Port Serial High-Speed WAN Interface Card |
2-Port Serial High-Speed WAN Interface Card |
1-Port Serial High-Speed WAN Interface Card |
- In a NIM-4T vs NIM-2T comparison, the table-backed difference is connector count: NIM-4T has four Smart Serial connectors while NIM-2T has two.
- The NIM-4T vs NIM-1T difference is larger port density in the same serial NIM family, with Cisco documenting four connectors on NIM-4T and one connector on NIM-1T.
- For buyers deciding which model to choose, the NIM-4T comparison should start with required serial circuit count, then check platform support, cable types, and the shared 8 Mbps per-port limit.
Selection Guide
1. Match NIM-4T to four serial circuits
Choose NIM-4T when the router BOM must present four synchronous serial WAN ports from one module and the target Cisco ISR supports the serial NIM placement.
2. Downshift only when port demand is lower
Use NIM-2T for two circuits or NIM-1T for one circuit when the design does not need four Smart Serial connectors in the same slot.
3. Treat cabling as part of the SKU decision
Plan each port around the required V.35, RS-232, X.21, EIA/TIA-449, EIA-530, or EIA-530A cable and confirm whether the link is DTE or DCE.
4. Keep protocol and software checks in the quote path
Verify HDLC, PPP, or Frame Relay requirements together with the documented Cisco IOS XE and IP Base baseline before releasing the order.
Ordering Checklist
|
Review Area |
Required Confirmation |
Procurement Risk |
|---|---|---|
|
Four-port identity |
Confirm the order is for NIM-4T with four Smart Serial connectors |
Prevents accidental replacement with the one-port NIM-1T or two-port NIM-2T during BOM cleanup |
|
Router placement |
Confirm a supported Cisco 4000 Series ISR NIM slot and module quantity plan |
Avoids assigning the serial WAN module to an unsupported router or slot plan |
|
Software baseline |
Check Cisco IOS XE Release 3.12S or later and IP Base feature set for 4400 Series deployments |
Keeps hardware ordering aligned with Cisco’s documented software requirement |
|
Cable interface |
Select the Smart Serial cable family for each V.35, RS-232, X.21, EIA/TIA-449, EIA-530, or EIA-530A handoff |
Wrong cable selection changes the physical interface delivered at the WAN edge |
|
DCE clocking |
Identify any ports that must provide DCE clocking and set a supported clock rate during configuration |
Prevents turn-up delays when a circuit depends on local timing |
|
Encapsulation scope |
Confirm HDLC, PPP, or Frame Relay for every serial link |
Keeps the deployment within the protocols Cisco documents for the serial NIM family |
|
Installation window |
Plan slot power shutdown or Cisco OIR command use before module insertion or removal |
Reduces field risk when the router is already installed |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Brand | Cisco | Product ID | NIM-4T |
| Product family | Cisco 4000 Series ISR serial WAN Network Interface Modules | Product type | Synchronous serial WAN NIM |
| Cisco description | 4-Port Serial WAN Interface Card | Connector type | Smart Serial / 12-in-1 |
| Connector count | 4 | Ports per connector | 1 |
| Maximum data rate per port | 8 Mbps | Supported interfaces | V.35, RS-232, X.21, EIA/TIA-449, EIA-530, and EIA-530A |
| Supported encapsulations | HDLC, PPP, and Frame Relay | Synchronous support | Yes |
| 4400 Series software baseline | Cisco IOS XE Release 3.12S or later | Feature set baseline | IP Base feature set |
| Physical form factor | Singlewide NI, no slot restrictions | Supported platform quantity in datasheet | Up to 3 modules on Cisco 4451-X |
| Clock rate range | 1200 to 8000000 bps for DCE interfaces | Default MTU | 1500 bytes |
| MTU range | 64 to 8100 bytes | Half duplex support | Not supported |
| Physical dimensions | 1.25 x 3.50 x 7.24 in. (3.18 x 8.89 x 18.39 cm) | Operating temperature | 32 to 104 degrees F (0 to 40 degrees C) |
| Storage temperature | -4 to 149 degrees F (-20 to 65 degrees C) | Relative humidity | 10 to 90 percent, noncondensing |
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